./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.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/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash acd9e872db1fd43c4a46d62b416714fdbb0fdc4944c5c8838fbbff5e8b72009f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:14:33,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:14:33,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:14:33,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:14:33,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:14:33,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:14:33,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:14:34,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:14:34,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:14:34,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:14:34,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:14:34,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:14:34,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:14:34,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:14:34,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:14:34,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:14:34,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:14:34,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:14:34,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:14:34,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:14:34,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:14:34,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:14:34,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:14:34,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:14:34,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:14:34,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:14:34,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:14:34,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:14:34,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:14:34,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:14:34,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:14:34,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:14:34,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:14:34,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:14:34,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:14:34,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:14:34,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:14:34,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:14:34,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:14:34,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:14:34,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:14:34,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:14:34,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:14:34,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:14:34,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:14:34,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:14:34,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:14:34,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:14:34,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:14:34,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:14:34,096 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:14:34,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:14:34,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:14:34,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:14:34,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:14:34,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:14:34,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:14:34,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:14:34,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:14:34,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:14:34,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:14:34,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:14:34,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:14:34,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:14:34,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:14:34,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:14:34,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:14:34,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:14:34,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:14:34,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:14:34,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:14:34,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:14:34,101 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:14:34,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:14:34,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:14:34,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:14:34,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acd9e872db1fd43c4a46d62b416714fdbb0fdc4944c5c8838fbbff5e8b72009f [2021-12-16 01:14:34,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:14:34,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:14:34,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:14:34,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:14:34,335 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:14:34,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c [2021-12-16 01:14:34,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb3f00ee/90d63e23b43d4cfcab51b9f97ecd4daa/FLAG7350da9cd [2021-12-16 01:14:34,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:14:34,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c [2021-12-16 01:14:34,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb3f00ee/90d63e23b43d4cfcab51b9f97ecd4daa/FLAG7350da9cd [2021-12-16 01:14:35,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb3f00ee/90d63e23b43d4cfcab51b9f97ecd4daa [2021-12-16 01:14:35,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:14:35,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:14:35,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:14:35,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:14:35,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:14:35,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c37f51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35, skipping insertion in model container [2021-12-16 01:14:35,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:14:35,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:14:35,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c[11261,11274] [2021-12-16 01:14:35,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:14:35,441 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:14:35,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c[11261,11274] [2021-12-16 01:14:35,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:14:35,499 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:14:35,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35 WrapperNode [2021-12-16 01:14:35,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:14:35,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:14:35,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:14:35,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:14:35,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,547 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 331 [2021-12-16 01:14:35,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:14:35,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:14:35,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:14:35,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:14:35,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:14:35,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:14:35,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:14:35,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:14:35,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (1/1) ... [2021-12-16 01:14:35,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:14:35,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:14:35,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 01:14:35,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 01:14:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:14:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:14:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:14:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:14:35,799 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:14:35,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:14:36,114 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:14:36,121 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:14:36,121 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 01:14:36,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:14:36 BoogieIcfgContainer [2021-12-16 01:14:36,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:14:36,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:14:36,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:14:36,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:14:36,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:14:35" (1/3) ... [2021-12-16 01:14:36,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52234623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:14:36, skipping insertion in model container [2021-12-16 01:14:36,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:14:35" (2/3) ... [2021-12-16 01:14:36,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52234623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:14:36, skipping insertion in model container [2021-12-16 01:14:36,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:14:36" (3/3) ... [2021-12-16 01:14:36,131 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c [2021-12-16 01:14:36,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:14:36,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:14:36,174 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:14:36,181 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 01:14:36,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:14:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 94 states have internal predecessors, (160), 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) [2021-12-16 01:14:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 01:14:36,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:36,201 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] [2021-12-16 01:14:36,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -176333024, now seen corresponding path program 1 times [2021-12-16 01:14:36,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941838282] [2021-12-16 01:14:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:36,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:36,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941838282] [2021-12-16 01:14:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941838282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:36,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:36,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 01:14:36,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312594659] [2021-12-16 01:14:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:36,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 01:14:36,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 01:14:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:14:36,452 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 94 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2021-12-16 01:14:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:36,483 INFO L93 Difference]: Finished difference Result 150 states and 249 transitions. [2021-12-16 01:14:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 01:14:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2021-12-16 01:14:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:36,493 INFO L225 Difference]: With dead ends: 150 [2021-12-16 01:14:36,493 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 01:14:36,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:14:36,501 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:36,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 01:14:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-16 01:14:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.7) internal successors, (153), 90 states have internal predecessors, (153), 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) [2021-12-16 01:14:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 153 transitions. [2021-12-16 01:14:36,534 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 153 transitions. Word has length 33 [2021-12-16 01:14:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:36,535 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 153 transitions. [2021-12-16 01:14:36,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2021-12-16 01:14:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 153 transitions. [2021-12-16 01:14:36,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 01:14:36,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:36,538 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] [2021-12-16 01:14:36,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:14:36,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash -685806114, now seen corresponding path program 1 times [2021-12-16 01:14:36,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108400493] [2021-12-16 01:14:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:36,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:36,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:36,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108400493] [2021-12-16 01:14:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108400493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:36,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:36,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:14:36,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146721743] [2021-12-16 01:14:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:36,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:14:36,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:14:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:14:36,726 INFO L87 Difference]: Start difference. First operand 91 states and 153 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-12-16 01:14:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:36,817 INFO L93 Difference]: Finished difference Result 149 states and 242 transitions. [2021-12-16 01:14:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:14:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-12-16 01:14:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:36,819 INFO L225 Difference]: With dead ends: 149 [2021-12-16 01:14:36,820 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 01:14:36,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:36,822 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 3 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:36,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 570 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 01:14:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-16 01:14:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 90 states have internal predecessors, (122), 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) [2021-12-16 01:14:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2021-12-16 01:14:36,834 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 33 [2021-12-16 01:14:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:36,835 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2021-12-16 01:14:36,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-12-16 01:14:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2021-12-16 01:14:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 01:14:36,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:36,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:36,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:14:36,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 803903125, now seen corresponding path program 1 times [2021-12-16 01:14:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739392017] [2021-12-16 01:14:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:36,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:36,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:36,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739392017] [2021-12-16 01:14:36,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739392017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:36,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:36,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:36,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497317822] [2021-12-16 01:14:36,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:36,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:36,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:36,959 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-16 01:14:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:36,987 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2021-12-16 01:14:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:36,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-16 01:14:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:36,995 INFO L225 Difference]: With dead ends: 193 [2021-12-16 01:14:36,995 INFO L226 Difference]: Without dead ends: 139 [2021-12-16 01:14:36,996 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 [2021-12-16 01:14:36,997 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:36,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 264 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-16 01:14:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-12-16 01:14:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4338235294117647) internal successors, (195), 136 states have internal predecessors, (195), 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) [2021-12-16 01:14:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 195 transitions. [2021-12-16 01:14:37,007 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 195 transitions. Word has length 63 [2021-12-16 01:14:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:37,008 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 195 transitions. [2021-12-16 01:14:37,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-16 01:14:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 195 transitions. [2021-12-16 01:14:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 01:14:37,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:37,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:14:37,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1136127733, now seen corresponding path program 1 times [2021-12-16 01:14:37,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:37,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319395051] [2021-12-16 01:14:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:37,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:37,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:37,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319395051] [2021-12-16 01:14:37,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319395051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:37,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:37,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:37,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843683568] [2021-12-16 01:14:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:37,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:37,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:37,097 INFO L87 Difference]: Start difference. First operand 137 states and 195 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-16 01:14:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:37,122 INFO L93 Difference]: Finished difference Result 325 states and 491 transitions. [2021-12-16 01:14:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-16 01:14:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:37,126 INFO L225 Difference]: With dead ends: 325 [2021-12-16 01:14:37,127 INFO L226 Difference]: Without dead ends: 225 [2021-12-16 01:14:37,127 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 [2021-12-16 01:14:37,128 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 67 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:37,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-16 01:14:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2021-12-16 01:14:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 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) [2021-12-16 01:14:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 330 transitions. [2021-12-16 01:14:37,147 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 330 transitions. Word has length 63 [2021-12-16 01:14:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:37,154 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 330 transitions. [2021-12-16 01:14:37,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-16 01:14:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 330 transitions. [2021-12-16 01:14:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 01:14:37,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:37,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:14:37,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1564554881, now seen corresponding path program 1 times [2021-12-16 01:14:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200229083] [2021-12-16 01:14:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:37,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:37,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:37,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200229083] [2021-12-16 01:14:37,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200229083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:37,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:37,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:37,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441557329] [2021-12-16 01:14:37,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:37,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:37,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:37,245 INFO L87 Difference]: Start difference. First operand 223 states and 330 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2021-12-16 01:14:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:37,493 INFO L93 Difference]: Finished difference Result 2083 states and 3260 transitions. [2021-12-16 01:14:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 01:14:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2021-12-16 01:14:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:37,502 INFO L225 Difference]: With dead ends: 2083 [2021-12-16 01:14:37,502 INFO L226 Difference]: Without dead ends: 1897 [2021-12-16 01:14:37,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:14:37,512 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1361 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:37,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1223 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-12-16 01:14:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 407. [2021-12-16 01:14:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5123152709359606) internal successors, (614), 406 states have internal predecessors, (614), 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) [2021-12-16 01:14:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 614 transitions. [2021-12-16 01:14:37,565 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 614 transitions. Word has length 63 [2021-12-16 01:14:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:37,568 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 614 transitions. [2021-12-16 01:14:37,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2021-12-16 01:14:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 614 transitions. [2021-12-16 01:14:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 01:14:37,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:37,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:14:37,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1117008495, now seen corresponding path program 1 times [2021-12-16 01:14:37,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:37,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214313509] [2021-12-16 01:14:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:37,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:37,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:37,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214313509] [2021-12-16 01:14:37,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214313509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:37,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:37,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653339041] [2021-12-16 01:14:37,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:37,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:37,671 INFO L87 Difference]: Start difference. First operand 407 states and 614 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:37,706 INFO L93 Difference]: Finished difference Result 1103 states and 1692 transitions. [2021-12-16 01:14:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-12-16 01:14:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:37,710 INFO L225 Difference]: With dead ends: 1103 [2021-12-16 01:14:37,710 INFO L226 Difference]: Without dead ends: 733 [2021-12-16 01:14:37,712 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 [2021-12-16 01:14:37,714 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 50 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:37,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-16 01:14:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 723. [2021-12-16 01:14:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.5041551246537397) internal successors, (1086), 722 states have internal predecessors, (1086), 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) [2021-12-16 01:14:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1086 transitions. [2021-12-16 01:14:37,744 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1086 transitions. Word has length 65 [2021-12-16 01:14:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:37,744 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1086 transitions. [2021-12-16 01:14:37,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1086 transitions. [2021-12-16 01:14:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 01:14:37,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:37,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:37,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:14:37,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1050514983, now seen corresponding path program 1 times [2021-12-16 01:14:37,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362535591] [2021-12-16 01:14:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:37,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:37,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362535591] [2021-12-16 01:14:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362535591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:37,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:37,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:37,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910294636] [2021-12-16 01:14:37,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:37,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:37,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:37,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:37,919 INFO L87 Difference]: Start difference. First operand 723 states and 1086 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:38,082 INFO L93 Difference]: Finished difference Result 1411 states and 2136 transitions. [2021-12-16 01:14:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 65 [2021-12-16 01:14:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:38,086 INFO L225 Difference]: With dead ends: 1411 [2021-12-16 01:14:38,086 INFO L226 Difference]: Without dead ends: 725 [2021-12-16 01:14:38,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:14:38,087 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 454 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:38,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 462 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-16 01:14:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 723. [2021-12-16 01:14:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.4930747922437673) internal successors, (1078), 722 states have internal predecessors, (1078), 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) [2021-12-16 01:14:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1078 transitions. [2021-12-16 01:14:38,113 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1078 transitions. Word has length 65 [2021-12-16 01:14:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1078 transitions. [2021-12-16 01:14:38,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1078 transitions. [2021-12-16 01:14:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 01:14:38,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:38,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:14:38,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash 738399093, now seen corresponding path program 1 times [2021-12-16 01:14:38,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073066911] [2021-12-16 01:14:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:38,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073066911] [2021-12-16 01:14:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073066911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:38,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:38,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107234563] [2021-12-16 01:14:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:38,149 INFO L87 Difference]: Start difference. First operand 723 states and 1078 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:38,195 INFO L93 Difference]: Finished difference Result 1999 states and 3000 transitions. [2021-12-16 01:14:38,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-12-16 01:14:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:38,200 INFO L225 Difference]: With dead ends: 1999 [2021-12-16 01:14:38,200 INFO L226 Difference]: Without dead ends: 1313 [2021-12-16 01:14:38,201 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 [2021-12-16 01:14:38,202 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 59 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:38,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-12-16 01:14:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1311. [2021-12-16 01:14:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.4824427480916031) internal successors, (1942), 1310 states have internal predecessors, (1942), 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) [2021-12-16 01:14:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1942 transitions. [2021-12-16 01:14:38,255 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1942 transitions. Word has length 65 [2021-12-16 01:14:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:38,256 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1942 transitions. [2021-12-16 01:14:38,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1942 transitions. [2021-12-16 01:14:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 01:14:38,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:38,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:38,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:14:38,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1985906709, now seen corresponding path program 1 times [2021-12-16 01:14:38,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:38,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182287055] [2021-12-16 01:14:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:38,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:38,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:38,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182287055] [2021-12-16 01:14:38,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182287055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:38,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:38,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:38,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855349256] [2021-12-16 01:14:38,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:38,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:38,310 INFO L87 Difference]: Start difference. First operand 1311 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:38,389 INFO L93 Difference]: Finished difference Result 3667 states and 5432 transitions. [2021-12-16 01:14:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:38,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-12-16 01:14:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:38,398 INFO L225 Difference]: With dead ends: 3667 [2021-12-16 01:14:38,398 INFO L226 Difference]: Without dead ends: 2393 [2021-12-16 01:14:38,399 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 [2021-12-16 01:14:38,402 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 63 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:38,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-12-16 01:14:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2021-12-16 01:14:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 1.4619246861924686) internal successors, (3494), 2390 states have internal predecessors, (3494), 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) [2021-12-16 01:14:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3494 transitions. [2021-12-16 01:14:38,497 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3494 transitions. Word has length 65 [2021-12-16 01:14:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:38,497 INFO L470 AbstractCegarLoop]: Abstraction has 2391 states and 3494 transitions. [2021-12-16 01:14:38,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-12-16 01:14:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3494 transitions. [2021-12-16 01:14:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 01:14:38,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:38,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:38,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:14:38,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1379050855, now seen corresponding path program 1 times [2021-12-16 01:14:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:38,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218029299] [2021-12-16 01:14:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:38,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:38,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218029299] [2021-12-16 01:14:38,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218029299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:38,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:38,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:14:38,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714014683] [2021-12-16 01:14:38,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:38,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:14:38,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:14:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:14:38,575 INFO L87 Difference]: Start difference. First operand 2391 states and 3494 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:14:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:38,749 INFO L93 Difference]: Finished difference Result 4149 states and 6028 transitions. [2021-12-16 01:14:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:38,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-16 01:14:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:38,764 INFO L225 Difference]: With dead ends: 4149 [2021-12-16 01:14:38,765 INFO L226 Difference]: Without dead ends: 4147 [2021-12-16 01:14:38,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:14:38,768 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 225 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:38,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 535 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-12-16 01:14:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 2487. [2021-12-16 01:14:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.4376508447304908) internal successors, (3574), 2486 states have internal predecessors, (3574), 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) [2021-12-16 01:14:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3574 transitions. [2021-12-16 01:14:38,905 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3574 transitions. Word has length 66 [2021-12-16 01:14:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:38,906 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3574 transitions. [2021-12-16 01:14:38,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:14:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3574 transitions. [2021-12-16 01:14:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 01:14:38,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:38,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:14:38,909 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1091422096, now seen corresponding path program 1 times [2021-12-16 01:14:38,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:38,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662630159] [2021-12-16 01:14:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:38,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:38,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:38,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662630159] [2021-12-16 01:14:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662630159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:38,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:38,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:38,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523931987] [2021-12-16 01:14:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:38,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:38,951 INFO L87 Difference]: Start difference. First operand 2487 states and 3574 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-12-16 01:14:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:39,084 INFO L93 Difference]: Finished difference Result 4990 states and 7228 transitions. [2021-12-16 01:14:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-12-16 01:14:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:39,096 INFO L225 Difference]: With dead ends: 4990 [2021-12-16 01:14:39,096 INFO L226 Difference]: Without dead ends: 3611 [2021-12-16 01:14:39,098 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 [2021-12-16 01:14:39,099 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 72 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:39,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 269 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-12-16 01:14:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 3609. [2021-12-16 01:14:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3608 states have (on average 1.4301552106430155) internal successors, (5160), 3608 states have internal predecessors, (5160), 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) [2021-12-16 01:14:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5160 transitions. [2021-12-16 01:14:39,262 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5160 transitions. Word has length 67 [2021-12-16 01:14:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 5160 transitions. [2021-12-16 01:14:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-12-16 01:14:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5160 transitions. [2021-12-16 01:14:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 01:14:39,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:39,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:39,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:14:39,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:39,266 INFO L85 PathProgramCache]: Analyzing trace with hash 291374621, now seen corresponding path program 1 times [2021-12-16 01:14:39,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:39,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484431650] [2021-12-16 01:14:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:39,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 01:14:39,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484431650] [2021-12-16 01:14:39,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484431650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:39,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:39,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:39,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413269111] [2021-12-16 01:14:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:39,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:39,344 INFO L87 Difference]: Start difference. First operand 3609 states and 5160 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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) [2021-12-16 01:14:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:40,025 INFO L93 Difference]: Finished difference Result 22181 states and 31758 transitions. [2021-12-16 01:14:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:40,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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 94 [2021-12-16 01:14:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:40,096 INFO L225 Difference]: With dead ends: 22181 [2021-12-16 01:14:40,096 INFO L226 Difference]: Without dead ends: 18611 [2021-12-16 01:14:40,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:14:40,108 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 881 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:40,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 693 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18611 states. [2021-12-16 01:14:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18611 to 7177. [2021-12-16 01:14:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 1.4258639910813824) internal successors, (10232), 7176 states have internal predecessors, (10232), 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) [2021-12-16 01:14:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10232 transitions. [2021-12-16 01:14:40,564 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10232 transitions. Word has length 94 [2021-12-16 01:14:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:40,565 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 10232 transitions. [2021-12-16 01:14:40,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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) [2021-12-16 01:14:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10232 transitions. [2021-12-16 01:14:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 01:14:40,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:40,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:40,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:14:40,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1538882237, now seen corresponding path program 1 times [2021-12-16 01:14:40,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721144804] [2021-12-16 01:14:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:40,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 01:14:40,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:40,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721144804] [2021-12-16 01:14:40,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721144804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:40,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:40,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249135463] [2021-12-16 01:14:40,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:40,652 INFO L87 Difference]: Start difference. First operand 7177 states and 10232 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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) [2021-12-16 01:14:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:41,425 INFO L93 Difference]: Finished difference Result 25749 states and 36830 transitions. [2021-12-16 01:14:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 94 [2021-12-16 01:14:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:41,502 INFO L225 Difference]: With dead ends: 25749 [2021-12-16 01:14:41,502 INFO L226 Difference]: Without dead ends: 22179 [2021-12-16 01:14:41,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:14:41,511 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 765 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:41,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 766 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2021-12-16 01:14:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 12537. [2021-12-16 01:14:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 12536 states have (on average 1.419910657306956) internal successors, (17800), 12536 states have internal predecessors, (17800), 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) [2021-12-16 01:14:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 17800 transitions. [2021-12-16 01:14:42,101 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 17800 transitions. Word has length 94 [2021-12-16 01:14:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:42,102 INFO L470 AbstractCegarLoop]: Abstraction has 12537 states and 17800 transitions. [2021-12-16 01:14:42,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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) [2021-12-16 01:14:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 17800 transitions. [2021-12-16 01:14:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 01:14:42,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:42,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:42,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:14:42,107 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1286652077, now seen corresponding path program 1 times [2021-12-16 01:14:42,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635871241] [2021-12-16 01:14:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:42,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:14:42,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635871241] [2021-12-16 01:14:42,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635871241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:42,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:42,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:42,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172898478] [2021-12-16 01:14:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:42,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:42,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:42,177 INFO L87 Difference]: Start difference. First operand 12537 states and 17800 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-12-16 01:14:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:42,971 INFO L93 Difference]: Finished difference Result 29317 states and 41902 transitions. [2021-12-16 01:14:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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 94 [2021-12-16 01:14:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:43,025 INFO L225 Difference]: With dead ends: 29317 [2021-12-16 01:14:43,025 INFO L226 Difference]: Without dead ends: 25747 [2021-12-16 01:14:43,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:14:43,039 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 782 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:43,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 779 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25747 states. [2021-12-16 01:14:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25747 to 16105. [2021-12-16 01:14:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16105 states, 16104 states have (on average 1.42026825633383) internal successors, (22872), 16104 states have internal predecessors, (22872), 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) [2021-12-16 01:14:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16105 states to 16105 states and 22872 transitions. [2021-12-16 01:14:43,725 INFO L78 Accepts]: Start accepts. Automaton has 16105 states and 22872 transitions. Word has length 94 [2021-12-16 01:14:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:43,726 INFO L470 AbstractCegarLoop]: Abstraction has 16105 states and 22872 transitions. [2021-12-16 01:14:43,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-12-16 01:14:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 16105 states and 22872 transitions. [2021-12-16 01:14:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-16 01:14:43,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:43,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:43,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:14:43,731 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1772856179, now seen corresponding path program 1 times [2021-12-16 01:14:43,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12946703] [2021-12-16 01:14:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:43,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 01:14:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12946703] [2021-12-16 01:14:43,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12946703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:43,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:43,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:43,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592049562] [2021-12-16 01:14:43,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:43,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:43,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:43,795 INFO L87 Difference]: Start difference. First operand 16105 states and 22872 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2021-12-16 01:14:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:44,753 INFO L93 Difference]: Finished difference Result 32885 states and 46974 transitions. [2021-12-16 01:14:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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 94 [2021-12-16 01:14:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:44,795 INFO L225 Difference]: With dead ends: 32885 [2021-12-16 01:14:44,796 INFO L226 Difference]: Without dead ends: 29315 [2021-12-16 01:14:44,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:14:44,809 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 856 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:44,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 781 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29315 states. [2021-12-16 01:14:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29315 to 19673. [2021-12-16 01:14:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19673 states, 19672 states have (on average 1.420496136640911) internal successors, (27944), 19672 states have internal predecessors, (27944), 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) [2021-12-16 01:14:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19673 states to 19673 states and 27944 transitions. [2021-12-16 01:14:45,771 INFO L78 Accepts]: Start accepts. Automaton has 19673 states and 27944 transitions. Word has length 94 [2021-12-16 01:14:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:45,771 INFO L470 AbstractCegarLoop]: Abstraction has 19673 states and 27944 transitions. [2021-12-16 01:14:45,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2021-12-16 01:14:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 19673 states and 27944 transitions. [2021-12-16 01:14:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 01:14:45,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:45,777 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 01:14:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:14:45,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1846336056, now seen corresponding path program 1 times [2021-12-16 01:14:45,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153028332] [2021-12-16 01:14:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:45,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:14:45,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153028332] [2021-12-16 01:14:45,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153028332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:45,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:14:45,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141053326] [2021-12-16 01:14:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:14:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:14:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:14:45,845 INFO L87 Difference]: Start difference. First operand 19673 states and 27944 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2021-12-16 01:14:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:46,927 INFO L93 Difference]: Finished difference Result 34309 states and 49038 transitions. [2021-12-16 01:14:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:14:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 96 [2021-12-16 01:14:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:46,961 INFO L225 Difference]: With dead ends: 34309 [2021-12-16 01:14:46,961 INFO L226 Difference]: Without dead ends: 31811 [2021-12-16 01:14:46,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:14:46,984 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 846 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:46,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 724 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:14:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31811 states. [2021-12-16 01:14:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31811 to 22169. [2021-12-16 01:14:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 1.4222302417899675) internal successors, (31528), 22168 states have internal predecessors, (31528), 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) [2021-12-16 01:14:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 31528 transitions. [2021-12-16 01:14:47,953 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 31528 transitions. Word has length 96 [2021-12-16 01:14:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:47,954 INFO L470 AbstractCegarLoop]: Abstraction has 22169 states and 31528 transitions. [2021-12-16 01:14:47,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2021-12-16 01:14:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 31528 transitions. [2021-12-16 01:14:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 01:14:47,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:47,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:14:47,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:14:47,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -511065483, now seen corresponding path program 1 times [2021-12-16 01:14:47,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:47,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472015308] [2021-12-16 01:14:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:47,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:48,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:48,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472015308] [2021-12-16 01:14:48,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472015308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:48,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:48,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:48,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683913753] [2021-12-16 01:14:48,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:48,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:48,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:48,022 INFO L87 Difference]: Start difference. First operand 22169 states and 31528 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:14:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:48,665 INFO L93 Difference]: Finished difference Result 38427 states and 54862 transitions. [2021-12-16 01:14:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:48,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-16 01:14:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:48,683 INFO L225 Difference]: With dead ends: 38427 [2021-12-16 01:14:48,683 INFO L226 Difference]: Without dead ends: 16297 [2021-12-16 01:14:48,702 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 [2021-12-16 01:14:48,703 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 54 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:48,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 268 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-12-16 01:14:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 16295. [2021-12-16 01:14:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16295 states, 16294 states have (on average 1.4215662206947342) internal successors, (23163), 16294 states have internal predecessors, (23163), 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) [2021-12-16 01:14:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16295 states to 16295 states and 23163 transitions. [2021-12-16 01:14:49,409 INFO L78 Accepts]: Start accepts. Automaton has 16295 states and 23163 transitions. Word has length 96 [2021-12-16 01:14:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:49,411 INFO L470 AbstractCegarLoop]: Abstraction has 16295 states and 23163 transitions. [2021-12-16 01:14:49,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:14:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 16295 states and 23163 transitions. [2021-12-16 01:14:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 01:14:49,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:49,416 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 01:14:49,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:14:49,416 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2106475655, now seen corresponding path program 1 times [2021-12-16 01:14:49,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:49,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447363017] [2021-12-16 01:14:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:49,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:49,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447363017] [2021-12-16 01:14:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447363017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:49,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:49,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:49,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079443915] [2021-12-16 01:14:49,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:49,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:49,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:49,459 INFO L87 Difference]: Start difference. First operand 16295 states and 23163 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-16 01:14:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:49,801 INFO L93 Difference]: Finished difference Result 24411 states and 34709 transitions. [2021-12-16 01:14:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-12-16 01:14:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:49,810 INFO L225 Difference]: With dead ends: 24411 [2021-12-16 01:14:49,810 INFO L226 Difference]: Without dead ends: 8185 [2021-12-16 01:14:49,823 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 [2021-12-16 01:14:49,824 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 247 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8185 states. [2021-12-16 01:14:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8185 to 8183. [2021-12-16 01:14:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8183 states, 8182 states have (on average 1.4073576142752384) internal successors, (11515), 8182 states have internal predecessors, (11515), 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) [2021-12-16 01:14:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8183 states to 8183 states and 11515 transitions. [2021-12-16 01:14:50,188 INFO L78 Accepts]: Start accepts. Automaton has 8183 states and 11515 transitions. Word has length 97 [2021-12-16 01:14:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:50,188 INFO L470 AbstractCegarLoop]: Abstraction has 8183 states and 11515 transitions. [2021-12-16 01:14:50,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-16 01:14:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8183 states and 11515 transitions. [2021-12-16 01:14:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 01:14:50,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:50,192 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 01:14:50,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:14:50,192 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2101372847, now seen corresponding path program 1 times [2021-12-16 01:14:50,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:50,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906460176] [2021-12-16 01:14:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:50,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:50,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:50,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906460176] [2021-12-16 01:14:50,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906460176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:14:50,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:14:50,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:14:50,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643859340] [2021-12-16 01:14:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:14:50,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:14:50,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:14:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:14:50,232 INFO L87 Difference]: Start difference. First operand 8183 states and 11515 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-16 01:14:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:50,460 INFO L93 Difference]: Finished difference Result 12243 states and 17237 transitions. [2021-12-16 01:14:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:14:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-12-16 01:14:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:50,467 INFO L225 Difference]: With dead ends: 12243 [2021-12-16 01:14:50,467 INFO L226 Difference]: Without dead ends: 4129 [2021-12-16 01:14:50,474 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 [2021-12-16 01:14:50,475 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 44 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:50,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 232 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:14:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-12-16 01:14:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4127. [2021-12-16 01:14:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 4126 states have (on average 1.3919049927290355) internal successors, (5743), 4126 states have internal predecessors, (5743), 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) [2021-12-16 01:14:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 5743 transitions. [2021-12-16 01:14:50,686 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 5743 transitions. Word has length 97 [2021-12-16 01:14:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 5743 transitions. [2021-12-16 01:14:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-16 01:14:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 5743 transitions. [2021-12-16 01:14:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 01:14:50,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:50,688 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 01:14:50,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 01:14:50,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 982097637, now seen corresponding path program 1 times [2021-12-16 01:14:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:50,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068678245] [2021-12-16 01:14:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:50,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:50,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068678245] [2021-12-16 01:14:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068678245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:14:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51366728] [2021-12-16 01:14:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:50,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:14:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:14:50,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:14:50,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:14:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 01:14:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:14:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:14:51,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:14:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:14:51,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51366728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:14:51,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:14:51,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-16 01:14:51,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851395500] [2021-12-16 01:14:51,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:14:51,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 01:14:51,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:14:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 01:14:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-16 01:14:51,758 INFO L87 Difference]: Start difference. First operand 4127 states and 5743 transitions. Second operand has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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) [2021-12-16 01:14:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:14:56,728 INFO L93 Difference]: Finished difference Result 55772 states and 76840 transitions. [2021-12-16 01:14:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-16 01:14:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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 97 [2021-12-16 01:14:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:14:56,791 INFO L225 Difference]: With dead ends: 55772 [2021-12-16 01:14:56,791 INFO L226 Difference]: Without dead ends: 51714 [2021-12-16 01:14:56,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-16 01:14:56,805 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 3667 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3667 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:14:56,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3667 Valid, 1204 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 01:14:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51714 states. [2021-12-16 01:14:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51714 to 34238. [2021-12-16 01:14:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34238 states, 34237 states have (on average 1.334404299442124) internal successors, (45686), 34237 states have internal predecessors, (45686), 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) [2021-12-16 01:14:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34238 states to 34238 states and 45686 transitions. [2021-12-16 01:14:58,238 INFO L78 Accepts]: Start accepts. Automaton has 34238 states and 45686 transitions. Word has length 97 [2021-12-16 01:14:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:14:58,238 INFO L470 AbstractCegarLoop]: Abstraction has 34238 states and 45686 transitions. [2021-12-16 01:14:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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) [2021-12-16 01:14:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 34238 states and 45686 transitions. [2021-12-16 01:14:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 01:14:58,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:14:58,241 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 01:14:58,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 01:14:58,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:14:58,456 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:14:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:14:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1539937692, now seen corresponding path program 1 times [2021-12-16 01:14:58,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:14:58,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263833158] [2021-12-16 01:14:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:58,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:14:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:58,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:14:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263833158] [2021-12-16 01:14:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263833158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:14:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824561461] [2021-12-16 01:14:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:14:58,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:14:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:14:58,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:14:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:14:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:14:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 01:14:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:14:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:14:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:15:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:15:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824561461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:15:00,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:15:00,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-16 01:15:00,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692194380] [2021-12-16 01:15:00,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:15:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 01:15:00,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:15:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 01:15:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-12-16 01:15:00,485 INFO L87 Difference]: Start difference. First operand 34238 states and 45686 transitions. Second operand has 25 states, 25 states have (on average 10.52) internal successors, (263), 24 states have internal predecessors, (263), 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)