./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label58.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 80e930446c3b5aed0357903e7f6687fdab832b55b1199711672275ec34cd4ed8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:03:13,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:03:13,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:03:13,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:03:13,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:03:13,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:03:13,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:03:13,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:03:13,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:03:13,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:03:13,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:03:13,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:03:13,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:03:13,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:03:13,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:03:13,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:03:14,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:03:14,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:03:14,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:03:14,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:03:14,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:03:14,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:03:14,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:03:14,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:03:14,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:03:14,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:03:14,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:03:14,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:03:14,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:03:14,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:03:14,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:03:14,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:03:14,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:03:14,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:03:14,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:03:14,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:03:14,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:03:14,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:03:14,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:03:14,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:03:14,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:03:14,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:03:14,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:03:14,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:03:14,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:03:14,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:03:14,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:03:14,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:03:14,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:03:14,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:03:14,052 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:03:14,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:03:14,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:03:14,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:03:14,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:03:14,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:03:14,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:03:14,056 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:03:14,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:03:14,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:03:14,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:03:14,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e930446c3b5aed0357903e7f6687fdab832b55b1199711672275ec34cd4ed8 [2021-12-15 23:03:14,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:03:14,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:03:14,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:03:14,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:03:14,254 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:03:14,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label58.c [2021-12-15 23:03:14,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be1556aed/3b079219150d44baaa2639be64cbd292/FLAGc9b17fe5b [2021-12-15 23:03:14,816 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:03:14,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label58.c [2021-12-15 23:03:14,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be1556aed/3b079219150d44baaa2639be64cbd292/FLAGc9b17fe5b [2021-12-15 23:03:15,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be1556aed/3b079219150d44baaa2639be64cbd292 [2021-12-15 23:03:15,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:03:15,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:03:15,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:03:15,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:03:15,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:03:15,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:15" (1/1) ... [2021-12-15 23:03:15,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165afd4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:15, skipping insertion in model container [2021-12-15 23:03:15,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:15" (1/1) ... [2021-12-15 23:03:15,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:03:15,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:03:15,388 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/Problem17_label58.c[6741,6754] [2021-12-15 23:03:15,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:15,751 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:03:15,793 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/Problem17_label58.c[6741,6754] [2021-12-15 23:03:16,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:16,089 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:03:16,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16 WrapperNode [2021-12-15 23:03:16,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:03:16,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:16,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:03:16,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:03:16,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,339 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:03:16,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:16,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:03:16,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:03:16,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:03:16,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:03:16,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:03:16,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:03:16,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:03:16,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (1/1) ... [2021-12-15 23:03:16,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:03:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:16,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:03:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:03:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:03:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:03:16,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:03:16,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:03:16,680 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:03:16,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:03:18,867 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:03:18,880 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:03:18,881 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:03:18,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:18 BoogieIcfgContainer [2021-12-15 23:03:18,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:03:18,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:03:18,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:03:18,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:03:18,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:03:15" (1/3) ... [2021-12-15 23:03:18,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a40ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:18, skipping insertion in model container [2021-12-15 23:03:18,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:16" (2/3) ... [2021-12-15 23:03:18,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a40ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:18, skipping insertion in model container [2021-12-15 23:03:18,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:18" (3/3) ... [2021-12-15 23:03:18,891 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label58.c [2021-12-15 23:03:18,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:03:18,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:03:18,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:03:18,943 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:03:18,943 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:03:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 23:03:18,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:18,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:18,969 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-12-15 23:03:18,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:18,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722018058] [2021-12-15 23:03:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:18,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:19,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722018058] [2021-12-15 23:03:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722018058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:19,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:19,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003026937] [2021-12-15 23:03:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:19,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:19,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:19,152 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:21,587 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-15 23:03:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:21,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 45 [2021-12-15 23:03:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:21,602 INFO L225 Difference]: With dead ends: 1667 [2021-12-15 23:03:21,602 INFO L226 Difference]: Without dead ends: 998 [2021-12-15 23:03:21,606 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:03:21,609 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 500 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:21,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:03:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-15 23:03:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-15 23:03:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-15 23:03:21,683 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 45 [2021-12-15 23:03:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:21,683 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-15 23:03:21,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-15 23:03:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 23:03:21,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:21,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:03:21,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:03:21,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1676282541, now seen corresponding path program 1 times [2021-12-15 23:03:21,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:21,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148773239] [2021-12-15 23:03:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:21,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:21,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:21,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148773239] [2021-12-15 23:03:21,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148773239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:21,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:21,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:21,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151737849] [2021-12-15 23:03:21,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:21,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:21,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:21,800 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:23,758 INFO L93 Difference]: Finished difference Result 2843 states and 4882 transitions. [2021-12-15 23:03:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 23:03:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:23,766 INFO L225 Difference]: With dead ends: 2843 [2021-12-15 23:03:23,766 INFO L226 Difference]: Without dead ends: 1863 [2021-12-15 23:03:23,768 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:03:23,769 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:23,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 495 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:03:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-15 23:03:23,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1857. [2021-12-15 23:03:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4552801724137931) internal successors, (2701), 1856 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2701 transitions. [2021-12-15 23:03:23,801 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2701 transitions. Word has length 110 [2021-12-15 23:03:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:23,801 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2701 transitions. [2021-12-15 23:03:23,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2701 transitions. [2021-12-15 23:03:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 23:03:23,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:23,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:03:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:03:23,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash -690077156, now seen corresponding path program 1 times [2021-12-15 23:03:23,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742593640] [2021-12-15 23:03:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:23,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:23,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:23,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742593640] [2021-12-15 23:03:23,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742593640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:23,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:23,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:23,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992196422] [2021-12-15 23:03:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:23,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:23,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:23,897 INFO L87 Difference]: Start difference. First operand 1857 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:25,455 INFO L93 Difference]: Finished difference Result 5425 states and 7895 transitions. [2021-12-15 23:03:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 116 [2021-12-15 23:03:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:25,466 INFO L225 Difference]: With dead ends: 5425 [2021-12-15 23:03:25,466 INFO L226 Difference]: Without dead ends: 3570 [2021-12-15 23:03:25,469 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:03:25,470 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-15 23:03:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2714. [2021-12-15 23:03:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.315886472539624) internal successors, (3570), 2713 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3570 transitions. [2021-12-15 23:03:25,515 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3570 transitions. Word has length 116 [2021-12-15 23:03:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:25,515 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3570 transitions. [2021-12-15 23:03:25,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3570 transitions. [2021-12-15 23:03:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-15 23:03:25,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:25,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:25,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:03:25,519 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash 544079772, now seen corresponding path program 1 times [2021-12-15 23:03:25,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001925431] [2021-12-15 23:03:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:25,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:25,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001925431] [2021-12-15 23:03:25,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001925431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:25,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:25,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 23:03:25,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3772088] [2021-12-15 23:03:25,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:25,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:03:25,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:03:25,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:03:25,629 INFO L87 Difference]: Start difference. First operand 2714 states and 3570 transitions. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:27,739 INFO L93 Difference]: Finished difference Result 7164 states and 9658 transitions. [2021-12-15 23:03:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:03:27,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 193 [2021-12-15 23:03:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:27,753 INFO L225 Difference]: With dead ends: 7164 [2021-12-15 23:03:27,753 INFO L226 Difference]: Without dead ends: 4452 [2021-12-15 23:03:27,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:27,758 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1684 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:27,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 858 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:03:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-12-15 23:03:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 4424. [2021-12-15 23:03:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.2912050644359032) internal successors, (5711), 4423 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5711 transitions. [2021-12-15 23:03:27,821 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5711 transitions. Word has length 193 [2021-12-15 23:03:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:27,823 INFO L470 AbstractCegarLoop]: Abstraction has 4424 states and 5711 transitions. [2021-12-15 23:03:27,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5711 transitions. [2021-12-15 23:03:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 23:03:27,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:27,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:27,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:03:27,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1198749749, now seen corresponding path program 1 times [2021-12-15 23:03:27,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74706946] [2021-12-15 23:03:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:27,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 23:03:27,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:27,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74706946] [2021-12-15 23:03:27,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74706946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:27,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:27,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:27,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889631177] [2021-12-15 23:03:27,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:27,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:27,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:27,971 INFO L87 Difference]: Start difference. First operand 4424 states and 5711 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:30,040 INFO L93 Difference]: Finished difference Result 10593 states and 13804 transitions. [2021-12-15 23:03:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:30,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 199 [2021-12-15 23:03:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:30,057 INFO L225 Difference]: With dead ends: 10593 [2021-12-15 23:03:30,058 INFO L226 Difference]: Without dead ends: 6171 [2021-12-15 23:03:30,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:30,064 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 508 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:30,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 240 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:03:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2021-12-15 23:03:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 6153. [2021-12-15 23:03:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 1.303966189856957) internal successors, (8022), 6152 states have internal predecessors, (8022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8022 transitions. [2021-12-15 23:03:30,148 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8022 transitions. Word has length 199 [2021-12-15 23:03:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:30,149 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 8022 transitions. [2021-12-15 23:03:30,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8022 transitions. [2021-12-15 23:03:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-15 23:03:30,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:30,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:03:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:03:30,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -654017339, now seen corresponding path program 1 times [2021-12-15 23:03:30,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864815144] [2021-12-15 23:03:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:30,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:30,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864815144] [2021-12-15 23:03:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864815144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030891177] [2021-12-15 23:03:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:30,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:30,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:03:30,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:03:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:03:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:30,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:31,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030891177] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:31,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:03:31,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-12-15 23:03:31,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429841428] [2021-12-15 23:03:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:31,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:31,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:03:31,337 INFO L87 Difference]: Start difference. First operand 6153 states and 8022 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:34,360 INFO L93 Difference]: Finished difference Result 19997 states and 26780 transitions. [2021-12-15 23:03:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:34,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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 265 [2021-12-15 23:03:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:34,393 INFO L225 Difference]: With dead ends: 19997 [2021-12-15 23:03:34,393 INFO L226 Difference]: Without dead ends: 12537 [2021-12-15 23:03:34,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:03:34,408 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1056 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 1396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1396 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:34,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 153 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1396 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 23:03:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12537 states. [2021-12-15 23:03:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12537 to 12531. [2021-12-15 23:03:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12531 states, 12530 states have (on average 1.2289704708699123) internal successors, (15399), 12530 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12531 states to 12531 states and 15399 transitions. [2021-12-15 23:03:34,622 INFO L78 Accepts]: Start accepts. Automaton has 12531 states and 15399 transitions. Word has length 265 [2021-12-15 23:03:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:34,623 INFO L470 AbstractCegarLoop]: Abstraction has 12531 states and 15399 transitions. [2021-12-15 23:03:34,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 12531 states and 15399 transitions. [2021-12-15 23:03:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-15 23:03:34,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:34,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 23:03:34,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -925800976, now seen corresponding path program 1 times [2021-12-15 23:03:34,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:34,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557919990] [2021-12-15 23:03:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:34,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:03:34,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557919990] [2021-12-15 23:03:34,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557919990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:34,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:34,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:34,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757511817] [2021-12-15 23:03:34,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:34,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:34,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:34,956 INFO L87 Difference]: Start difference. First operand 12531 states and 15399 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:36,512 INFO L93 Difference]: Finished difference Result 30195 states and 36859 transitions. [2021-12-15 23:03:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:36,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 302 [2021-12-15 23:03:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:36,537 INFO L225 Difference]: With dead ends: 30195 [2021-12-15 23:03:36,537 INFO L226 Difference]: Without dead ends: 16816 [2021-12-15 23:03:36,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:36,550 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 413 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:36,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 859 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:03:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16816 states. [2021-12-15 23:03:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16816 to 16805. [2021-12-15 23:03:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16805 states, 16804 states have (on average 1.1906688883599144) internal successors, (20008), 16804 states have internal predecessors, (20008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16805 states to 16805 states and 20008 transitions. [2021-12-15 23:03:36,781 INFO L78 Accepts]: Start accepts. Automaton has 16805 states and 20008 transitions. Word has length 302 [2021-12-15 23:03:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:36,782 INFO L470 AbstractCegarLoop]: Abstraction has 16805 states and 20008 transitions. [2021-12-15 23:03:36,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 16805 states and 20008 transitions. [2021-12-15 23:03:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 23:03:36,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:36,787 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-15 23:03:36,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:03:36,788 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1794999384, now seen corresponding path program 1 times [2021-12-15 23:03:36,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533495459] [2021-12-15 23:03:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:36,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:03:36,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533495459] [2021-12-15 23:03:36,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533495459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:36,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:36,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:36,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007456613] [2021-12-15 23:03:36,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:36,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:36,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:36,892 INFO L87 Difference]: Start difference. First operand 16805 states and 20008 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:38,528 INFO L93 Difference]: Finished difference Result 40835 states and 48524 transitions. [2021-12-15 23:03:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 348 [2021-12-15 23:03:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:38,571 INFO L225 Difference]: With dead ends: 40835 [2021-12-15 23:03:38,571 INFO L226 Difference]: Without dead ends: 21900 [2021-12-15 23:03:38,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:38,588 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 374 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:38,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 810 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21900 states. [2021-12-15 23:03:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21900 to 21894. [2021-12-15 23:03:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21894 states, 21893 states have (on average 1.1318229571095784) internal successors, (24779), 21893 states have internal predecessors, (24779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21894 states to 21894 states and 24779 transitions. [2021-12-15 23:03:38,891 INFO L78 Accepts]: Start accepts. Automaton has 21894 states and 24779 transitions. Word has length 348 [2021-12-15 23:03:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 21894 states and 24779 transitions. [2021-12-15 23:03:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 21894 states and 24779 transitions. [2021-12-15 23:03:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-15 23:03:38,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:38,898 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-15 23:03:38,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:03:38,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1446279023, now seen corresponding path program 1 times [2021-12-15 23:03:38,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:38,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832648576] [2021-12-15 23:03:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:38,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:03:38,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832648576] [2021-12-15 23:03:38,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832648576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:38,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:38,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:38,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599265387] [2021-12-15 23:03:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:39,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:39,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:39,001 INFO L87 Difference]: Start difference. First operand 21894 states and 24779 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:40,540 INFO L93 Difference]: Finished difference Result 48460 states and 55073 transitions. [2021-12-15 23:03:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 373 [2021-12-15 23:03:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:40,574 INFO L225 Difference]: With dead ends: 48460 [2021-12-15 23:03:40,574 INFO L226 Difference]: Without dead ends: 26568 [2021-12-15 23:03:40,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:40,586 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 369 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:40,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 790 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:03:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26568 states. [2021-12-15 23:03:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26568 to 26568. [2021-12-15 23:03:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26568 states, 26567 states have (on average 1.1179658975420634) internal successors, (29701), 26567 states have internal predecessors, (29701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26568 states to 26568 states and 29701 transitions. [2021-12-15 23:03:40,825 INFO L78 Accepts]: Start accepts. Automaton has 26568 states and 29701 transitions. Word has length 373 [2021-12-15 23:03:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:40,826 INFO L470 AbstractCegarLoop]: Abstraction has 26568 states and 29701 transitions. [2021-12-15 23:03:40,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 26568 states and 29701 transitions. [2021-12-15 23:03:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-15 23:03:40,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:40,834 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1] [2021-12-15 23:03:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:03:40,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1440550631, now seen corresponding path program 1 times [2021-12-15 23:03:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:40,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472119952] [2021-12-15 23:03:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 23:03:40,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:40,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472119952] [2021-12-15 23:03:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472119952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:40,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926289706] [2021-12-15 23:03:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:40,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:40,942 INFO L87 Difference]: Start difference. First operand 26568 states and 29701 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:42,322 INFO L93 Difference]: Finished difference Result 64200 states and 72104 transitions. [2021-12-15 23:03:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 383 [2021-12-15 23:03:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:42,357 INFO L225 Difference]: With dead ends: 64200 [2021-12-15 23:03:42,358 INFO L226 Difference]: Without dead ends: 35082 [2021-12-15 23:03:42,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:42,377 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 288 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:42,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 742 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 23:03:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35082 states. [2021-12-15 23:03:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35082 to 29531. [2021-12-15 23:03:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29531 states, 29530 states have (on average 1.1009820521503555) internal successors, (32512), 29530 states have internal predecessors, (32512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29531 states to 29531 states and 32512 transitions. [2021-12-15 23:03:42,775 INFO L78 Accepts]: Start accepts. Automaton has 29531 states and 32512 transitions. Word has length 383 [2021-12-15 23:03:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 29531 states and 32512 transitions. [2021-12-15 23:03:42,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29531 states and 32512 transitions. [2021-12-15 23:03:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-12-15 23:03:42,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:42,785 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:42,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:03:42,786 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1027671709, now seen corresponding path program 1 times [2021-12-15 23:03:42,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:42,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77888147] [2021-12-15 23:03:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:42,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 23:03:42,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77888147] [2021-12-15 23:03:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77888147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:42,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973626064] [2021-12-15 23:03:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:42,889 INFO L87 Difference]: Start difference. First operand 29531 states and 32512 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:44,491 INFO L93 Difference]: Finished difference Result 67601 states and 74480 transitions. [2021-12-15 23:03:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 408 [2021-12-15 23:03:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:44,533 INFO L225 Difference]: With dead ends: 67601 [2021-12-15 23:03:44,533 INFO L226 Difference]: Without dead ends: 38072 [2021-12-15 23:03:44,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:44,557 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 466 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:44,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 169 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:03:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38072 states. [2021-12-15 23:03:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38072 to 29954. [2021-12-15 23:03:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29954 states, 29953 states have (on average 1.100557540146229) internal successors, (32965), 29953 states have internal predecessors, (32965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29954 states to 29954 states and 32965 transitions. [2021-12-15 23:03:44,995 INFO L78 Accepts]: Start accepts. Automaton has 29954 states and 32965 transitions. Word has length 408 [2021-12-15 23:03:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:44,997 INFO L470 AbstractCegarLoop]: Abstraction has 29954 states and 32965 transitions. [2021-12-15 23:03:44,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 29954 states and 32965 transitions. [2021-12-15 23:03:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-15 23:03:45,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:45,024 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:45,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 23:03:45,025 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1665160821, now seen corresponding path program 1 times [2021-12-15 23:03:45,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966058976] [2021-12-15 23:03:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:45,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:45,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966058976] [2021-12-15 23:03:45,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966058976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837325628] [2021-12-15 23:03:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:45,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:45,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:03:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:03:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:03:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 118 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:46,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 316 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:47,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837325628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:03:47,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 23:03:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 23:03:47,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451193087] [2021-12-15 23:03:47,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 23:03:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 23:03:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 23:03:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 23:03:47,209 INFO L87 Difference]: Start difference. First operand 29954 states and 32965 transitions. Second operand has 10 states, 10 states have (on average 103.7) internal successors, (1037), 9 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:53,240 INFO L93 Difference]: Finished difference Result 88887 states and 97579 transitions. [2021-12-15 23:03:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 23:03:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 9 states have internal predecessors, (1037), 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 519 [2021-12-15 23:03:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:53,301 INFO L225 Difference]: With dead ends: 88887 [2021-12-15 23:03:53,302 INFO L226 Difference]: Without dead ends: 57660 [2021-12-15 23:03:53,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1031 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 23:03:53,318 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2684 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 7614 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 8230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 7614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2684 Valid, 477 Invalid, 8230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 7614 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 23:03:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57660 states. [2021-12-15 23:03:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57660 to 36362. [2021-12-15 23:03:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36362 states, 36361 states have (on average 1.0971920464233658) internal successors, (39895), 36361 states have internal predecessors, (39895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36362 states to 36362 states and 39895 transitions. [2021-12-15 23:03:53,821 INFO L78 Accepts]: Start accepts. Automaton has 36362 states and 39895 transitions. Word has length 519 [2021-12-15 23:03:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:53,822 INFO L470 AbstractCegarLoop]: Abstraction has 36362 states and 39895 transitions. [2021-12-15 23:03:53,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 9 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36362 states and 39895 transitions. [2021-12-15 23:03:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2021-12-15 23:03:53,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:53,844 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:53,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:54,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 23:03:54,061 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:54,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1435012347, now seen corresponding path program 1 times [2021-12-15 23:03:54,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019495085] [2021-12-15 23:03:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:54,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 23:03:54,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019495085] [2021-12-15 23:03:54,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019495085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:54,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:54,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:54,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963531313] [2021-12-15 23:03:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:54,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:54,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:54,263 INFO L87 Difference]: Start difference. First operand 36362 states and 39895 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 2 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:55,322 INFO L93 Difference]: Finished difference Result 71439 states and 78401 transitions. [2021-12-15 23:03:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 2 states have internal predecessors, (408), 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 635 [2021-12-15 23:03:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:55,359 INFO L225 Difference]: With dead ends: 71439 [2021-12-15 23:03:55,359 INFO L226 Difference]: Without dead ends: 35503 [2021-12-15 23:03:55,371 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:03:55,377 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 413 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:55,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 104 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 23:03:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35503 states. [2021-12-15 23:03:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35503 to 35497. [2021-12-15 23:03:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35497 states, 35496 states have (on average 1.0962361956276763) internal successors, (38912), 35496 states have internal predecessors, (38912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35497 states to 35497 states and 38912 transitions. [2021-12-15 23:03:55,700 INFO L78 Accepts]: Start accepts. Automaton has 35497 states and 38912 transitions. Word has length 635 [2021-12-15 23:03:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:55,701 INFO L470 AbstractCegarLoop]: Abstraction has 35497 states and 38912 transitions. [2021-12-15 23:03:55,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 2 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35497 states and 38912 transitions. [2021-12-15 23:03:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-12-15 23:03:55,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:55,719 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:55,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:03:55,719 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1650487390, now seen corresponding path program 1 times [2021-12-15 23:03:55,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:55,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634207046] [2021-12-15 23:03:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:55,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 23:03:56,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634207046] [2021-12-15 23:03:56,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634207046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:56,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:56,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:56,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75679271] [2021-12-15 23:03:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:56,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:56,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:56,054 INFO L87 Difference]: Start difference. First operand 35497 states and 38912 transitions. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:57,626 INFO L93 Difference]: Finished difference Result 80344 states and 88597 transitions. [2021-12-15 23:03:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 661 [2021-12-15 23:03:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:57,676 INFO L225 Difference]: With dead ends: 80344 [2021-12-15 23:03:57,676 INFO L226 Difference]: Without dead ends: 45274 [2021-12-15 23:03:57,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:57,699 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 439 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:57,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 362 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:03:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45274 states. [2021-12-15 23:03:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45274 to 42720. [2021-12-15 23:03:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42720 states, 42719 states have (on average 1.0914113158079544) internal successors, (46624), 42719 states have internal predecessors, (46624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42720 states to 42720 states and 46624 transitions. [2021-12-15 23:03:58,227 INFO L78 Accepts]: Start accepts. Automaton has 42720 states and 46624 transitions. Word has length 661 [2021-12-15 23:03:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 42720 states and 46624 transitions. [2021-12-15 23:03:58,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 42720 states and 46624 transitions. [2021-12-15 23:03:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2021-12-15 23:03:58,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:58,332 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:58,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:03:58,332 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1090791905, now seen corresponding path program 1 times [2021-12-15 23:03:58,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521430312] [2021-12-15 23:03:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:58,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 841 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-15 23:03:58,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521430312] [2021-12-15 23:03:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521430312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:58,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:58,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:03:58,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293226692] [2021-12-15 23:03:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:58,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:58,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:58,576 INFO L87 Difference]: Start difference. First operand 42720 states and 46624 transitions. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:01,125 INFO L93 Difference]: Finished difference Result 102929 states and 112737 transitions. [2021-12-15 23:04:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:04:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 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 698 [2021-12-15 23:04:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:01,198 INFO L225 Difference]: With dead ends: 102929 [2021-12-15 23:04:01,198 INFO L226 Difference]: Without dead ends: 60636 [2021-12-15 23:04:01,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:04:01,231 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 825 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:01,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 180 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:04:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60636 states. [2021-12-15 23:04:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60636 to 56374. [2021-12-15 23:04:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56374 states, 56373 states have (on average 1.100172068188672) internal successors, (62020), 56373 states have internal predecessors, (62020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56374 states to 56374 states and 62020 transitions. [2021-12-15 23:04:01,967 INFO L78 Accepts]: Start accepts. Automaton has 56374 states and 62020 transitions. Word has length 698 [2021-12-15 23:04:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:04:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 56374 states and 62020 transitions. [2021-12-15 23:04:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 56374 states and 62020 transitions. [2021-12-15 23:04:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2021-12-15 23:04:01,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:01,984 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:01,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:04:01,984 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1339675404, now seen corresponding path program 1 times [2021-12-15 23:04:01,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:01,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095863001] [2021-12-15 23:04:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:01,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 778 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-12-15 23:04:02,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095863001] [2021-12-15 23:04:02,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095863001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:02,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:02,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:02,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361797451] [2021-12-15 23:04:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:02,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:02,123 INFO L87 Difference]: Start difference. First operand 56374 states and 62020 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:03,871 INFO L93 Difference]: Finished difference Result 124676 states and 137552 transitions. [2021-12-15 23:04:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:04:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 699 [2021-12-15 23:04:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:03,948 INFO L225 Difference]: With dead ends: 124676 [2021-12-15 23:04:03,948 INFO L226 Difference]: Without dead ends: 66171 [2021-12-15 23:04:03,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:03,981 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 431 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:03,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 594 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:04:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66171 states. [2021-12-15 23:04:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66171 to 64461. [2021-12-15 23:04:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64461 states, 64460 states have (on average 1.099922432516289) internal successors, (70901), 64460 states have internal predecessors, (70901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64461 states to 64461 states and 70901 transitions. [2021-12-15 23:04:04,927 INFO L78 Accepts]: Start accepts. Automaton has 64461 states and 70901 transitions. Word has length 699 [2021-12-15 23:04:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:04:04,927 INFO L470 AbstractCegarLoop]: Abstraction has 64461 states and 70901 transitions. [2021-12-15 23:04:04,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 64461 states and 70901 transitions. [2021-12-15 23:04:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2021-12-15 23:04:04,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:04,947 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:04,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:04:04,947 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 448649391, now seen corresponding path program 1 times [2021-12-15 23:04:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96251819] [2021-12-15 23:04:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:04,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1022 backedges. 750 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 23:04:05,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96251819] [2021-12-15 23:04:05,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96251819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:05,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:05,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753538276] [2021-12-15 23:04:05,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:05,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:05,424 INFO L87 Difference]: Start difference. First operand 64461 states and 70901 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:07,037 INFO L93 Difference]: Finished difference Result 131048 states and 144049 transitions. [2021-12-15 23:04:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:04:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 718 [2021-12-15 23:04:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:07,120 INFO L225 Difference]: With dead ends: 131048 [2021-12-15 23:04:07,120 INFO L226 Difference]: Without dead ends: 67014 [2021-12-15 23:04:07,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:07,149 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 114 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:07,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 781 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 23:04:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67014 states. [2021-12-15 23:04:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67014 to 66586. [2021-12-15 23:04:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66586 states, 66585 states have (on average 1.0968386273184652) internal successors, (73033), 66585 states have internal predecessors, (73033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66586 states to 66586 states and 73033 transitions. [2021-12-15 23:04:07,960 INFO L78 Accepts]: Start accepts. Automaton has 66586 states and 73033 transitions. Word has length 718 [2021-12-15 23:04:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:04:07,960 INFO L470 AbstractCegarLoop]: Abstraction has 66586 states and 73033 transitions. [2021-12-15 23:04:07,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 66586 states and 73033 transitions. [2021-12-15 23:04:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2021-12-15 23:04:07,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:07,979 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:07,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 23:04:07,979 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 345824951, now seen corresponding path program 1 times [2021-12-15 23:04:07,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:07,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756567404] [2021-12-15 23:04:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:07,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 817 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-15 23:04:08,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756567404] [2021-12-15 23:04:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756567404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:08,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:08,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:08,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356599258] [2021-12-15 23:04:08,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:08,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:08,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:08,126 INFO L87 Difference]: Start difference. First operand 66586 states and 73033 transitions. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:10,013 INFO L93 Difference]: Finished difference Result 151464 states and 166277 transitions. [2021-12-15 23:04:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:04:10,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 722 [2021-12-15 23:04:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:10,106 INFO L225 Difference]: With dead ends: 151464 [2021-12-15 23:04:10,106 INFO L226 Difference]: Without dead ends: 85305 [2021-12-15 23:04:10,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:10,139 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 396 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:10,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 264 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:04:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85305 states. [2021-12-15 23:04:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85305 to 82324. [2021-12-15 23:04:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82324 states, 82323 states have (on average 1.089731909672874) internal successors, (89710), 82323 states have internal predecessors, (89710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82324 states to 82324 states and 89710 transitions. [2021-12-15 23:04:11,052 INFO L78 Accepts]: Start accepts. Automaton has 82324 states and 89710 transitions. Word has length 722 [2021-12-15 23:04:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:04:11,053 INFO L470 AbstractCegarLoop]: Abstraction has 82324 states and 89710 transitions. [2021-12-15 23:04:11,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 82324 states and 89710 transitions. [2021-12-15 23:04:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2021-12-15 23:04:11,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:11,077 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:11,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 23:04:11,077 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash -152065236, now seen corresponding path program 1 times [2021-12-15 23:04:11,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:11,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525822074] [2021-12-15 23:04:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:11,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 785 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-15 23:04:11,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525822074] [2021-12-15 23:04:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525822074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:11,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:11,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:11,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901870381] [2021-12-15 23:04:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:11,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:11,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:11,453 INFO L87 Difference]: Start difference. First operand 82324 states and 89710 transitions. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:13,152 INFO L93 Difference]: Finished difference Result 168472 states and 183279 transitions. [2021-12-15 23:04:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:04:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 752 [2021-12-15 23:04:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:13,259 INFO L225 Difference]: With dead ends: 168472 [2021-12-15 23:04:13,259 INFO L226 Difference]: Without dead ends: 86575 [2021-12-15 23:04:13,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:13,300 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 126 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:13,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 745 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 23:04:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86575 states. [2021-12-15 23:04:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86575 to 86572. [2021-12-15 23:04:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86572 states, 86571 states have (on average 1.0804426424553257) internal successors, (93535), 86571 states have internal predecessors, (93535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86572 states to 86572 states and 93535 transitions. [2021-12-15 23:04:14,270 INFO L78 Accepts]: Start accepts. Automaton has 86572 states and 93535 transitions. Word has length 752 [2021-12-15 23:04:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:04:14,270 INFO L470 AbstractCegarLoop]: Abstraction has 86572 states and 93535 transitions. [2021-12-15 23:04:14,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 86572 states and 93535 transitions. [2021-12-15 23:04:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2021-12-15 23:04:14,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:04:14,323 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:04:14,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 23:04:14,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:04:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:04:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1102994304, now seen corresponding path program 1 times [2021-12-15 23:04:14,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:04:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978652205] [2021-12-15 23:04:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:04:14,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:04:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1835 backedges. 841 proven. 0 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-12-15 23:04:14,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:14,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978652205] [2021-12-15 23:04:14,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978652205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:14,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:14,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032003020] [2021-12-15 23:04:14,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:14,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:14,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:14,744 INFO L87 Difference]: Start difference. First operand 86572 states and 93535 transitions. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)