./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.3.1.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 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:50:45,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:50:45,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:50:46,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:50:46,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:50:46,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:50:46,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:50:46,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:50:46,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:50:46,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:50:46,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:50:46,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:50:46,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:50:46,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:50:46,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:50:46,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:50:46,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:50:46,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:50:46,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:50:46,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:50:46,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:50:46,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:50:46,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:50:46,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:50:46,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:50:46,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:50:46,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:50:46,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:50:46,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:50:46,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:50:46,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:50:46,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:50:46,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:50:46,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:50:46,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:50:46,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:50:46,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:50:46,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:50:46,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:50:46,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:50:46,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:50:46,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:50:46,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:50:46,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:50:46,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:50:46,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:50:46,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:50:46,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:50:46,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:50:46,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:50:46,114 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:50:46,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:50:46,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:50:46,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:50:46,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:50:46,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:50:46,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:50:46,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:50:46,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:50:46,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:50:46,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:50:46,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:50:46,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:50:46,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:50:46,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:50:46,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:50:46,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:50:46,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:50:46,119 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:50:46,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:50:46,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:50:46,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 [2021-12-22 11:50:46,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:50:46,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:50:46,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:50:46,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:50:46,306 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:50:46,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:50:46,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd7aa6275/2a643b3e73b647f4b8ca5b53fba66b58/FLAG409a17814 [2021-12-22 11:50:46,717 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:50:46,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:50:46,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd7aa6275/2a643b3e73b647f4b8ca5b53fba66b58/FLAG409a17814 [2021-12-22 11:50:46,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd7aa6275/2a643b3e73b647f4b8ca5b53fba66b58 [2021-12-22 11:50:46,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:50:46,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:50:46,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:50:46,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:50:46,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:50:46,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:50:46" (1/1) ... [2021-12-22 11:50:46,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a923fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:46, skipping insertion in model container [2021-12-22 11:50:46,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:50:46" (1/1) ... [2021-12-22 11:50:46,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:50:46,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:50:46,948 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.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-12-22 11:50:46,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:50:46,961 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:50:46,996 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.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-12-22 11:50:46,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:50:47,006 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:50:47,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47 WrapperNode [2021-12-22 11:50:47,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:50:47,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:50:47,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:50:47,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:50:47,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,044 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 220 [2021-12-22 11:50:47,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:50:47,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:50:47,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:50:47,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:50:47,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:50:47,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:50:47,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:50:47,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:50:47,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (1/1) ... [2021-12-22 11:50:47,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:50:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:50:47,137 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) [2021-12-22 11:50:47,143 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 [2021-12-22 11:50:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:50:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:50:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:50:47,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:50:47,239 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:50:47,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:50:47,504 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:50:47,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:50:47,509 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:50:47,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:50:47 BoogieIcfgContainer [2021-12-22 11:50:47,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:50:47,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:50:47,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:50:47,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:50:47,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:50:46" (1/3) ... [2021-12-22 11:50:47,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734df58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:50:47, skipping insertion in model container [2021-12-22 11:50:47,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:47" (2/3) ... [2021-12-22 11:50:47,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734df58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:50:47, skipping insertion in model container [2021-12-22 11:50:47,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:50:47" (3/3) ... [2021-12-22 11:50:47,518 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:50:47,522 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:50:47,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:50:47,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:50:47,562 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 [2021-12-22 11:50:47,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:50:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 11:50:47,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:47,578 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] [2021-12-22 11:50:47,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2021-12-22 11:50:47,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:47,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628415679] [2021-12-22 11:50:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:47,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:47,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628415679] [2021-12-22 11:50:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628415679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:47,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:47,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:50:47,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180900958] [2021-12-22 11:50:47,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:47,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:50:47,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:50:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:50:47,809 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 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 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:47,826 INFO L93 Difference]: Finished difference Result 103 states and 167 transitions. [2021-12-22 11:50:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:50:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-22 11:50:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:47,835 INFO L225 Difference]: With dead ends: 103 [2021-12-22 11:50:47,835 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 11:50:47,837 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 [2021-12-22 11:50:47,840 INFO L933 BasicCegarLoop]: 97 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, 97 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 [2021-12-22 11:50:47,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 11:50:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 11:50:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2021-12-22 11:50:47,864 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 25 [2021-12-22 11:50:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2021-12-22 11:50:47,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2021-12-22 11:50:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 11:50:47,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:47,866 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] [2021-12-22 11:50:47,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:50:47,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2021-12-22 11:50:47,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684876558] [2021-12-22 11:50:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:47,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:47,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684876558] [2021-12-22 11:50:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684876558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:47,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:47,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815155282] [2021-12-22 11:50:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:47,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:47,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:47,949 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,011 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2021-12-22 11:50:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:50:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-22 11:50:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,013 INFO L225 Difference]: With dead ends: 102 [2021-12-22 11:50:48,013 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 11:50:48,014 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 [2021-12-22 11:50:48,015 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:48,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 11:50:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 11:50:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-12-22 11:50:48,022 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 25 [2021-12-22 11:50:48,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,023 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-12-22 11:50:48,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-12-22 11:50:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 11:50:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,025 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] [2021-12-22 11:50:48,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:50:48,026 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2021-12-22 11:50:48,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219963135] [2021-12-22 11:50:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219963135] [2021-12-22 11:50:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219963135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:48,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600969320] [2021-12-22 11:50:48,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:48,087 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,102 INFO L93 Difference]: Finished difference Result 130 states and 189 transitions. [2021-12-22 11:50:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-22 11:50:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,104 INFO L225 Difference]: With dead ends: 130 [2021-12-22 11:50:48,104 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 11:50:48,104 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 [2021-12-22 11:50:48,105 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 171 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 [2021-12-22 11:50:48,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 11:50:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-12-22 11:50:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2021-12-22 11:50:48,118 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 40 [2021-12-22 11:50:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,118 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2021-12-22 11:50:48,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2021-12-22 11:50:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 11:50:48,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,119 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] [2021-12-22 11:50:48,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:50:48,120 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2021-12-22 11:50:48,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423734553] [2021-12-22 11:50:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423734553] [2021-12-22 11:50:48,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423734553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:48,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860304969] [2021-12-22 11:50:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:48,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:48,185 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,206 INFO L93 Difference]: Finished difference Result 214 states and 320 transitions. [2021-12-22 11:50:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-22 11:50:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,208 INFO L225 Difference]: With dead ends: 214 [2021-12-22 11:50:48,208 INFO L226 Difference]: Without dead ends: 146 [2021-12-22 11:50:48,209 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 [2021-12-22 11:50:48,210 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 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 [2021-12-22 11:50:48,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-22 11:50:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-12-22 11:50:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2021-12-22 11:50:48,224 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 40 [2021-12-22 11:50:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,225 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2021-12-22 11:50:48,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2021-12-22 11:50:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 11:50:48,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,226 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] [2021-12-22 11:50:48,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:50:48,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2021-12-22 11:50:48,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48689021] [2021-12-22 11:50:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48689021] [2021-12-22 11:50:48,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48689021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:48,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932955273] [2021-12-22 11:50:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:48,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:48,308 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,411 INFO L93 Difference]: Finished difference Result 876 states and 1345 transitions. [2021-12-22 11:50:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:50:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-22 11:50:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,423 INFO L225 Difference]: With dead ends: 876 [2021-12-22 11:50:48,423 INFO L226 Difference]: Without dead ends: 754 [2021-12-22 11:50:48,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:50:48,426 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 376 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:48,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 495 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-22 11:50:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 264. [2021-12-22 11:50:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 263 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 391 transitions. [2021-12-22 11:50:48,465 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 391 transitions. Word has length 40 [2021-12-22 11:50:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 391 transitions. [2021-12-22 11:50:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 391 transitions. [2021-12-22 11:50:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 11:50:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,467 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] [2021-12-22 11:50:48,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:50:48,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2021-12-22 11:50:48,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382683618] [2021-12-22 11:50:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382683618] [2021-12-22 11:50:48,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382683618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:48,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101975302] [2021-12-22 11:50:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:48,522 INFO L87 Difference]: Start difference. First operand 264 states and 391 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,552 INFO L93 Difference]: Finished difference Result 704 states and 1053 transitions. [2021-12-22 11:50:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-22 11:50:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,555 INFO L225 Difference]: With dead ends: 704 [2021-12-22 11:50:48,555 INFO L226 Difference]: Without dead ends: 462 [2021-12-22 11:50:48,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:48,556 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:48,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-22 11:50:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 452. [2021-12-22 11:50:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.4523281596452329) internal successors, (655), 451 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 655 transitions. [2021-12-22 11:50:48,587 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 655 transitions. Word has length 42 [2021-12-22 11:50:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,588 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 655 transitions. [2021-12-22 11:50:48,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 655 transitions. [2021-12-22 11:50:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 11:50:48,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,589 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] [2021-12-22 11:50:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:50:48,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2021-12-22 11:50:48,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032523289] [2021-12-22 11:50:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032523289] [2021-12-22 11:50:48,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032523289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:48,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33665846] [2021-12-22 11:50:48,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:48,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:48,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:48,690 INFO L87 Difference]: Start difference. First operand 452 states and 655 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,744 INFO L93 Difference]: Finished difference Result 884 states and 1289 transitions. [2021-12-22 11:50:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:50:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-22 11:50:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,748 INFO L225 Difference]: With dead ends: 884 [2021-12-22 11:50:48,748 INFO L226 Difference]: Without dead ends: 454 [2021-12-22 11:50:48,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:48,751 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 168 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:48,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 187 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-22 11:50:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2021-12-22 11:50:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.434589800443459) internal successors, (647), 451 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 647 transitions. [2021-12-22 11:50:48,775 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 647 transitions. Word has length 42 [2021-12-22 11:50:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 647 transitions. [2021-12-22 11:50:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 647 transitions. [2021-12-22 11:50:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 11:50:48,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:48,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:50:48,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2021-12-22 11:50:48,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519196651] [2021-12-22 11:50:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:48,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:48,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519196651] [2021-12-22 11:50:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519196651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:48,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:48,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:48,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8209123] [2021-12-22 11:50:48,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:48,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:48,862 INFO L87 Difference]: Start difference. First operand 452 states and 647 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:48,926 INFO L93 Difference]: Finished difference Result 786 states and 1119 transitions. [2021-12-22 11:50:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:50:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 11:50:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:48,930 INFO L225 Difference]: With dead ends: 786 [2021-12-22 11:50:48,930 INFO L226 Difference]: Without dead ends: 784 [2021-12-22 11:50:48,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:50:48,932 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 362 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-22 11:50:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 476. [2021-12-22 11:50:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.4042105263157896) internal successors, (667), 475 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 667 transitions. [2021-12-22 11:50:48,972 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 667 transitions. Word has length 43 [2021-12-22 11:50:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:48,974 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 667 transitions. [2021-12-22 11:50:48,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 667 transitions. [2021-12-22 11:50:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 11:50:48,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:48,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:50:48,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2021-12-22 11:50:48,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940560943] [2021-12-22 11:50:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:48,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:49,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940560943] [2021-12-22 11:50:49,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940560943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:49,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:49,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:49,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698213221] [2021-12-22 11:50:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:49,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:49,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:49,017 INFO L87 Difference]: Start difference. First operand 476 states and 667 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:49,059 INFO L93 Difference]: Finished difference Result 947 states and 1345 transitions. [2021-12-22 11:50:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 11:50:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:49,063 INFO L225 Difference]: With dead ends: 947 [2021-12-22 11:50:49,063 INFO L226 Difference]: Without dead ends: 680 [2021-12-22 11:50:49,064 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 [2021-12-22 11:50:49,065 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 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 [2021-12-22 11:50:49,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-22 11:50:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2021-12-22 11:50:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.395864106351551) internal successors, (945), 677 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 945 transitions. [2021-12-22 11:50:49,101 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 945 transitions. Word has length 44 [2021-12-22 11:50:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:49,101 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 945 transitions. [2021-12-22 11:50:49,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 945 transitions. [2021-12-22 11:50:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:50:49,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:49,104 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] [2021-12-22 11:50:49,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:50:49,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1290367787, now seen corresponding path program 1 times [2021-12-22 11:50:49,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246138015] [2021-12-22 11:50:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:49,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:50:49,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246138015] [2021-12-22 11:50:49,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246138015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:49,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:49,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:49,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428600725] [2021-12-22 11:50:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:49,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:49,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:49,181 INFO L87 Difference]: Start difference. First operand 678 states and 945 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:49,334 INFO L93 Difference]: Finished difference Result 2782 states and 3897 transitions. [2021-12-22 11:50:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:50:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 11:50:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:49,340 INFO L225 Difference]: With dead ends: 2782 [2021-12-22 11:50:49,340 INFO L226 Difference]: Without dead ends: 2128 [2021-12-22 11:50:49,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:50:49,341 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 206 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:49,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 327 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-12-22 11:50:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1330. [2021-12-22 11:50:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 1.3942814145974416) internal successors, (1853), 1329 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1853 transitions. [2021-12-22 11:50:49,409 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1853 transitions. Word has length 63 [2021-12-22 11:50:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:49,410 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1853 transitions. [2021-12-22 11:50:49,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1853 transitions. [2021-12-22 11:50:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:50:49,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:49,411 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] [2021-12-22 11:50:49,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:50:49,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -478415029, now seen corresponding path program 1 times [2021-12-22 11:50:49,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728602463] [2021-12-22 11:50:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:49,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:50:49,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728602463] [2021-12-22 11:50:49,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728602463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:49,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:49,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:49,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826784663] [2021-12-22 11:50:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:49,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:49,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:49,472 INFO L87 Difference]: Start difference. First operand 1330 states and 1853 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:49,637 INFO L93 Difference]: Finished difference Result 3434 states and 4805 transitions. [2021-12-22 11:50:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:50:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 11:50:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:49,646 INFO L225 Difference]: With dead ends: 3434 [2021-12-22 11:50:49,646 INFO L226 Difference]: Without dead ends: 2780 [2021-12-22 11:50:49,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:50:49,649 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 200 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:49,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 342 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-12-22 11:50:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2310. [2021-12-22 11:50:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 2309 states have (on average 1.3880467734950195) internal successors, (3205), 2309 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3205 transitions. [2021-12-22 11:50:49,786 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3205 transitions. Word has length 63 [2021-12-22 11:50:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:49,787 INFO L470 AbstractCegarLoop]: Abstraction has 2310 states and 3205 transitions. [2021-12-22 11:50:49,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3205 transitions. [2021-12-22 11:50:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:50:49,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:49,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:49,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:50:49,790 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1743655043, now seen corresponding path program 1 times [2021-12-22 11:50:49,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:49,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945815591] [2021-12-22 11:50:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:49,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:49,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945815591] [2021-12-22 11:50:49,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945815591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:49,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:49,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:49,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304671878] [2021-12-22 11:50:49,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:49,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:49,837 INFO L87 Difference]: Start difference. First operand 2310 states and 3205 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) [2021-12-22 11:50:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:49,941 INFO L93 Difference]: Finished difference Result 3960 states and 5529 transitions. [2021-12-22 11:50:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:49,941 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 [2021-12-22 11:50:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:49,946 INFO L225 Difference]: With dead ends: 3960 [2021-12-22 11:50:49,946 INFO L226 Difference]: Without dead ends: 1674 [2021-12-22 11:50:49,950 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 [2021-12-22 11:50:49,951 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:49,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 170 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-12-22 11:50:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1672. [2021-12-22 11:50:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.3871932974266905) internal successors, (2318), 1671 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2318 transitions. [2021-12-22 11:50:50,027 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2318 transitions. Word has length 65 [2021-12-22 11:50:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:50,028 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2318 transitions. [2021-12-22 11:50:50,028 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) [2021-12-22 11:50:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2318 transitions. [2021-12-22 11:50:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:50:50,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:50,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:50,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:50:50,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1575580592, now seen corresponding path program 1 times [2021-12-22 11:50:50,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:50,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091707576] [2021-12-22 11:50:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:50,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:50:50,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091707576] [2021-12-22 11:50:50,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091707576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:50,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:50,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:50,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356694612] [2021-12-22 11:50:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:50,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:50:50,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:50:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:50:50,072 INFO L87 Difference]: Start difference. First operand 1672 states and 2318 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:50,212 INFO L93 Difference]: Finished difference Result 3072 states and 4290 transitions. [2021-12-22 11:50:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:50:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-22 11:50:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:50,219 INFO L225 Difference]: With dead ends: 3072 [2021-12-22 11:50:50,219 INFO L226 Difference]: Without dead ends: 2606 [2021-12-22 11:50:50,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:50:50,221 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 199 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:50,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 318 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-12-22 11:50:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2136. [2021-12-22 11:50:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 1.3892271662763467) internal successors, (2966), 2135 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2966 transitions. [2021-12-22 11:50:50,322 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2966 transitions. Word has length 65 [2021-12-22 11:50:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:50,323 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 2966 transitions. [2021-12-22 11:50:50,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2966 transitions. [2021-12-22 11:50:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:50:50,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:50,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:50,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:50:50,324 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1779322747, now seen corresponding path program 1 times [2021-12-22 11:50:50,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:50,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077436093] [2021-12-22 11:50:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:50,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:50,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077436093] [2021-12-22 11:50:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077436093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:50:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709083299] [2021-12-22 11:50:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:50,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:50:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:50:50,570 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) [2021-12-22 11:50:50,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:50:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:50:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:50:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:50:50,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:50:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709083299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:50:51,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:50:51,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-22 11:50:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899344333] [2021-12-22 11:50:51,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:50:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 11:50:51,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 11:50:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:50:51,160 INFO L87 Difference]: Start difference. First operand 2136 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:55,327 INFO L93 Difference]: Finished difference Result 22516 states and 30811 transitions. [2021-12-22 11:50:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-22 11:50:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 0 states have call successors, (0), 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 [2021-12-22 11:50:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:55,381 INFO L225 Difference]: With dead ends: 22516 [2021-12-22 11:50:55,381 INFO L226 Difference]: Without dead ends: 20426 [2021-12-22 11:50:55,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2148, Invalid=10062, Unknown=0, NotChecked=0, Total=12210 [2021-12-22 11:50:55,392 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2624 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:55,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 1016 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 11:50:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-12-22 11:50:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 11049. [2021-12-22 11:50:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 11048 states have (on average 1.3344496741491674) internal successors, (14743), 11048 states have internal predecessors, (14743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 14743 transitions. [2021-12-22 11:50:56,152 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 14743 transitions. Word has length 66 [2021-12-22 11:50:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 11049 states and 14743 transitions. [2021-12-22 11:50:56,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 18 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 14743 transitions. [2021-12-22 11:50:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:50:56,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:56,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:56,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 11:50:56,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 11:50:56,374 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 388109306, now seen corresponding path program 1 times [2021-12-22 11:50:56,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325836293] [2021-12-22 11:50:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:56,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:56,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:56,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325836293] [2021-12-22 11:50:56,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325836293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:50:56,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025825534] [2021-12-22 11:50:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:56,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:50:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:50:56,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:50:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:50:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 11:50:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:50:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:57,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:50:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:57,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025825534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:50:57,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:50:57,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-22 11:50:57,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621270179] [2021-12-22 11:50:57,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:50:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 11:50:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 11:50:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-22 11:50:57,518 INFO L87 Difference]: Start difference. First operand 11049 states and 14743 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:01,419 INFO L93 Difference]: Finished difference Result 52970 states and 70208 transitions. [2021-12-22 11:51:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 11:51:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2021-12-22 11:51:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:01,496 INFO L225 Difference]: With dead ends: 52970 [2021-12-22 11:51:01,497 INFO L226 Difference]: Without dead ends: 44113 [2021-12-22 11:51:01,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 11:51:01,518 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1610 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:01,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 966 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:51:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44113 states. [2021-12-22 11:51:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44113 to 25469. [2021-12-22 11:51:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 1.328333595099733) internal successors, (33830), 25468 states have internal predecessors, (33830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 33830 transitions. [2021-12-22 11:51:03,824 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 33830 transitions. Word has length 67 [2021-12-22 11:51:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 25469 states and 33830 transitions. [2021-12-22 11:51:03,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 33830 transitions. [2021-12-22 11:51:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:51:03,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:03,826 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] [2021-12-22 11:51:03,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:51:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 11:51:04,032 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -162688112, now seen corresponding path program 1 times [2021-12-22 11:51:04,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759190347] [2021-12-22 11:51:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:04,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:04,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759190347] [2021-12-22 11:51:04,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759190347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:04,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:04,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:04,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103314013] [2021-12-22 11:51:04,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:04,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:04,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:04,065 INFO L87 Difference]: Start difference. First operand 25469 states and 33830 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) [2021-12-22 11:51:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:05,015 INFO L93 Difference]: Finished difference Result 36510 states and 48440 transitions. [2021-12-22 11:51:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:05,015 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 [2021-12-22 11:51:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:05,038 INFO L225 Difference]: With dead ends: 36510 [2021-12-22 11:51:05,038 INFO L226 Difference]: Without dead ends: 13368 [2021-12-22 11:51:05,061 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 [2021-12-22 11:51:05,061 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:05,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 152 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13368 states. [2021-12-22 11:51:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13368 to 13132. [2021-12-22 11:51:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13132 states, 13131 states have (on average 1.2964739928413678) internal successors, (17024), 13131 states have internal predecessors, (17024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13132 states to 13132 states and 17024 transitions. [2021-12-22 11:51:06,042 INFO L78 Accepts]: Start accepts. Automaton has 13132 states and 17024 transitions. Word has length 67 [2021-12-22 11:51:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:06,043 INFO L470 AbstractCegarLoop]: Abstraction has 13132 states and 17024 transitions. [2021-12-22 11:51:06,043 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) [2021-12-22 11:51:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 13132 states and 17024 transitions. [2021-12-22 11:51:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:51:06,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:06,046 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] [2021-12-22 11:51:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:51:06,047 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1410195728, now seen corresponding path program 1 times [2021-12-22 11:51:06,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:06,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888457064] [2021-12-22 11:51:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:06,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:06,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:06,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888457064] [2021-12-22 11:51:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888457064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:06,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:06,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:06,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315759863] [2021-12-22 11:51:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:06,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:06,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:06,085 INFO L87 Difference]: Start difference. First operand 13132 states and 17024 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) [2021-12-22 11:51:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:06,604 INFO L93 Difference]: Finished difference Result 20015 states and 25897 transitions. [2021-12-22 11:51:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:06,604 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 [2021-12-22 11:51:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:06,618 INFO L225 Difference]: With dead ends: 20015 [2021-12-22 11:51:06,618 INFO L226 Difference]: Without dead ends: 8555 [2021-12-22 11:51:06,631 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 [2021-12-22 11:51:06,632 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 20 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:06,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2021-12-22 11:51:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 8553. [2021-12-22 11:51:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8553 states, 8552 states have (on average 1.2593545369504209) internal successors, (10770), 8552 states have internal predecessors, (10770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8553 states to 8553 states and 10770 transitions. [2021-12-22 11:51:07,460 INFO L78 Accepts]: Start accepts. Automaton has 8553 states and 10770 transitions. Word has length 67 [2021-12-22 11:51:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:07,461 INFO L470 AbstractCegarLoop]: Abstraction has 8553 states and 10770 transitions. [2021-12-22 11:51:07,461 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) [2021-12-22 11:51:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8553 states and 10770 transitions. [2021-12-22 11:51:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:51:07,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:07,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:07,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:51:07,462 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash -491051046, now seen corresponding path program 1 times [2021-12-22 11:51:07,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:07,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987797683] [2021-12-22 11:51:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:07,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:07,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987797683] [2021-12-22 11:51:07,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987797683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:51:07,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128254252] [2021-12-22 11:51:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:07,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:51:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:51:07,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:51:07,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:51:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-22 11:51:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:51:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:09,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:51:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:10,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128254252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:51:10,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:51:10,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 16] total 39 [2021-12-22 11:51:10,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109632839] [2021-12-22 11:51:10,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:51:10,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-22 11:51:10,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-22 11:51:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 11:51:10,748 INFO L87 Difference]: Start difference. First operand 8553 states and 10770 transitions. Second operand has 39 states, 39 states have (on average 4.615384615384615) internal successors, (180), 39 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)