./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/eca-rers2012/Problem13_label44.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 4b7f120460c5e90aafe001aa1b39212c5555914a66c1599385ca623bf4c03471 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 12:56:41,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 12:56:41,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 12:56:41,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 12:56:41,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 12:56:41,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 12:56:41,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 12:56:41,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 12:56:41,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 12:56:41,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 12:56:41,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 12:56:41,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 12:56:41,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 12:56:41,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 12:56:41,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 12:56:41,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 12:56:41,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 12:56:41,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 12:56:41,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 12:56:41,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 12:56:41,803 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 12:56:41,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 12:56:41,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 12:56:41,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 12:56:41,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 12:56:41,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 12:56:41,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 12:56:41,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 12:56:41,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 12:56:41,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 12:56:41,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 12:56:41,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 12:56:41,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 12:56:41,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 12:56:41,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 12:56:41,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 12:56:41,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 12:56:41,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 12:56:41,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 12:56:41,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 12:56:41,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 12:56:41,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 12:56:41,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 12:56:41,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 12:56:41,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 12:56:41,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 12:56:41,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 12:56:41,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 12:56:41,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 12:56:41,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 12:56:41,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 12:56:41,848 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 12:56:41,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 12:56:41,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 12:56:41,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 12:56:41,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 12:56:41,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 12:56:41,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 12:56:41,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 12:56:41,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 12:56:41,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 12:56:41,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 12:56:41,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 12:56:41,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 12:56:41,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 12:56:41,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:56:41,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 12:56:41,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 12:56:41,853 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 12:56:41,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 12:56:41,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 12:56:41,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b7f120460c5e90aafe001aa1b39212c5555914a66c1599385ca623bf4c03471 [2022-07-13 12:56:42,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 12:56:42,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 12:56:42,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 12:56:42,058 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 12:56:42,059 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 12:56:42,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2022-07-13 12:56:42,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcd7e31f4/6aaafef0a21c4b53bd8e2f43c0c74b36/FLAG415b5edfc [2022-07-13 12:56:42,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 12:56:42,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2022-07-13 12:56:42,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcd7e31f4/6aaafef0a21c4b53bd8e2f43c0c74b36/FLAG415b5edfc [2022-07-13 12:56:43,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcd7e31f4/6aaafef0a21c4b53bd8e2f43c0c74b36 [2022-07-13 12:56:43,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 12:56:43,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 12:56:43,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 12:56:43,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 12:56:43,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 12:56:43,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:56:43" (1/1) ... [2022-07-13 12:56:43,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20364ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:43, skipping insertion in model container [2022-07-13 12:56:43,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 12:56:43" (1/1) ... [2022-07-13 12:56:43,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 12:56:43,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 12:56:43,426 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c[4499,4512] [2022-07-13 12:56:44,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:56:44,029 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 12:56:44,067 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/eca-rers2012/Problem13_label44.c[4499,4512] [2022-07-13 12:56:44,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 12:56:44,412 INFO L208 MainTranslator]: Completed translation [2022-07-13 12:56:44,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44 WrapperNode [2022-07-13 12:56:44,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 12:56:44,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 12:56:44,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 12:56:44,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 12:56:44,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:44,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:44,952 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-13 12:56:44,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 12:56:44,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 12:56:44,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 12:56:44,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 12:56:44,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:44,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 12:56:45,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 12:56:45,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 12:56:45,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 12:56:45,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (1/1) ... [2022-07-13 12:56:45,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 12:56:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:56:45,623 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) [2022-07-13 12:56:45,625 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 [2022-07-13 12:56:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 12:56:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 12:56:45,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 12:56:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 12:56:45,694 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 12:56:45,695 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 12:56:49,058 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 12:56:49,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 12:56:49,076 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 12:56:49,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:56:49 BoogieIcfgContainer [2022-07-13 12:56:49,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 12:56:49,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 12:56:49,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 12:56:49,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 12:56:49,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 12:56:43" (1/3) ... [2022-07-13 12:56:49,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:56:49, skipping insertion in model container [2022-07-13 12:56:49,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 12:56:44" (2/3) ... [2022-07-13 12:56:49,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 12:56:49, skipping insertion in model container [2022-07-13 12:56:49,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 12:56:49" (3/3) ... [2022-07-13 12:56:49,083 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label44.c [2022-07-13 12:56:49,091 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 12:56:49,092 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 12:56:49,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 12:56:49,137 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a2af6f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c7c6de [2022-07-13 12:56:49,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 12:56:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2022-07-13 12:56:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 12:56:49,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:56:49,148 INFO L195 NwaCegarLoop]: 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] [2022-07-13 12:56:49,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:56:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:56:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1722039382, now seen corresponding path program 1 times [2022-07-13 12:56:49,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:56:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367211197] [2022-07-13 12:56:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:56:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:56:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:56:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:56:49,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:56:49,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367211197] [2022-07-13 12:56:49,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367211197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:56:49,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:56:49,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:56:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742630355] [2022-07-13 12:56:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:56:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:56:49,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:56:49,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:56:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:56:49,427 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-07-13 12:56:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:56:54,892 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2022-07-13 12:56:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:56:54,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2022-07-13 12:56:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:56:54,911 INFO L225 Difference]: With dead ends: 3829 [2022-07-13 12:56:54,911 INFO L226 Difference]: Without dead ends: 2664 [2022-07-13 12:56:54,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 12:56:54,923 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 2730 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2730 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:56:54,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2730 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-13 12:56:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-07-13 12:56:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2022-07-13 12:56:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 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) [2022-07-13 12:56:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2022-07-13 12:56:55,037 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 30 [2022-07-13 12:56:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:56:55,038 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2022-07-13 12:56:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-07-13 12:56:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2022-07-13 12:56:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-13 12:56:55,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:56:55,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:56:55,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 12:56:55,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:56:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:56:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1847697995, now seen corresponding path program 1 times [2022-07-13 12:56:55,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:56:55,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110207368] [2022-07-13 12:56:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:56:55,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:56:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:56:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:56:55,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:56:55,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110207368] [2022-07-13 12:56:55,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110207368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:56:55,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:56:55,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:56:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456711547] [2022-07-13 12:56:55,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:56:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:56:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:56:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:56:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:56:55,251 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-13 12:57:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:00,654 INFO L93 Difference]: Finished difference Result 7866 states and 12670 transitions. [2022-07-13 12:57:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:57:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 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 155 [2022-07-13 12:57:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:00,674 INFO L225 Difference]: With dead ends: 7866 [2022-07-13 12:57:00,674 INFO L226 Difference]: Without dead ends: 5992 [2022-07-13 12:57:00,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:57:00,680 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 1651 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 6335 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 7165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 6335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:00,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1193 Invalid, 7165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 6335 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-07-13 12:57:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2022-07-13 12:57:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 5859. [2022-07-13 12:57:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4453738477296005) internal successors, (8467), 5858 states have internal predecessors, (8467), 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) [2022-07-13 12:57:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8467 transitions. [2022-07-13 12:57:00,754 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8467 transitions. Word has length 155 [2022-07-13 12:57:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:00,756 INFO L495 AbstractCegarLoop]: Abstraction has 5859 states and 8467 transitions. [2022-07-13 12:57:00,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 3 states have internal predecessors, (155), 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) [2022-07-13 12:57:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8467 transitions. [2022-07-13 12:57:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-13 12:57:00,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:00,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 12:57:00,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1240150338, now seen corresponding path program 1 times [2022-07-13 12:57:00,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:00,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412057255] [2022-07-13 12:57:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:00,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 12:57:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:00,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412057255] [2022-07-13 12:57:00,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412057255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:00,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:00,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:57:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770765917] [2022-07-13 12:57:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:00,899 INFO L87 Difference]: Start difference. First operand 5859 states and 8467 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2022-07-13 12:57:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:03,695 INFO L93 Difference]: Finished difference Result 15687 states and 23393 transitions. [2022-07-13 12:57:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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 197 [2022-07-13 12:57:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:03,723 INFO L225 Difference]: With dead ends: 15687 [2022-07-13 12:57:03,723 INFO L226 Difference]: Without dead ends: 10617 [2022-07-13 12:57:03,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:03,732 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:03,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:57:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2022-07-13 12:57:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2022-07-13 12:57:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3553313849344772) internal successors, (14376), 10607 states have internal predecessors, (14376), 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) [2022-07-13 12:57:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14376 transitions. [2022-07-13 12:57:03,849 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14376 transitions. Word has length 197 [2022-07-13 12:57:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:03,850 INFO L495 AbstractCegarLoop]: Abstraction has 10608 states and 14376 transitions. [2022-07-13 12:57:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2022-07-13 12:57:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14376 transitions. [2022-07-13 12:57:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-13 12:57:03,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:03,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:57:03,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 12:57:03,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1234602945, now seen corresponding path program 1 times [2022-07-13 12:57:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599505119] [2022-07-13 12:57:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:03,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 12:57:03,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:03,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599505119] [2022-07-13 12:57:03,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599505119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:03,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:03,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:57:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751821215] [2022-07-13 12:57:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:03,956 INFO L87 Difference]: Start difference. First operand 10608 states and 14376 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2022-07-13 12:57:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:07,024 INFO L93 Difference]: Finished difference Result 28351 states and 39246 transitions. [2022-07-13 12:57:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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 211 [2022-07-13 12:57:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:07,070 INFO L225 Difference]: With dead ends: 28351 [2022-07-13 12:57:07,070 INFO L226 Difference]: Without dead ends: 18532 [2022-07-13 12:57:07,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:07,081 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:07,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 613 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-13 12:57:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2022-07-13 12:57:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18523. [2022-07-13 12:57:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3253428355469172) internal successors, (24548), 18522 states have internal predecessors, (24548), 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) [2022-07-13 12:57:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24548 transitions. [2022-07-13 12:57:07,291 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24548 transitions. Word has length 211 [2022-07-13 12:57:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:07,291 INFO L495 AbstractCegarLoop]: Abstraction has 18523 states and 24548 transitions. [2022-07-13 12:57:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2022-07-13 12:57:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24548 transitions. [2022-07-13 12:57:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-13 12:57:07,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:07,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:07,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 12:57:07,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1053087695, now seen corresponding path program 1 times [2022-07-13 12:57:07,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858747112] [2022-07-13 12:57:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-13 12:57:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858747112] [2022-07-13 12:57:07,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858747112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:07,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:07,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:57:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890248440] [2022-07-13 12:57:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:07,390 INFO L87 Difference]: Start difference. First operand 18523 states and 24548 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-07-13 12:57:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:10,107 INFO L93 Difference]: Finished difference Result 51208 states and 68761 transitions. [2022-07-13 12:57:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 223 [2022-07-13 12:57:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:10,155 INFO L225 Difference]: With dead ends: 51208 [2022-07-13 12:57:10,156 INFO L226 Difference]: Without dead ends: 33474 [2022-07-13 12:57:10,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:10,177 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:10,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-13 12:57:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33474 states. [2022-07-13 12:57:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33474 to 32684. [2022-07-13 12:57:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32684 states, 32683 states have (on average 1.2454181072728943) internal successors, (40704), 32683 states have internal predecessors, (40704), 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) [2022-07-13 12:57:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32684 states to 32684 states and 40704 transitions. [2022-07-13 12:57:10,697 INFO L78 Accepts]: Start accepts. Automaton has 32684 states and 40704 transitions. Word has length 223 [2022-07-13 12:57:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:10,698 INFO L495 AbstractCegarLoop]: Abstraction has 32684 states and 40704 transitions. [2022-07-13 12:57:10,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-07-13 12:57:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32684 states and 40704 transitions. [2022-07-13 12:57:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-13 12:57:10,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:10,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:10,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 12:57:10,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -10527977, now seen corresponding path program 1 times [2022-07-13 12:57:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28899976] [2022-07-13 12:57:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:57:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28899976] [2022-07-13 12:57:10,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28899976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:10,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:10,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542979174] [2022-07-13 12:57:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:10,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:57:10,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:57:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:57:10,804 INFO L87 Difference]: Start difference. First operand 32684 states and 40704 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-13 12:57:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:16,613 INFO L93 Difference]: Finished difference Result 87628 states and 111186 transitions. [2022-07-13 12:57:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:57:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 227 [2022-07-13 12:57:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:16,843 INFO L225 Difference]: With dead ends: 87628 [2022-07-13 12:57:16,843 INFO L226 Difference]: Without dead ends: 55733 [2022-07-13 12:57:16,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:57:16,863 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 1736 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6142 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 7271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 6142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:16,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 838 Invalid, 7271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 6142 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-13 12:57:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55733 states. [2022-07-13 12:57:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55733 to 54816. [2022-07-13 12:57:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54816 states, 54815 states have (on average 1.2438566085925384) internal successors, (68182), 54815 states have internal predecessors, (68182), 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) [2022-07-13 12:57:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54816 states to 54816 states and 68182 transitions. [2022-07-13 12:57:17,321 INFO L78 Accepts]: Start accepts. Automaton has 54816 states and 68182 transitions. Word has length 227 [2022-07-13 12:57:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 54816 states and 68182 transitions. [2022-07-13 12:57:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-07-13 12:57:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 54816 states and 68182 transitions. [2022-07-13 12:57:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-13 12:57:17,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:17,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:17,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 12:57:17,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1712465374, now seen corresponding path program 1 times [2022-07-13 12:57:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784622526] [2022-07-13 12:57:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 12:57:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784622526] [2022-07-13 12:57:17,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784622526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:17,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:17,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:17,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335911018] [2022-07-13 12:57:17,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:17,400 INFO L87 Difference]: Start difference. First operand 54816 states and 68182 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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) [2022-07-13 12:57:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:20,587 INFO L93 Difference]: Finished difference Result 152927 states and 191818 transitions. [2022-07-13 12:57:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:20,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 237 [2022-07-13 12:57:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:20,727 INFO L225 Difference]: With dead ends: 152927 [2022-07-13 12:57:20,728 INFO L226 Difference]: Without dead ends: 98900 [2022-07-13 12:57:20,769 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:57:20,772 INFO L413 NwaCegarLoop]: 900 mSDtfsCounter, 818 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 896 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:20,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1016 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [896 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 12:57:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98900 states. [2022-07-13 12:57:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98900 to 98889. [2022-07-13 12:57:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98889 states, 98888 states have (on average 1.1900331688374728) internal successors, (117680), 98888 states have internal predecessors, (117680), 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) [2022-07-13 12:57:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98889 states to 98889 states and 117680 transitions. [2022-07-13 12:57:22,042 INFO L78 Accepts]: Start accepts. Automaton has 98889 states and 117680 transitions. Word has length 237 [2022-07-13 12:57:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:22,042 INFO L495 AbstractCegarLoop]: Abstraction has 98889 states and 117680 transitions. [2022-07-13 12:57:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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) [2022-07-13 12:57:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 98889 states and 117680 transitions. [2022-07-13 12:57:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-07-13 12:57:22,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:22,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 12:57:22,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 12:57:22,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1363018496, now seen corresponding path program 1 times [2022-07-13 12:57:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:22,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062900643] [2022-07-13 12:57:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:22,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-13 12:57:22,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:22,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062900643] [2022-07-13 12:57:22,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062900643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:22,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:22,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 12:57:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182675430] [2022-07-13 12:57:22,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:22,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:22,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:22,201 INFO L87 Difference]: Start difference. First operand 98889 states and 117680 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2022-07-13 12:57:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:25,146 INFO L93 Difference]: Finished difference Result 182823 states and 219258 transitions. [2022-07-13 12:57:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:25,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 313 [2022-07-13 12:57:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:25,272 INFO L225 Difference]: With dead ends: 182823 [2022-07-13 12:57:25,272 INFO L226 Difference]: Without dead ends: 98901 [2022-07-13 12:57:25,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:25,312 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 730 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:25,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1202 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 12:57:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98901 states. [2022-07-13 12:57:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98901 to 98889. [2022-07-13 12:57:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98889 states, 98888 states have (on average 1.1891230482970634) internal successors, (117590), 98888 states have internal predecessors, (117590), 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) [2022-07-13 12:57:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98889 states to 98889 states and 117590 transitions. [2022-07-13 12:57:26,377 INFO L78 Accepts]: Start accepts. Automaton has 98889 states and 117590 transitions. Word has length 313 [2022-07-13 12:57:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:26,378 INFO L495 AbstractCegarLoop]: Abstraction has 98889 states and 117590 transitions. [2022-07-13 12:57:26,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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) [2022-07-13 12:57:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 98889 states and 117590 transitions. [2022-07-13 12:57:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-13 12:57:26,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:26,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 12:57:26,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash -753738387, now seen corresponding path program 1 times [2022-07-13 12:57:26,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:26,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059754289] [2022-07-13 12:57:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:26,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 12:57:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059754289] [2022-07-13 12:57:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059754289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:26,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865088088] [2022-07-13 12:57:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:26,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:26,474 INFO L87 Difference]: Start difference. First operand 98889 states and 117590 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-13 12:57:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:29,717 INFO L93 Difference]: Finished difference Result 196994 states and 234399 transitions. [2022-07-13 12:57:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:29,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 316 [2022-07-13 12:57:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:29,848 INFO L225 Difference]: With dead ends: 196994 [2022-07-13 12:57:29,848 INFO L226 Difference]: Without dead ends: 98894 [2022-07-13 12:57:29,874 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:57:29,874 INFO L413 NwaCegarLoop]: 1441 mSDtfsCounter, 941 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:29,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 1534 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 12:57:29,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98894 states. [2022-07-13 12:57:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98894 to 96520. [2022-07-13 12:57:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96520 states, 96519 states have (on average 1.1504988655083455) internal successors, (111045), 96519 states have internal predecessors, (111045), 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) [2022-07-13 12:57:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96520 states to 96520 states and 111045 transitions. [2022-07-13 12:57:30,825 INFO L78 Accepts]: Start accepts. Automaton has 96520 states and 111045 transitions. Word has length 316 [2022-07-13 12:57:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:30,825 INFO L495 AbstractCegarLoop]: Abstraction has 96520 states and 111045 transitions. [2022-07-13 12:57:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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) [2022-07-13 12:57:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 96520 states and 111045 transitions. [2022-07-13 12:57:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-07-13 12:57:30,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:30,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:30,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 12:57:30,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1650510668, now seen corresponding path program 1 times [2022-07-13 12:57:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521925756] [2022-07-13 12:57:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 12:57:30,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521925756] [2022-07-13 12:57:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521925756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:30,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:30,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:30,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686988459] [2022-07-13 12:57:30,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:30,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:30,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:30,949 INFO L87 Difference]: Start difference. First operand 96520 states and 111045 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-07-13 12:57:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:34,236 INFO L93 Difference]: Finished difference Result 224527 states and 259960 transitions. [2022-07-13 12:57:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 326 [2022-07-13 12:57:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:34,393 INFO L225 Difference]: With dead ends: 224527 [2022-07-13 12:57:34,393 INFO L226 Difference]: Without dead ends: 128796 [2022-07-13 12:57:34,443 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:57:34,443 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 912 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:34,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 848 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 12:57:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128796 states. [2022-07-13 12:57:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128796 to 128775. [2022-07-13 12:57:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128775 states, 128774 states have (on average 1.1359591221830494) internal successors, (146282), 128774 states have internal predecessors, (146282), 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) [2022-07-13 12:57:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128775 states to 128775 states and 146282 transitions. [2022-07-13 12:57:35,950 INFO L78 Accepts]: Start accepts. Automaton has 128775 states and 146282 transitions. Word has length 326 [2022-07-13 12:57:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:35,950 INFO L495 AbstractCegarLoop]: Abstraction has 128775 states and 146282 transitions. [2022-07-13 12:57:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-07-13 12:57:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 128775 states and 146282 transitions. [2022-07-13 12:57:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-07-13 12:57:35,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:35,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 12:57:35,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 128523030, now seen corresponding path program 1 times [2022-07-13 12:57:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:35,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700135661] [2022-07-13 12:57:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 199 proven. 110 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 12:57:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700135661] [2022-07-13 12:57:36,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700135661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 12:57:36,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023179049] [2022-07-13 12:57:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:36,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 12:57:36,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 12:57:36,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 12:57:36,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 12:57:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:36,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 12:57:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 12:57:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-13 12:57:36,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 12:57:36,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023179049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:36,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 12:57:36,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-13 12:57:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792973218] [2022-07-13 12:57:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:36,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:36,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:57:36,661 INFO L87 Difference]: Start difference. First operand 128775 states and 146282 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2022-07-13 12:57:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:39,636 INFO L93 Difference]: Finished difference Result 255972 states and 290737 transitions. [2022-07-13 12:57:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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 342 [2022-07-13 12:57:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:39,783 INFO L225 Difference]: With dead ends: 255972 [2022-07-13 12:57:39,783 INFO L226 Difference]: Without dead ends: 127986 [2022-07-13 12:57:39,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 12:57:39,846 INFO L413 NwaCegarLoop]: 1359 mSDtfsCounter, 1134 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:39,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 1441 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 12:57:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127986 states. [2022-07-13 12:57:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127986 to 127985. [2022-07-13 12:57:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127985 states, 127984 states have (on average 1.1008172896612076) internal successors, (140887), 127984 states have internal predecessors, (140887), 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) [2022-07-13 12:57:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127985 states to 127985 states and 140887 transitions. [2022-07-13 12:57:41,353 INFO L78 Accepts]: Start accepts. Automaton has 127985 states and 140887 transitions. Word has length 342 [2022-07-13 12:57:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:41,354 INFO L495 AbstractCegarLoop]: Abstraction has 127985 states and 140887 transitions. [2022-07-13 12:57:41,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 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) [2022-07-13 12:57:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 127985 states and 140887 transitions. [2022-07-13 12:57:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-13 12:57:41,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:41,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:41,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 12:57:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 12:57:41,571 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 943803456, now seen corresponding path program 1 times [2022-07-13 12:57:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253910010] [2022-07-13 12:57:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-13 12:57:41,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:41,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253910010] [2022-07-13 12:57:41,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253910010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:41,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:41,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:41,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228776176] [2022-07-13 12:57:41,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:41,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:41,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:41,689 INFO L87 Difference]: Start difference. First operand 127985 states and 140887 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2022-07-13 12:57:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:45,111 INFO L93 Difference]: Finished difference Result 288263 states and 317524 transitions. [2022-07-13 12:57:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:57:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 357 [2022-07-13 12:57:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:45,280 INFO L225 Difference]: With dead ends: 288263 [2022-07-13 12:57:45,280 INFO L226 Difference]: Without dead ends: 161067 [2022-07-13 12:57:45,312 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:57:45,313 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 844 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:45,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1100 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-13 12:57:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161067 states. [2022-07-13 12:57:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161067 to 157105. [2022-07-13 12:57:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157105 states, 157104 states have (on average 1.0928174966900905) internal successors, (171686), 157104 states have internal predecessors, (171686), 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) [2022-07-13 12:57:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157105 states to 157105 states and 171686 transitions. [2022-07-13 12:57:47,038 INFO L78 Accepts]: Start accepts. Automaton has 157105 states and 171686 transitions. Word has length 357 [2022-07-13 12:57:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:47,039 INFO L495 AbstractCegarLoop]: Abstraction has 157105 states and 171686 transitions. [2022-07-13 12:57:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2022-07-13 12:57:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 157105 states and 171686 transitions. [2022-07-13 12:57:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-13 12:57:47,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:47,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 12:57:47,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -376200934, now seen corresponding path program 1 times [2022-07-13 12:57:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:47,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417472325] [2022-07-13 12:57:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-13 12:57:47,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417472325] [2022-07-13 12:57:47,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417472325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:47,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:47,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:47,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584593669] [2022-07-13 12:57:47,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:47,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 12:57:47,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 12:57:47,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:57:47,153 INFO L87 Difference]: Start difference. First operand 157105 states and 171686 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-07-13 12:57:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:57:53,296 INFO L93 Difference]: Finished difference Result 360842 states and 394845 transitions. [2022-07-13 12:57:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 12:57:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 359 [2022-07-13 12:57:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:57:53,561 INFO L225 Difference]: With dead ends: 360842 [2022-07-13 12:57:53,561 INFO L226 Difference]: Without dead ends: 204526 [2022-07-13 12:57:53,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 12:57:53,640 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1711 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 5920 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 6753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 5920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-13 12:57:53,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1711 Valid, 708 Invalid, 6753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 5920 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-13 12:57:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204526 states. [2022-07-13 12:57:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204526 to 203609. [2022-07-13 12:57:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203609 states, 203608 states have (on average 1.0939599622804606) internal successors, (222739), 203608 states have internal predecessors, (222739), 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) [2022-07-13 12:57:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203609 states to 203609 states and 222739 transitions. [2022-07-13 12:57:56,498 INFO L78 Accepts]: Start accepts. Automaton has 203609 states and 222739 transitions. Word has length 359 [2022-07-13 12:57:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:57:56,499 INFO L495 AbstractCegarLoop]: Abstraction has 203609 states and 222739 transitions. [2022-07-13 12:57:56,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-07-13 12:57:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 203609 states and 222739 transitions. [2022-07-13 12:57:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-07-13 12:57:56,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:57:56,511 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:57:56,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 12:57:56,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:57:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:57:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 792037552, now seen corresponding path program 1 times [2022-07-13 12:57:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:57:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299778162] [2022-07-13 12:57:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:57:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:57:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:57:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-13 12:57:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:57:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299778162] [2022-07-13 12:57:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299778162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:57:56,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:57:56,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:57:56,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839984093] [2022-07-13 12:57:56,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:57:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:57:56,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:57:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:57:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:57:56,604 INFO L87 Difference]: Start difference. First operand 203609 states and 222739 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-07-13 12:58:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:00,047 INFO L93 Difference]: Finished difference Result 414266 states and 452542 transitions. [2022-07-13 12:58:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 388 [2022-07-13 12:58:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:00,315 INFO L225 Difference]: With dead ends: 414266 [2022-07-13 12:58:00,316 INFO L226 Difference]: Without dead ends: 211446 [2022-07-13 12:58:00,400 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:58:00,401 INFO L413 NwaCegarLoop]: 1494 mSDtfsCounter, 1027 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:00,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 1627 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 12:58:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211446 states. [2022-07-13 12:58:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211446 to 199626. [2022-07-13 12:58:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199626 states, 199625 states have (on average 1.0674965560425798) internal successors, (213099), 199625 states have internal predecessors, (213099), 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) [2022-07-13 12:58:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199626 states to 199626 states and 213099 transitions. [2022-07-13 12:58:03,265 INFO L78 Accepts]: Start accepts. Automaton has 199626 states and 213099 transitions. Word has length 388 [2022-07-13 12:58:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 12:58:03,265 INFO L495 AbstractCegarLoop]: Abstraction has 199626 states and 213099 transitions. [2022-07-13 12:58:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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) [2022-07-13 12:58:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 199626 states and 213099 transitions. [2022-07-13 12:58:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-07-13 12:58:03,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 12:58:03,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 12:58:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 12:58:03,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 12:58:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 12:58:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash 934741687, now seen corresponding path program 1 times [2022-07-13 12:58:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 12:58:03,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161674697] [2022-07-13 12:58:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 12:58:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 12:58:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 12:58:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-13 12:58:03,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 12:58:03,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161674697] [2022-07-13 12:58:03,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161674697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 12:58:03,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 12:58:03,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 12:58:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971929438] [2022-07-13 12:58:03,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 12:58:03,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 12:58:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 12:58:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 12:58:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 12:58:03,366 INFO L87 Difference]: Start difference. First operand 199626 states and 213099 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-07-13 12:58:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 12:58:07,140 INFO L93 Difference]: Finished difference Result 436246 states and 467049 transitions. [2022-07-13 12:58:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 12:58:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 392 [2022-07-13 12:58:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 12:58:07,458 INFO L225 Difference]: With dead ends: 436246 [2022-07-13 12:58:07,459 INFO L226 Difference]: Without dead ends: 237409 [2022-07-13 12:58:07,553 INFO L412 NwaCegarLoop]: 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 [2022-07-13 12:58:07,555 INFO L413 NwaCegarLoop]: 1744 mSDtfsCounter, 787 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-13 12:58:07,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1883 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-13 12:58:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237409 states.