./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:51:05,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:51:05,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:51:05,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:51:05,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:51:05,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:51:05,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:51:05,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:51:05,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:51:06,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:51:06,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:51:06,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:51:06,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:51:06,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:51:06,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:51:06,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:51:06,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:51:06,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:51:06,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:51:06,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:51:06,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:51:06,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:51:06,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:51:06,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:51:06,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:51:06,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:51:06,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:51:06,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:51:06,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:51:06,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:51:06,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:51:06,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:51:06,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:51:06,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:51:06,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:51:06,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:51:06,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:51:06,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:51:06,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:51:06,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:51:06,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:51:06,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:51:06,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:51:06,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:51:06,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:51:06,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:51:06,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:51:06,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:51:06,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:51:06,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:51:06,063 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:51:06,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:51:06,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:51:06,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:51:06,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:51:06,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:51:06,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:51:06,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:51:06,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:51:06,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:51:06,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:51:06,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:51:06,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:51:06,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:51:06,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:51:06,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:51:06,067 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:51:06,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:51:06,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:51:06,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:51:06,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf2e081cc9f75dea6397073b82669a6a6f9f53b1ab4e083e4f8da1bc210df95c [2021-12-17 15:51:06,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:51:06,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:51:06,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:51:06,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:51:06,262 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:51:06,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:06,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c602694b/f81ff2d6f04744478d44b8b1dcfefb3d/FLAG9ec50def9 [2021-12-17 15:51:06,660 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:51:06,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:06,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c602694b/f81ff2d6f04744478d44b8b1dcfefb3d/FLAG9ec50def9 [2021-12-17 15:51:06,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c602694b/f81ff2d6f04744478d44b8b1dcfefb3d [2021-12-17 15:51:06,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:51:06,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:51:06,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:51:06,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:51:06,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:51:06,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724e8abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06, skipping insertion in model container [2021-12-17 15:51:06,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:51:06,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:51:06,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-12-17 15:51:06,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:51:06,849 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:51:06,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c[12820,12833] [2021-12-17 15:51:06,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:51:06,889 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:51:06,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06 WrapperNode [2021-12-17 15:51:06,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:51:06,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:51:06,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:51:06,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:51:06,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,945 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 389 [2021-12-17 15:51:06,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:51:06,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:51:06,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:51:06,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:51:06,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:51:06,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:51:06,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:51:06,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:51:06,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (1/1) ... [2021-12-17 15:51:06,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:51:07,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:51:07,012 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) [2021-12-17 15:51:07,028 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 [2021-12-17 15:51:07,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:51:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:51:07,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:51:07,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:51:07,111 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:51:07,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:51:07,419 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:51:07,436 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:51:07,437 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 15:51:07,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:51:07 BoogieIcfgContainer [2021-12-17 15:51:07,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:51:07,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:51:07,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:51:07,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:51:07,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:51:06" (1/3) ... [2021-12-17 15:51:07,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0fe660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:51:07, skipping insertion in model container [2021-12-17 15:51:07,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:06" (2/3) ... [2021-12-17 15:51:07,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e0fe660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:51:07, skipping insertion in model container [2021-12-17 15:51:07,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:51:07" (3/3) ... [2021-12-17 15:51:07,445 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:07,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:51:07,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:51:07,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:51:07,483 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 [2021-12-17 15:51:07,484 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:51:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 15:51:07,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:07,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:07,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1522683097, now seen corresponding path program 1 times [2021-12-17 15:51:07,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733086870] [2021-12-17 15:51:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:07,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:07,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:07,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733086870] [2021-12-17 15:51:07,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733086870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:07,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:07,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 15:51:07,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112279342] [2021-12-17 15:51:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:07,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 15:51:07,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 15:51:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:51:07,700 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 123 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:07,732 INFO L93 Difference]: Finished difference Result 207 states and 343 transitions. [2021-12-17 15:51:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 15:51:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-17 15:51:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:07,742 INFO L225 Difference]: With dead ends: 207 [2021-12-17 15:51:07,743 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 15:51:07,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:51:07,748 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:07,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 15:51:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-17 15:51:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 119 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 201 transitions. [2021-12-17 15:51:07,789 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 201 transitions. Word has length 34 [2021-12-17 15:51:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 201 transitions. [2021-12-17 15:51:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 201 transitions. [2021-12-17 15:51:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 15:51:07,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:07,794 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] [2021-12-17 15:51:07,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:51:07,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -136479703, now seen corresponding path program 1 times [2021-12-17 15:51:07,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:07,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068866871] [2021-12-17 15:51:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:07,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:07,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068866871] [2021-12-17 15:51:07,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068866871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:07,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:07,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:51:07,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124181234] [2021-12-17 15:51:07,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:07,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:51:07,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:51:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:51:07,893 INFO L87 Difference]: Start difference. First operand 120 states and 201 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:07,973 INFO L93 Difference]: Finished difference Result 206 states and 336 transitions. [2021-12-17 15:51:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:51:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-17 15:51:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:07,974 INFO L225 Difference]: With dead ends: 206 [2021-12-17 15:51:07,974 INFO L226 Difference]: Without dead ends: 120 [2021-12-17 15:51:07,975 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 [2021-12-17 15:51:07,976 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 3 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:07,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 761 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-17 15:51:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-17 15:51:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4201680672268908) internal successors, (169), 119 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2021-12-17 15:51:07,981 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 34 [2021-12-17 15:51:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2021-12-17 15:51:07,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2021-12-17 15:51:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 15:51:07,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:07,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:51:07,983 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 958823668, now seen corresponding path program 1 times [2021-12-17 15:51:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773238359] [2021-12-17 15:51:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:07,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773238359] [2021-12-17 15:51:08,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773238359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:08,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637912811] [2021-12-17 15:51:08,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:08,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:08,092 INFO L87 Difference]: Start difference. First operand 120 states and 169 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:08,103 INFO L93 Difference]: Finished difference Result 272 states and 411 transitions. [2021-12-17 15:51:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-17 15:51:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:08,108 INFO L225 Difference]: With dead ends: 272 [2021-12-17 15:51:08,109 INFO L226 Difference]: Without dead ends: 190 [2021-12-17 15:51:08,110 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 [2021-12-17 15:51:08,112 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 114 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 376 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 [2021-12-17 15:51:08,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 376 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-17 15:51:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-12-17 15:51:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.4866310160427807) internal successors, (278), 187 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 278 transitions. [2021-12-17 15:51:08,128 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 278 transitions. Word has length 65 [2021-12-17 15:51:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 278 transitions. [2021-12-17 15:51:08,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 278 transitions. [2021-12-17 15:51:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:51:08,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:08,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:08,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:51:08,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1904004827, now seen corresponding path program 1 times [2021-12-17 15:51:08,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123497596] [2021-12-17 15:51:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:08,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123497596] [2021-12-17 15:51:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123497596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630515549] [2021-12-17 15:51:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:08,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:08,207 INFO L87 Difference]: Start difference. First operand 188 states and 278 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) [2021-12-17 15:51:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:08,227 INFO L93 Difference]: Finished difference Result 464 states and 718 transitions. [2021-12-17 15:51:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:08,227 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 [2021-12-17 15:51:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:08,229 INFO L225 Difference]: With dead ends: 464 [2021-12-17 15:51:08,229 INFO L226 Difference]: Without dead ends: 314 [2021-12-17 15:51:08,233 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 [2021-12-17 15:51:08,240 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 109 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 367 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 [2021-12-17 15:51:08,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 367 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-17 15:51:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-12-17 15:51:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.527331189710611) internal successors, (475), 311 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 475 transitions. [2021-12-17 15:51:08,259 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 475 transitions. Word has length 66 [2021-12-17 15:51:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:08,260 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 475 transitions. [2021-12-17 15:51:08,260 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) [2021-12-17 15:51:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 475 transitions. [2021-12-17 15:51:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:51:08,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:08,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:08,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:51:08,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1896694372, now seen corresponding path program 1 times [2021-12-17 15:51:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626312859] [2021-12-17 15:51:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:08,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626312859] [2021-12-17 15:51:08,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626312859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:08,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003734127] [2021-12-17 15:51:08,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:08,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:08,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:08,318 INFO L87 Difference]: Start difference. First operand 312 states and 475 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:08,342 INFO L93 Difference]: Finished difference Result 812 states and 1269 transitions. [2021-12-17 15:51:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 15:51:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:08,345 INFO L225 Difference]: With dead ends: 812 [2021-12-17 15:51:08,345 INFO L226 Difference]: Without dead ends: 538 [2021-12-17 15:51:08,346 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 [2021-12-17 15:51:08,349 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 104 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 358 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 [2021-12-17 15:51:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-17 15:51:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2021-12-17 15:51:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.5457943925233646) internal successors, (827), 535 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 827 transitions. [2021-12-17 15:51:08,373 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 827 transitions. Word has length 67 [2021-12-17 15:51:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 827 transitions. [2021-12-17 15:51:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 827 transitions. [2021-12-17 15:51:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 15:51:08,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:08,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:08,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:51:08,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1528655733, now seen corresponding path program 1 times [2021-12-17 15:51:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:08,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537247578] [2021-12-17 15:51:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:08,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537247578] [2021-12-17 15:51:08,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537247578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:08,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928184681] [2021-12-17 15:51:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:08,407 INFO L87 Difference]: Start difference. First operand 536 states and 827 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) [2021-12-17 15:51:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:08,459 INFO L93 Difference]: Finished difference Result 1436 states and 2245 transitions. [2021-12-17 15:51:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:08,460 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 [2021-12-17 15:51:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:08,463 INFO L225 Difference]: With dead ends: 1436 [2021-12-17 15:51:08,463 INFO L226 Difference]: Without dead ends: 938 [2021-12-17 15:51:08,464 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 [2021-12-17 15:51:08,465 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 99 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 349 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 [2021-12-17 15:51:08,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 349 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-17 15:51:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 936. [2021-12-17 15:51:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.5475935828877005) internal successors, (1447), 935 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1447 transitions. [2021-12-17 15:51:08,495 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1447 transitions. Word has length 68 [2021-12-17 15:51:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:08,496 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1447 transitions. [2021-12-17 15:51:08,497 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) [2021-12-17 15:51:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1447 transitions. [2021-12-17 15:51:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 15:51:08,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:08,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:08,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:51:08,498 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash -571662380, now seen corresponding path program 1 times [2021-12-17 15:51:08,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:08,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771610030] [2021-12-17 15:51:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:08,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771610030] [2021-12-17 15:51:08,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771610030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:51:08,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528879980] [2021-12-17 15:51:08,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:51:08,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:51:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:51:08,581 INFO L87 Difference]: Start difference. First operand 936 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:08,741 INFO L93 Difference]: Finished difference Result 6324 states and 9901 transitions. [2021-12-17 15:51:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:51:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2021-12-17 15:51:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:08,757 INFO L225 Difference]: With dead ends: 6324 [2021-12-17 15:51:08,757 INFO L226 Difference]: Without dead ends: 5426 [2021-12-17 15:51:08,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:51:08,760 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1237 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:08,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 2014 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:51:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-12-17 15:51:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 1832. [2021-12-17 15:51:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 1.5417804478427088) internal successors, (2823), 1831 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2823 transitions. [2021-12-17 15:51:08,815 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2823 transitions. Word has length 69 [2021-12-17 15:51:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:08,816 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 2823 transitions. [2021-12-17 15:51:08,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2823 transitions. [2021-12-17 15:51:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 15:51:08,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:08,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:51:08,818 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -924987803, now seen corresponding path program 1 times [2021-12-17 15:51:08,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:08,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381978398] [2021-12-17 15:51:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:08,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:08,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381978398] [2021-12-17 15:51:08,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381978398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:08,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:08,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:51:08,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98166964] [2021-12-17 15:51:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:51:08,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:51:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:51:08,923 INFO L87 Difference]: Start difference. First operand 1832 states and 2823 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:09,150 INFO L93 Difference]: Finished difference Result 9874 states and 15148 transitions. [2021-12-17 15:51:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:51:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-17 15:51:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:09,174 INFO L225 Difference]: With dead ends: 9874 [2021-12-17 15:51:09,174 INFO L226 Difference]: Without dead ends: 8080 [2021-12-17 15:51:09,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:51:09,179 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 552 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:09,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 979 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:51:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-12-17 15:51:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 8072. [2021-12-17 15:51:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 1.5273200346921076) internal successors, (12327), 8071 states have internal predecessors, (12327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 12327 transitions. [2021-12-17 15:51:09,417 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 12327 transitions. Word has length 70 [2021-12-17 15:51:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:09,417 INFO L470 AbstractCegarLoop]: Abstraction has 8072 states and 12327 transitions. [2021-12-17 15:51:09,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 12327 transitions. [2021-12-17 15:51:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 15:51:09,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:09,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:51:09,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 810353873, now seen corresponding path program 1 times [2021-12-17 15:51:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840778724] [2021-12-17 15:51:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:09,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:09,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840778724] [2021-12-17 15:51:09,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840778724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:09,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:09,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:09,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123772028] [2021-12-17 15:51:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:09,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:09,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:09,458 INFO L87 Difference]: Start difference. First operand 8072 states and 12327 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:09,752 INFO L93 Difference]: Finished difference Result 21996 states and 33385 transitions. [2021-12-17 15:51:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-17 15:51:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:09,797 INFO L225 Difference]: With dead ends: 21996 [2021-12-17 15:51:09,797 INFO L226 Difference]: Without dead ends: 13962 [2021-12-17 15:51:09,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:09,810 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 395 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 [2021-12-17 15:51:09,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 395 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13962 states. [2021-12-17 15:51:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13962 to 13960. [2021-12-17 15:51:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13960 states, 13959 states have (on average 1.4997492657067124) internal successors, (20935), 13959 states have internal predecessors, (20935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13960 states to 13960 states and 20935 transitions. [2021-12-17 15:51:10,218 INFO L78 Accepts]: Start accepts. Automaton has 13960 states and 20935 transitions. Word has length 71 [2021-12-17 15:51:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 13960 states and 20935 transitions. [2021-12-17 15:51:10,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13960 states and 20935 transitions. [2021-12-17 15:51:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 15:51:10,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:10,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:10,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:51:10,221 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -241201943, now seen corresponding path program 1 times [2021-12-17 15:51:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:10,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472302829] [2021-12-17 15:51:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:10,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:10,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472302829] [2021-12-17 15:51:10,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472302829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:10,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:10,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 15:51:10,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707988724] [2021-12-17 15:51:10,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:10,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 15:51:10,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 15:51:10,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:51:10,357 INFO L87 Difference]: Start difference. First operand 13960 states and 20935 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:11,031 INFO L93 Difference]: Finished difference Result 29162 states and 43112 transitions. [2021-12-17 15:51:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:51:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-17 15:51:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:11,084 INFO L225 Difference]: With dead ends: 29162 [2021-12-17 15:51:11,084 INFO L226 Difference]: Without dead ends: 29160 [2021-12-17 15:51:11,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:51:11,094 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 951 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 824 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 [2021-12-17 15:51:11,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 824 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-12-17 15:51:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 14920. [2021-12-17 15:51:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14920 states, 14919 states have (on average 1.4675916616395202) internal successors, (21895), 14919 states have internal predecessors, (21895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14920 states to 14920 states and 21895 transitions. [2021-12-17 15:51:11,654 INFO L78 Accepts]: Start accepts. Automaton has 14920 states and 21895 transitions. Word has length 71 [2021-12-17 15:51:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:11,655 INFO L470 AbstractCegarLoop]: Abstraction has 14920 states and 21895 transitions. [2021-12-17 15:51:11,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14920 states and 21895 transitions. [2021-12-17 15:51:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 15:51:11,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:11,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:11,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:51:11,657 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1165253064, now seen corresponding path program 1 times [2021-12-17 15:51:11,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:11,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908201020] [2021-12-17 15:51:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:11,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:11,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908201020] [2021-12-17 15:51:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908201020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:11,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:11,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:11,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386227127] [2021-12-17 15:51:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:11,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:11,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:11,691 INFO L87 Difference]: Start difference. First operand 14920 states and 21895 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:12,188 INFO L93 Difference]: Finished difference Result 36446 states and 53547 transitions. [2021-12-17 15:51:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:12,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-17 15:51:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:12,222 INFO L225 Difference]: With dead ends: 36446 [2021-12-17 15:51:12,222 INFO L226 Difference]: Without dead ends: 21564 [2021-12-17 15:51:12,239 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 [2021-12-17 15:51:12,240 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 89 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:12,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 294 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21564 states. [2021-12-17 15:51:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21564 to 21418. [2021-12-17 15:51:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21418 states, 21417 states have (on average 1.4594481019750665) internal successors, (31257), 21417 states have internal predecessors, (31257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21418 states to 21418 states and 31257 transitions. [2021-12-17 15:51:12,950 INFO L78 Accepts]: Start accepts. Automaton has 21418 states and 31257 transitions. Word has length 72 [2021-12-17 15:51:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:12,950 INFO L470 AbstractCegarLoop]: Abstraction has 21418 states and 31257 transitions. [2021-12-17 15:51:12,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21418 states and 31257 transitions. [2021-12-17 15:51:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 15:51:12,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:12,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:12,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:51:12,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1893321424, now seen corresponding path program 1 times [2021-12-17 15:51:12,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795733013] [2021-12-17 15:51:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:12,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:13,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795733013] [2021-12-17 15:51:13,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795733013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:51:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810334549] [2021-12-17 15:51:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:13,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:51:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:51:13,119 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) [2021-12-17 15:51:13,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:51:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:51:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:51:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:51:13,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:51:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:51:13,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810334549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:51:13,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:51:13,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-17 15:51:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272801302] [2021-12-17 15:51:13,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:51:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 15:51:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 15:51:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 15:51:13,883 INFO L87 Difference]: Start difference. First operand 21418 states and 31257 transitions. Second operand has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:24,284 INFO L93 Difference]: Finished difference Result 281370 states and 409511 transitions. [2021-12-17 15:51:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-17 15:51:24,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 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 101 [2021-12-17 15:51:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:24,725 INFO L225 Difference]: With dead ends: 281370 [2021-12-17 15:51:24,725 INFO L226 Difference]: Without dead ends: 260600 [2021-12-17 15:51:24,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 15:51:24,804 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 8636 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8636 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:24,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8636 Valid, 4333 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 15:51:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260600 states. [2021-12-17 15:51:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260600 to 146770. [2021-12-17 15:51:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146770 states, 146769 states have (on average 1.4430635897226254) internal successors, (211797), 146769 states have internal predecessors, (211797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146770 states to 146770 states and 211797 transitions. [2021-12-17 15:51:30,919 INFO L78 Accepts]: Start accepts. Automaton has 146770 states and 211797 transitions. Word has length 101 [2021-12-17 15:51:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:30,919 INFO L470 AbstractCegarLoop]: Abstraction has 146770 states and 211797 transitions. [2021-12-17 15:51:30,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.642857142857142) internal successors, (289), 14 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 146770 states and 211797 transitions. [2021-12-17 15:51:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 15:51:30,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:30,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:30,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:51:31,147 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,SelfDestructingSolverStorable11 [2021-12-17 15:51:31,147 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 467391681, now seen corresponding path program 1 times [2021-12-17 15:51:31,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162710767] [2021-12-17 15:51:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:31,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:31,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:31,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162710767] [2021-12-17 15:51:31,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162710767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:31,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:31,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:31,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969349032] [2021-12-17 15:51:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:31,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:31,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:31,188 INFO L87 Difference]: Start difference. First operand 146770 states and 211797 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:37,341 INFO L93 Difference]: Finished difference Result 315430 states and 455515 transitions. [2021-12-17 15:51:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-12-17 15:51:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:37,725 INFO L225 Difference]: With dead ends: 315430 [2021-12-17 15:51:37,725 INFO L226 Difference]: Without dead ends: 219632 [2021-12-17 15:51:37,799 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 [2021-12-17 15:51:37,799 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 90 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:37,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 353 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219632 states.