./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.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 ce3fb29712e91707982cc1d90cd5fa002213aad836fd0a7fc53e12556da2c4fe --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:15:49,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:15:49,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:15:50,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:15:50,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:15:50,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:15:50,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:15:50,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:15:50,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:15:50,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:15:50,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:15:50,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:15:50,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:15:50,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:15:50,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:15:50,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:15:50,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:15:50,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:15:50,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:15:50,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:15:50,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:15:50,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:15:50,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:15:50,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:15:50,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:15:50,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:15:50,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:15:50,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:15:50,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:15:50,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:15:50,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:15:50,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:15:50,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:15:50,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:15:50,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:15:50,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:15:50,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:15:50,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:15:50,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:15:50,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:15:50,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:15:50,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:15:50,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:15:50,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:15:50,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:15:50,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:15:50,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:15:50,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:15:50,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:15:50,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:15:50,077 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:15:50,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:15:50,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:15:50,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:15:50,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:15:50,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:15:50,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:15:50,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:15:50,081 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:15:50,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:15:50,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:15:50,081 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce3fb29712e91707982cc1d90cd5fa002213aad836fd0a7fc53e12556da2c4fe [2021-12-16 02:15:50,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:15:50,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:15:50,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:15:50,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:15:50,262 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:15:50,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-16 02:15:50,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79b0cf52/5722d4b3ba734b2baf227cbc4755a117/FLAG62d9b4723 [2021-12-16 02:15:50,821 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:15:50,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-16 02:15:50,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79b0cf52/5722d4b3ba734b2baf227cbc4755a117/FLAG62d9b4723 [2021-12-16 02:15:51,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79b0cf52/5722d4b3ba734b2baf227cbc4755a117 [2021-12-16 02:15:51,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:15:51,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:15:51,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:15:51,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:15:51,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:15:51,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:15:51" (1/1) ... [2021-12-16 02:15:51,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46721b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:51, skipping insertion in model container [2021-12-16 02:15:51,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:15:51" (1/1) ... [2021-12-16 02:15:51,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:15:51,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:15:51,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[6450,6463] [2021-12-16 02:15:51,473 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[9267,9280] [2021-12-16 02:15:51,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:15:51,969 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:15:52,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[6450,6463] [2021-12-16 02:15:52,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[9267,9280] [2021-12-16 02:15:52,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:15:52,373 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:15:52,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52 WrapperNode [2021-12-16 02:15:52,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:15:52,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:15:52,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:15:52,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:15:52,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,704 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-16 02:15:52,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:15:52,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:15:52,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:15:52,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:15:52,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:52,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:53,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:53,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:15:53,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:15:53,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:15:53,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:15:53,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (1/1) ... [2021-12-16 02:15:53,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:15:53,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:15:53,110 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 02:15:53,128 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 02:15:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:15:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:15:53,266 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:15:53,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:15:56,010 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:15:56,022 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:15:56,023 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:15:56,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:15:56 BoogieIcfgContainer [2021-12-16 02:15:56,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:15:56,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:15:56,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:15:56,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:15:56,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:15:51" (1/3) ... [2021-12-16 02:15:56,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f163fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:15:56, skipping insertion in model container [2021-12-16 02:15:56,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:15:52" (2/3) ... [2021-12-16 02:15:56,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f163fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:15:56, skipping insertion in model container [2021-12-16 02:15:56,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:15:56" (3/3) ... [2021-12-16 02:15:56,033 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-12-16 02:15:56,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:15:56,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:15:56,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:15:56,078 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 02:15:56,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:15:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 02:15:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 02:15:56,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:56,106 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] [2021-12-16 02:15:56,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1253243637, now seen corresponding path program 1 times [2021-12-16 02:15:56,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:56,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428363814] [2021-12-16 02:15:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:56,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:56,275 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 02:15:56,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428363814] [2021-12-16 02:15:56,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428363814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:56,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:56,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:15:56,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287959984] [2021-12-16 02:15:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:56,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:15:56,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:15:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:15:56,303 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:15:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:59,470 INFO L93 Difference]: Finished difference Result 2507 states and 4814 transitions. [2021-12-16 02:15:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:15:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-16 02:15:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:59,496 INFO L225 Difference]: With dead ends: 2507 [2021-12-16 02:15:59,496 INFO L226 Difference]: Without dead ends: 1565 [2021-12-16 02:15:59,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:15:59,508 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 894 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:15:59,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 624 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-16 02:15:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-16 02:15:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-16 02:15:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6090850927703135) internal successors, (2515), 1564 states have internal predecessors, (2515), 0 states have call successors, (0), 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 02:15:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2515 transitions. [2021-12-16 02:15:59,593 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2515 transitions. Word has length 24 [2021-12-16 02:15:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:59,593 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2515 transitions. [2021-12-16 02:15:59,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:15:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2515 transitions. [2021-12-16 02:15:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 02:15:59,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:59,595 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] [2021-12-16 02:15:59,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:15:59,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-16 02:15:59,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:59,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872792446] [2021-12-16 02:15:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:59,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:59,649 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 02:15:59,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872792446] [2021-12-16 02:15:59,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872792446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:59,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:59,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:15:59,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707028945] [2021-12-16 02:15:59,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:59,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:15:59,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:15:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:15:59,656 INFO L87 Difference]: Start difference. First operand 1565 states and 2515 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:15:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:59,705 INFO L93 Difference]: Finished difference Result 1607 states and 2578 transitions. [2021-12-16 02:15:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:15:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-16 02:15:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:59,710 INFO L225 Difference]: With dead ends: 1607 [2021-12-16 02:15:59,710 INFO L226 Difference]: Without dead ends: 1565 [2021-12-16 02:15:59,714 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 02:15:59,715 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:15:59,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:15:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-16 02:15:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-16 02:15:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.598848368522073) internal successors, (2499), 1564 states have internal predecessors, (2499), 0 states have call successors, (0), 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 02:15:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2499 transitions. [2021-12-16 02:15:59,744 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2499 transitions. Word has length 26 [2021-12-16 02:15:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2499 transitions. [2021-12-16 02:15:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:15:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2499 transitions. [2021-12-16 02:15:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 02:15:59,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:59,751 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] [2021-12-16 02:15:59,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:15:59,752 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-16 02:15:59,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498604997] [2021-12-16 02:15:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:59,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:59,796 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 02:15:59,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498604997] [2021-12-16 02:15:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498604997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:59,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:59,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:15:59,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276103140] [2021-12-16 02:15:59,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:15:59,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:15:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:15:59,798 INFO L87 Difference]: Start difference. First operand 1565 states and 2499 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:15:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:59,820 INFO L93 Difference]: Finished difference Result 1635 states and 2607 transitions. [2021-12-16 02:15:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:15:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-16 02:15:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:59,825 INFO L225 Difference]: With dead ends: 1635 [2021-12-16 02:15:59,825 INFO L226 Difference]: Without dead ends: 1597 [2021-12-16 02:15:59,826 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 02:15:59,827 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 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 02:15:59,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:15:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-16 02:15:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1595. [2021-12-16 02:15:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.598242310106717) internal successors, (2546), 1594 states have internal predecessors, (2546), 0 states have call successors, (0), 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 02:15:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2546 transitions. [2021-12-16 02:15:59,853 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2546 transitions. Word has length 41 [2021-12-16 02:15:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:59,853 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2546 transitions. [2021-12-16 02:15:59,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:15:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2546 transitions. [2021-12-16 02:15:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 02:15:59,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:59,854 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] [2021-12-16 02:15:59,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:15:59,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-16 02:15:59,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:59,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864799082] [2021-12-16 02:15:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:59,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:59,891 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 02:15:59,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864799082] [2021-12-16 02:15:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864799082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:59,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:15:59,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213170992] [2021-12-16 02:15:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:59,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:15:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:15:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:15:59,894 INFO L87 Difference]: Start difference. First operand 1595 states and 2546 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:15:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:15:59,916 INFO L93 Difference]: Finished difference Result 1719 states and 2738 transitions. [2021-12-16 02:15:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:15:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-16 02:15:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:15:59,922 INFO L225 Difference]: With dead ends: 1719 [2021-12-16 02:15:59,922 INFO L226 Difference]: Without dead ends: 1651 [2021-12-16 02:15:59,923 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 02:15:59,924 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 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 02:15:59,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:15:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-12-16 02:15:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2021-12-16 02:15:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1647 states have (on average 1.5962355798421373) internal successors, (2629), 1648 states have internal predecessors, (2629), 0 states have call successors, (0), 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 02:15:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2629 transitions. [2021-12-16 02:15:59,953 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2629 transitions. Word has length 41 [2021-12-16 02:15:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:15:59,954 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2629 transitions. [2021-12-16 02:15:59,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:15:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2629 transitions. [2021-12-16 02:15:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 02:15:59,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:15:59,955 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] [2021-12-16 02:15:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:15:59,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:15:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:15:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-16 02:15:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:15:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569851519] [2021-12-16 02:15:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:15:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:15:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:15:59,997 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 02:15:59,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:15:59,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569851519] [2021-12-16 02:15:59,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569851519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:15:59,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:15:59,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:15:59,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982047944] [2021-12-16 02:15:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:15:59,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:15:59,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:15:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:00,000 INFO L87 Difference]: Start difference. First operand 1649 states and 2629 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:16:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,088 INFO L93 Difference]: Finished difference Result 2381 states and 3763 transitions. [2021-12-16 02:16:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:16:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-16 02:16:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,097 INFO L225 Difference]: With dead ends: 2381 [2021-12-16 02:16:00,098 INFO L226 Difference]: Without dead ends: 2259 [2021-12-16 02:16:00,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:16:00,100 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:00,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-12-16 02:16:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1769. [2021-12-16 02:16:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.5897000565930957) internal successors, (2809), 1768 states have internal predecessors, (2809), 0 states have call successors, (0), 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 02:16:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2809 transitions. [2021-12-16 02:16:00,145 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2809 transitions. Word has length 41 [2021-12-16 02:16:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2809 transitions. [2021-12-16 02:16:00,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:16:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2809 transitions. [2021-12-16 02:16:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:16:00,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:00,147 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] [2021-12-16 02:16:00,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:16:00,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-16 02:16:00,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844855435] [2021-12-16 02:16:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:00,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:00,185 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 02:16:00,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844855435] [2021-12-16 02:16:00,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844855435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:00,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:00,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:00,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066396734] [2021-12-16 02:16:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:00,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:00,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:00,188 INFO L87 Difference]: Start difference. First operand 1769 states and 2809 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:16:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,224 INFO L93 Difference]: Finished difference Result 2209 states and 3471 transitions. [2021-12-16 02:16:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-16 02:16:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,232 INFO L225 Difference]: With dead ends: 2209 [2021-12-16 02:16:00,232 INFO L226 Difference]: Without dead ends: 1967 [2021-12-16 02:16:00,234 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 02:16:00,235 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 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 02:16:00,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-16 02:16:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1957. [2021-12-16 02:16:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5718670076726342) internal successors, (3073), 1956 states have internal predecessors, (3073), 0 states have call successors, (0), 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 02:16:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3073 transitions. [2021-12-16 02:16:00,329 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3073 transitions. Word has length 43 [2021-12-16 02:16:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3073 transitions. [2021-12-16 02:16:00,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:16:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3073 transitions. [2021-12-16 02:16:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 02:16:00,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:00,330 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] [2021-12-16 02:16:00,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:16:00,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-16 02:16:00,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:00,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326805087] [2021-12-16 02:16:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:00,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:00,408 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 02:16:00,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:00,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326805087] [2021-12-16 02:16:00,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326805087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:00,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:00,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:00,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788572837] [2021-12-16 02:16:00,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:00,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:00,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:00,411 INFO L87 Difference]: Start difference. First operand 1957 states and 3073 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:16:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,473 INFO L93 Difference]: Finished difference Result 2389 states and 3707 transitions. [2021-12-16 02:16:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:16:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-16 02:16:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,480 INFO L225 Difference]: With dead ends: 2389 [2021-12-16 02:16:00,480 INFO L226 Difference]: Without dead ends: 1959 [2021-12-16 02:16:00,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:00,481 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:00,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-12-16 02:16:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1957. [2021-12-16 02:16:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.567774936061381) internal successors, (3065), 1956 states have internal predecessors, (3065), 0 states have call successors, (0), 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 02:16:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3065 transitions. [2021-12-16 02:16:00,522 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3065 transitions. Word has length 43 [2021-12-16 02:16:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:00,522 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3065 transitions. [2021-12-16 02:16:00,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:16:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3065 transitions. [2021-12-16 02:16:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 02:16:00,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:00,523 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] [2021-12-16 02:16:00,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:16:00,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-16 02:16:00,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:00,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827910655] [2021-12-16 02:16:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:00,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:00,569 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 02:16:00,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827910655] [2021-12-16 02:16:00,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827910655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:00,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:00,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:00,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324259356] [2021-12-16 02:16:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:00,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:00,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:00,571 INFO L87 Difference]: Start difference. First operand 1957 states and 3065 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 02:16:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,633 INFO L93 Difference]: Finished difference Result 2291 states and 3537 transitions. [2021-12-16 02:16:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:16:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-16 02:16:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,641 INFO L225 Difference]: With dead ends: 2291 [2021-12-16 02:16:00,641 INFO L226 Difference]: Without dead ends: 2289 [2021-12-16 02:16:00,642 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 02:16:00,643 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 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 02:16:00,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-12-16 02:16:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1981. [2021-12-16 02:16:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1979 states have (on average 1.558868115209702) internal successors, (3085), 1980 states have internal predecessors, (3085), 0 states have call successors, (0), 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 02:16:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3085 transitions. [2021-12-16 02:16:00,685 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3085 transitions. Word has length 44 [2021-12-16 02:16:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3085 transitions. [2021-12-16 02:16:00,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 02:16:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3085 transitions. [2021-12-16 02:16:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 02:16:00,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:00,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:00,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:16:00,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-16 02:16:00,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517011129] [2021-12-16 02:16:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:00,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:00,715 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 02:16:00,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:00,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517011129] [2021-12-16 02:16:00,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517011129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:00,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:00,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:00,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782195266] [2021-12-16 02:16:00,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:00,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:00,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:00,717 INFO L87 Difference]: Start difference. First operand 1981 states and 3085 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,753 INFO L93 Difference]: Finished difference Result 2452 states and 3763 transitions. [2021-12-16 02:16:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 02:16:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,760 INFO L225 Difference]: With dead ends: 2452 [2021-12-16 02:16:00,760 INFO L226 Difference]: Without dead ends: 2185 [2021-12-16 02:16:00,761 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 02:16:00,761 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 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 02:16:00,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-12-16 02:16:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-12-16 02:16:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2181 states have (on average 1.5419532324621734) internal successors, (3363), 2182 states have internal predecessors, (3363), 0 states have call successors, (0), 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 02:16:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3363 transitions. [2021-12-16 02:16:00,809 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3363 transitions. Word has length 45 [2021-12-16 02:16:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3363 transitions. [2021-12-16 02:16:00,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3363 transitions. [2021-12-16 02:16:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:16:00,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:00,810 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] [2021-12-16 02:16:00,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:16:00,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-16 02:16:00,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958124162] [2021-12-16 02:16:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 02:16:00,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958124162] [2021-12-16 02:16:00,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958124162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:00,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:00,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:00,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043548601] [2021-12-16 02:16:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:00,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:00,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:00,870 INFO L87 Difference]: Start difference. First operand 2183 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 02:16:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:00,976 INFO L93 Difference]: Finished difference Result 4287 states and 6315 transitions. [2021-12-16 02:16:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:16:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 64 [2021-12-16 02:16:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:00,988 INFO L225 Difference]: With dead ends: 4287 [2021-12-16 02:16:00,988 INFO L226 Difference]: Without dead ends: 3633 [2021-12-16 02:16:00,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:16:00,991 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:00,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-12-16 02:16:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2835. [2021-12-16 02:16:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2833 states have (on average 1.5075891281327214) internal successors, (4271), 2834 states have internal predecessors, (4271), 0 states have call successors, (0), 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 02:16:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4271 transitions. [2021-12-16 02:16:01,071 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4271 transitions. Word has length 64 [2021-12-16 02:16:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 4271 transitions. [2021-12-16 02:16:01,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 02:16:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4271 transitions. [2021-12-16 02:16:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:16:01,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:01,073 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] [2021-12-16 02:16:01,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:16:01,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-16 02:16:01,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:01,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572383147] [2021-12-16 02:16:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:01,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 02:16:01,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572383147] [2021-12-16 02:16:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572383147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:01,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283531051] [2021-12-16 02:16:01,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:01,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:01,123 INFO L87 Difference]: Start difference. First operand 2835 states and 4271 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 02:16:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:01,251 INFO L93 Difference]: Finished difference Result 4939 states and 7223 transitions. [2021-12-16 02:16:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:16:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 64 [2021-12-16 02:16:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:01,266 INFO L225 Difference]: With dead ends: 4939 [2021-12-16 02:16:01,266 INFO L226 Difference]: Without dead ends: 4285 [2021-12-16 02:16:01,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:16:01,270 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:01,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-12-16 02:16:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3815. [2021-12-16 02:16:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3813 states have (on average 1.4746918436926304) internal successors, (5623), 3814 states have internal predecessors, (5623), 0 states have call successors, (0), 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 02:16:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 5623 transitions. [2021-12-16 02:16:01,473 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 5623 transitions. Word has length 64 [2021-12-16 02:16:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:01,474 INFO L470 AbstractCegarLoop]: Abstraction has 3815 states and 5623 transitions. [2021-12-16 02:16:01,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 02:16:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 5623 transitions. [2021-12-16 02:16:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:16:01,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:01,475 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:01,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:16:01,476 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-16 02:16:01,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:01,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204650291] [2021-12-16 02:16:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:01,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:01,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204650291] [2021-12-16 02:16:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204650291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:01,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442411143] [2021-12-16 02:16:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:01,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:01,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:01,508 INFO L87 Difference]: Start difference. First operand 3815 states and 5623 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:01,587 INFO L93 Difference]: Finished difference Result 5465 states and 7947 transitions. [2021-12-16 02:16:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-16 02:16:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:01,595 INFO L225 Difference]: With dead ends: 5465 [2021-12-16 02:16:01,596 INFO L226 Difference]: Without dead ends: 3179 [2021-12-16 02:16:01,600 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 02:16:01,600 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 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 02:16:01,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-12-16 02:16:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3177. [2021-12-16 02:16:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3175 states have (on average 1.4916535433070865) internal successors, (4736), 3176 states have internal predecessors, (4736), 0 states have call successors, (0), 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 02:16:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4736 transitions. [2021-12-16 02:16:01,728 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4736 transitions. Word has length 66 [2021-12-16 02:16:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 4736 transitions. [2021-12-16 02:16:01,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4736 transitions. [2021-12-16 02:16:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:16:01,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:01,731 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:01,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:16:01,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-16 02:16:01,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:01,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346194289] [2021-12-16 02:16:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:01,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:16:01,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:01,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346194289] [2021-12-16 02:16:01,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346194289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:01,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:01,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:01,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541815984] [2021-12-16 02:16:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:01,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:01,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:01,797 INFO L87 Difference]: Start difference. First operand 3177 states and 4736 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 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 02:16:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:01,964 INFO L93 Difference]: Finished difference Result 4577 states and 6708 transitions. [2021-12-16 02:16:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:16:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 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 66 [2021-12-16 02:16:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:01,974 INFO L225 Difference]: With dead ends: 4577 [2021-12-16 02:16:01,974 INFO L226 Difference]: Without dead ends: 4111 [2021-12-16 02:16:01,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:16:01,977 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3076 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:01,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 3207 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-12-16 02:16:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 3641. [2021-12-16 02:16:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3639 states have (on average 1.4795273426765594) internal successors, (5384), 3640 states have internal predecessors, (5384), 0 states have call successors, (0), 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 02:16:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5384 transitions. [2021-12-16 02:16:02,105 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5384 transitions. Word has length 66 [2021-12-16 02:16:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5384 transitions. [2021-12-16 02:16:02,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 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 02:16:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5384 transitions. [2021-12-16 02:16:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:16:02,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:02,107 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:16:02,108 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-16 02:16:02,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:02,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894649521] [2021-12-16 02:16:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:02,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:02,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894649521] [2021-12-16 02:16:02,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894649521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642944396] [2021-12-16 02:16:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:02,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:02,326 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 02:16:02,364 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 02:16:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:16:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:16:02,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:16:02,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642944396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:02,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:02,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-16 02:16:02,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253148572] [2021-12-16 02:16:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:02,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 02:16:02,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 02:16:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:16:02,828 INFO L87 Difference]: Start difference. First operand 3641 states and 5384 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 02:16:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:05,765 INFO L93 Difference]: Finished difference Result 22942 states and 31777 transitions. [2021-12-16 02:16:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 02:16:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 02:16:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:05,811 INFO L225 Difference]: With dead ends: 22942 [2021-12-16 02:16:05,812 INFO L226 Difference]: Without dead ends: 20852 [2021-12-16 02:16:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-16 02:16:05,824 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 17749 mSDsluCounter, 5244 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17749 SdHoareTripleChecker+Valid, 6811 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:05,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17749 Valid, 6811 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:16:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20852 states. [2021-12-16 02:16:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20852 to 12505. [2021-12-16 02:16:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 12503 states have (on average 1.3639126609613692) internal successors, (17053), 12504 states have internal predecessors, (17053), 0 states have call successors, (0), 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 02:16:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 17053 transitions. [2021-12-16 02:16:06,452 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 17053 transitions. Word has length 67 [2021-12-16 02:16:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:06,452 INFO L470 AbstractCegarLoop]: Abstraction has 12505 states and 17053 transitions. [2021-12-16 02:16:06,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 02:16:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 17053 transitions. [2021-12-16 02:16:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:06,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:06,454 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:06,477 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 02:16:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 02:16:06,672 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-16 02:16:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334010686] [2021-12-16 02:16:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:06,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:06,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:06,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334010686] [2021-12-16 02:16:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334010686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:06,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124192008] [2021-12-16 02:16:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:06,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:06,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:06,875 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 02:16:06,899 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 02:16:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:16:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:07,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:08,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124192008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:08,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-16 02:16:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660994857] [2021-12-16 02:16:08,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:08,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 02:16:08,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:08,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 02:16:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-16 02:16:08,225 INFO L87 Difference]: Start difference. First operand 12505 states and 17053 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 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 02:16:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:12,282 INFO L93 Difference]: Finished difference Result 69077 states and 91379 transitions. [2021-12-16 02:16:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 02:16:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 02:16:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:12,407 INFO L225 Difference]: With dead ends: 69077 [2021-12-16 02:16:12,407 INFO L226 Difference]: Without dead ends: 59809 [2021-12-16 02:16:12,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-16 02:16:12,433 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 15901 mSDsluCounter, 6756 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15901 SdHoareTripleChecker+Valid, 8304 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:12,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15901 Valid, 8304 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 02:16:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59809 states. [2021-12-16 02:16:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59809 to 26974. [2021-12-16 02:16:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26974 states, 26972 states have (on average 1.3439122052498889) internal successors, (36248), 26973 states have internal predecessors, (36248), 0 states have call successors, (0), 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 02:16:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26974 states to 26974 states and 36248 transitions. [2021-12-16 02:16:13,930 INFO L78 Accepts]: Start accepts. Automaton has 26974 states and 36248 transitions. Word has length 68 [2021-12-16 02:16:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:13,930 INFO L470 AbstractCegarLoop]: Abstraction has 26974 states and 36248 transitions. [2021-12-16 02:16:13,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 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 02:16:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26974 states and 36248 transitions. [2021-12-16 02:16:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:13,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:13,932 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:13,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:16:14,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 02:16:14,151 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-16 02:16:14,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:14,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481639424] [2021-12-16 02:16:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:14,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:14,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481639424] [2021-12-16 02:16:14,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481639424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115949631] [2021-12-16 02:16:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:14,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:14,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:16:14,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:16:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:16:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:14,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:15,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115949631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:15,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:15,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-16 02:16:15,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639998058] [2021-12-16 02:16:15,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:15,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 02:16:15,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 02:16:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-16 02:16:15,307 INFO L87 Difference]: Start difference. First operand 26974 states and 36248 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:16:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:20,368 INFO L93 Difference]: Finished difference Result 114365 states and 150697 transitions. [2021-12-16 02:16:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 02:16:20,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 02:16:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:20,537 INFO L225 Difference]: With dead ends: 114365 [2021-12-16 02:16:20,537 INFO L226 Difference]: Without dead ends: 92142 [2021-12-16 02:16:20,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 02:16:20,582 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 15465 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15465 SdHoareTripleChecker+Valid, 4930 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:20,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15465 Valid, 4930 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:16:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92142 states. [2021-12-16 02:16:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92142 to 54011. [2021-12-16 02:16:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54011 states, 54009 states have (on average 1.3194837897387472) internal successors, (71264), 54010 states have internal predecessors, (71264), 0 states have call successors, (0), 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 02:16:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54011 states to 54011 states and 71264 transitions. [2021-12-16 02:16:24,091 INFO L78 Accepts]: Start accepts. Automaton has 54011 states and 71264 transitions. Word has length 68 [2021-12-16 02:16:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 54011 states and 71264 transitions. [2021-12-16 02:16:24,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:16:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 54011 states and 71264 transitions. [2021-12-16 02:16:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:24,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:24,094 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] [2021-12-16 02:16:24,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:16:24,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:24,307 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-16 02:16:24,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388621985] [2021-12-16 02:16:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:24,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388621985] [2021-12-16 02:16:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388621985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:24,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:24,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:24,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635051636] [2021-12-16 02:16:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:24,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:24,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:24,340 INFO L87 Difference]: Start difference. First operand 54011 states and 71264 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:26,137 INFO L93 Difference]: Finished difference Result 78449 states and 102807 transitions. [2021-12-16 02:16:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 02:16:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:26,182 INFO L225 Difference]: With dead ends: 78449 [2021-12-16 02:16:26,182 INFO L226 Difference]: Without dead ends: 31369 [2021-12-16 02:16:26,218 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 02:16:26,218 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 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 02:16:26,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31369 states. [2021-12-16 02:16:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31369 to 30941. [2021-12-16 02:16:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30941 states, 30939 states have (on average 1.2880830020362648) internal successors, (39852), 30940 states have internal predecessors, (39852), 0 states have call successors, (0), 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 02:16:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30941 states to 30941 states and 39852 transitions. [2021-12-16 02:16:27,783 INFO L78 Accepts]: Start accepts. Automaton has 30941 states and 39852 transitions. Word has length 68 [2021-12-16 02:16:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:27,783 INFO L470 AbstractCegarLoop]: Abstraction has 30941 states and 39852 transitions. [2021-12-16 02:16:27,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30941 states and 39852 transitions. [2021-12-16 02:16:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:27,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:27,785 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] [2021-12-16 02:16:27,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:16:27,786 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-16 02:16:27,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:27,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523285162] [2021-12-16 02:16:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:27,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:27,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523285162] [2021-12-16 02:16:27,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523285162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:27,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:27,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:27,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701762771] [2021-12-16 02:16:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:27,818 INFO L87 Difference]: Start difference. First operand 30941 states and 39852 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:28,839 INFO L93 Difference]: Finished difference Result 46927 states and 60066 transitions. [2021-12-16 02:16:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 02:16:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:28,868 INFO L225 Difference]: With dead ends: 46927 [2021-12-16 02:16:28,868 INFO L226 Difference]: Without dead ends: 20863 [2021-12-16 02:16:28,890 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 02:16:28,890 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 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 02:16:28,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-12-16 02:16:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 20861. [2021-12-16 02:16:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20859 states have (on average 1.2661680809243012) internal successors, (26411), 20860 states have internal predecessors, (26411), 0 states have call successors, (0), 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 02:16:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 26411 transitions. [2021-12-16 02:16:29,942 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 26411 transitions. Word has length 68 [2021-12-16 02:16:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:29,942 INFO L470 AbstractCegarLoop]: Abstraction has 20861 states and 26411 transitions. [2021-12-16 02:16:29,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 26411 transitions. [2021-12-16 02:16:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:29,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:29,943 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:29,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:16:29,944 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-16 02:16:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:29,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574771113] [2021-12-16 02:16:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:29,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:16:29,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:29,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574771113] [2021-12-16 02:16:29,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574771113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:29,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:29,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:29,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746388725] [2021-12-16 02:16:29,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:29,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:29,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:29,984 INFO L87 Difference]: Start difference. First operand 20861 states and 26411 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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 02:16:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,769 INFO L93 Difference]: Finished difference Result 36624 states and 46136 transitions. [2021-12-16 02:16:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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 68 [2021-12-16 02:16:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,796 INFO L225 Difference]: With dead ends: 36624 [2021-12-16 02:16:30,796 INFO L226 Difference]: Without dead ends: 17377 [2021-12-16 02:16:30,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:30,814 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4507 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:30,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4507 Valid, 2968 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17377 states. [2021-12-16 02:16:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17377 to 17377. [2021-12-16 02:16:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 17375 states have (on average 1.256) internal successors, (21823), 17376 states have internal predecessors, (21823), 0 states have call successors, (0), 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 02:16:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 21823 transitions. [2021-12-16 02:16:31,709 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 21823 transitions. Word has length 68 [2021-12-16 02:16:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,709 INFO L470 AbstractCegarLoop]: Abstraction has 17377 states and 21823 transitions. [2021-12-16 02:16:31,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 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 02:16:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 21823 transitions. [2021-12-16 02:16:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:31,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,711 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:31,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:16:31,711 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-16 02:16:31,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52566341] [2021-12-16 02:16:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 02:16:31,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:31,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52566341] [2021-12-16 02:16:31,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52566341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:31,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:31,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:31,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159516986] [2021-12-16 02:16:31,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:31,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:31,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:31,764 INFO L87 Difference]: Start difference. First operand 17377 states and 21823 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:16:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:32,516 INFO L93 Difference]: Finished difference Result 28988 states and 36074 transitions. [2021-12-16 02:16:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-16 02:16:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:32,536 INFO L225 Difference]: With dead ends: 28988 [2021-12-16 02:16:32,536 INFO L226 Difference]: Without dead ends: 13257 [2021-12-16 02:16:32,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:32,552 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:32,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13257 states. [2021-12-16 02:16:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13257 to 13257. [2021-12-16 02:16:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 13255 states have (on average 1.247981893625047) internal successors, (16542), 13256 states have internal predecessors, (16542), 0 states have call successors, (0), 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 02:16:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 16542 transitions. [2021-12-16 02:16:33,369 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 16542 transitions. Word has length 68 [2021-12-16 02:16:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 13257 states and 16542 transitions. [2021-12-16 02:16:33,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 02:16:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 16542 transitions. [2021-12-16 02:16:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:16:33,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:33,371 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:16:33,371 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-16 02:16:33,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891676169] [2021-12-16 02:16:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:33,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 02:16:33,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:33,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891676169] [2021-12-16 02:16:33,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891676169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:33,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:33,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:33,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038140624] [2021-12-16 02:16:33,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:33,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:33,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:33,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:33,411 INFO L87 Difference]: Start difference. First operand 13257 states and 16542 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 02:16:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:34,024 INFO L93 Difference]: Finished difference Result 22263 states and 27467 transitions. [2021-12-16 02:16:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:34,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 68 [2021-12-16 02:16:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:34,036 INFO L225 Difference]: With dead ends: 22263 [2021-12-16 02:16:34,036 INFO L226 Difference]: Without dead ends: 10573 [2021-12-16 02:16:34,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:34,046 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4563 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4563 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:34,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4563 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10573 states. [2021-12-16 02:16:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10573 to 10573. [2021-12-16 02:16:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10571 states have (on average 1.2508750354744111) internal successors, (13223), 10572 states have internal predecessors, (13223), 0 states have call successors, (0), 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 02:16:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 13223 transitions. [2021-12-16 02:16:34,529 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 13223 transitions. Word has length 68 [2021-12-16 02:16:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:34,530 INFO L470 AbstractCegarLoop]: Abstraction has 10573 states and 13223 transitions. [2021-12-16 02:16:34,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 02:16:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 13223 transitions. [2021-12-16 02:16:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:16:34,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:34,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:34,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:16:34,531 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-16 02:16:34,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363017046] [2021-12-16 02:16:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:34,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:35,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363017046] [2021-12-16 02:16:35,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363017046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546893051] [2021-12-16 02:16:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:35,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:35,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:16:35,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:16:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 02:16:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:36,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:36,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546893051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:36,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:36,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 45 [2021-12-16 02:16:36,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810013058] [2021-12-16 02:16:36,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:36,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 02:16:36,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 02:16:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 02:16:36,979 INFO L87 Difference]: Start difference. First operand 10573 states and 13223 transitions. Second operand has 45 states, 45 states have (on average 4.066666666666666) internal successors, (183), 45 states have internal predecessors, (183), 0 states have call successors, (0), 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 02:16:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:44,624 INFO L93 Difference]: Finished difference Result 28652 states and 35196 transitions. [2021-12-16 02:16:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-16 02:16:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.066666666666666) internal successors, (183), 45 states have internal predecessors, (183), 0 states have call successors, (0), 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 69 [2021-12-16 02:16:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:44,655 INFO L225 Difference]: With dead ends: 28652 [2021-12-16 02:16:44,656 INFO L226 Difference]: Without dead ends: 24370 [2021-12-16 02:16:44,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-12-16 02:16:44,665 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 23283 mSDsluCounter, 31150 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23283 SdHoareTripleChecker+Valid, 32845 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:44,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23283 Valid, 32845 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 02:16:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24370 states. [2021-12-16 02:16:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24370 to 9210. [2021-12-16 02:16:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9210 states, 9208 states have (on average 1.2567332754126845) internal successors, (11572), 9209 states have internal predecessors, (11572), 0 states have call successors, (0), 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 02:16:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9210 states to 9210 states and 11572 transitions. [2021-12-16 02:16:45,289 INFO L78 Accepts]: Start accepts. Automaton has 9210 states and 11572 transitions. Word has length 69 [2021-12-16 02:16:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:45,290 INFO L470 AbstractCegarLoop]: Abstraction has 9210 states and 11572 transitions. [2021-12-16 02:16:45,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.066666666666666) internal successors, (183), 45 states have internal predecessors, (183), 0 states have call successors, (0), 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 02:16:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 9210 states and 11572 transitions. [2021-12-16 02:16:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:16:45,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:45,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:45,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:16:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:45,491 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 353414708, now seen corresponding path program 1 times [2021-12-16 02:16:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456322833] [2021-12-16 02:16:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:45,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456322833] [2021-12-16 02:16:45,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456322833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859529237] [2021-12-16 02:16:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:45,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:45,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:16:45,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:16:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 02:16:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:46,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859529237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:47,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:47,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2021-12-16 02:16:47,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875024136] [2021-12-16 02:16:47,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 02:16:47,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 02:16:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-12-16 02:16:47,523 INFO L87 Difference]: Start difference. First operand 9210 states and 11572 transitions. Second operand has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 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 02:16:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:49,393 INFO L93 Difference]: Finished difference Result 15922 states and 19839 transitions. [2021-12-16 02:16:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 02:16:49,393 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 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 69 [2021-12-16 02:16:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:49,407 INFO L225 Difference]: With dead ends: 15922 [2021-12-16 02:16:49,408 INFO L226 Difference]: Without dead ends: 12086 [2021-12-16 02:16:49,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 02:16:49,413 INFO L933 BasicCegarLoop]: 1595 mSDtfsCounter, 9744 mSDsluCounter, 22318 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9744 SdHoareTripleChecker+Valid, 23913 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:49,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9744 Valid, 23913 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:16:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2021-12-16 02:16:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7254. [2021-12-16 02:16:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7254 states, 7252 states have (on average 1.272338665195808) internal successors, (9227), 7253 states have internal predecessors, (9227), 0 states have call successors, (0), 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 02:16:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7254 states to 7254 states and 9227 transitions. [2021-12-16 02:16:49,902 INFO L78 Accepts]: Start accepts. Automaton has 7254 states and 9227 transitions. Word has length 69 [2021-12-16 02:16:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:49,902 INFO L470 AbstractCegarLoop]: Abstraction has 7254 states and 9227 transitions. [2021-12-16 02:16:49,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 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 02:16:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7254 states and 9227 transitions. [2021-12-16 02:16:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 02:16:49,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:49,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:16:49,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 02:16:50,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 02:16:50,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:50,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1592733223, now seen corresponding path program 1 times [2021-12-16 02:16:50,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:50,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528061732] [2021-12-16 02:16:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:50,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat