./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:37:06,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:37:06,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:37:06,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:37:06,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:37:06,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:37:06,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:37:06,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:37:06,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:37:06,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:37:06,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:37:06,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:37:06,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:37:06,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:37:06,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:37:06,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:37:06,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:37:06,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:37:06,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:37:06,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:37:06,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:37:06,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:37:06,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:37:06,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:37:06,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:37:06,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:37:06,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:37:06,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:37:06,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:37:06,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:37:06,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:37:06,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:37:06,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:37:06,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:37:06,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:37:06,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:37:06,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:37:06,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:37:06,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:37:06,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:37:06,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:37:06,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:37:06,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:37:06,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:37:06,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:37:06,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:37:06,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:37:06,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:37:06,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:37:06,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:37:06,298 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:37:06,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:37:06,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:37:06,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:37:06,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:37:06,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:37:06,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:37:06,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:37:06,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:37:06,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:37:06,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:37:06,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:37:06,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:37:06,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:37:06,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:37:06,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:37:06,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:37:06,303 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:37:06,303 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:37:06,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:37:06,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:37:06,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 725c5f8c833c7945922f02dcce7a19d2486080a25ed300fe3444b2b9ce738b5e [2021-12-16 01:37:06,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:37:06,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:37:06,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:37:06,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:37:06,542 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:37:06,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-16 01:37:06,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912d18f1c/b88fe0fe391d430d90063cc0e1929ab0/FLAG2c2d1208b [2021-12-16 01:37:06,993 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:37:06,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-16 01:37:07,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912d18f1c/b88fe0fe391d430d90063cc0e1929ab0/FLAG2c2d1208b [2021-12-16 01:37:07,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/912d18f1c/b88fe0fe391d430d90063cc0e1929ab0 [2021-12-16 01:37:07,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:37:07,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:37:07,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:37:07,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:37:07,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:37:07,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc274f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07, skipping insertion in model container [2021-12-16 01:37:07,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:37:07,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:37:07,588 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-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2021-12-16 01:37:07,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:37:07,644 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:37:07,676 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-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7638,7651] [2021-12-16 01:37:07,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:37:07,700 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:37:07,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07 WrapperNode [2021-12-16 01:37:07,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:37:07,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:37:07,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:37:07,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:37:07,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,754 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 615 [2021-12-16 01:37:07,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:37:07,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:37:07,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:37:07,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:37:07,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:37:07,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:37:07,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:37:07,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:37:07,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (1/1) ... [2021-12-16 01:37:07,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:37:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:37:07,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 01:37:07,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 01:37:07,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:37:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:37:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:37:07,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:37:07,937 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:37:07,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:37:08,399 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:37:08,405 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:37:08,405 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 01:37:08,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:37:08 BoogieIcfgContainer [2021-12-16 01:37:08,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:37:08,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:37:08,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:37:08,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:37:08,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:37:07" (1/3) ... [2021-12-16 01:37:08,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782be7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:37:08, skipping insertion in model container [2021-12-16 01:37:08,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:37:07" (2/3) ... [2021-12-16 01:37:08,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782be7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:37:08, skipping insertion in model container [2021-12-16 01:37:08,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:37:08" (3/3) ... [2021-12-16 01:37:08,414 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-16 01:37:08,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:37:08,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:37:08,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:37:08,472 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 01:37:08,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:37:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.75177304964539) internal successors, (247), 142 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 01:37:08,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:08,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:08,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash -463597657, now seen corresponding path program 1 times [2021-12-16 01:37:08,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:08,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319595774] [2021-12-16 01:37:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:08,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:08,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:08,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319595774] [2021-12-16 01:37:08,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319595774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:08,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:08,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:08,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955246456] [2021-12-16 01:37:08,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:08,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:08,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:08,827 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.75177304964539) internal successors, (247), 142 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:08,917 INFO L93 Difference]: Finished difference Result 317 states and 535 transitions. [2021-12-16 01:37:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:08,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-16 01:37:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:08,931 INFO L225 Difference]: With dead ends: 317 [2021-12-16 01:37:08,932 INFO L226 Difference]: Without dead ends: 219 [2021-12-16 01:37:08,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:08,938 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 144 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:08,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 440 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-16 01:37:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2021-12-16 01:37:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.587962962962963) internal successors, (343), 216 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 343 transitions. [2021-12-16 01:37:08,996 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 343 transitions. Word has length 56 [2021-12-16 01:37:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:08,996 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 343 transitions. [2021-12-16 01:37:08,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 343 transitions. [2021-12-16 01:37:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 01:37:09,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:09,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:09,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:37:09,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash -452034936, now seen corresponding path program 1 times [2021-12-16 01:37:09,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920913509] [2021-12-16 01:37:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:09,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:09,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:09,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920913509] [2021-12-16 01:37:09,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920913509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:09,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:09,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:09,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423282422] [2021-12-16 01:37:09,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:09,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:09,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:09,108 INFO L87 Difference]: Start difference. First operand 217 states and 343 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:09,146 INFO L93 Difference]: Finished difference Result 533 states and 863 transitions. [2021-12-16 01:37:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:09,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 58 [2021-12-16 01:37:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:09,149 INFO L225 Difference]: With dead ends: 533 [2021-12-16 01:37:09,149 INFO L226 Difference]: Without dead ends: 367 [2021-12-16 01:37:09,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:09,156 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 125 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:09,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 409 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-16 01:37:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-12-16 01:37:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.60989010989011) internal successors, (586), 364 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 586 transitions. [2021-12-16 01:37:09,190 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 586 transitions. Word has length 58 [2021-12-16 01:37:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 586 transitions. [2021-12-16 01:37:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 586 transitions. [2021-12-16 01:37:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 01:37:09,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:09,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:09,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:37:09,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1416370665, now seen corresponding path program 1 times [2021-12-16 01:37:09,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045262045] [2021-12-16 01:37:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:09,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:09,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045262045] [2021-12-16 01:37:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045262045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:09,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6133717] [2021-12-16 01:37:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:09,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:09,284 INFO L87 Difference]: Start difference. First operand 365 states and 586 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:09,303 INFO L93 Difference]: Finished difference Result 961 states and 1564 transitions. [2021-12-16 01:37:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-16 01:37:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:09,307 INFO L225 Difference]: With dead ends: 961 [2021-12-16 01:37:09,307 INFO L226 Difference]: Without dead ends: 647 [2021-12-16 01:37:09,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:09,313 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 119 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:09,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 410 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-12-16 01:37:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2021-12-16 01:37:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.6180124223602483) internal successors, (1042), 644 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2021-12-16 01:37:09,339 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 60 [2021-12-16 01:37:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:09,341 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2021-12-16 01:37:09,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2021-12-16 01:37:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 01:37:09,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:09,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:09,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:37:09,342 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2105142966, now seen corresponding path program 1 times [2021-12-16 01:37:09,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657781348] [2021-12-16 01:37:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:09,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:09,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657781348] [2021-12-16 01:37:09,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657781348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:09,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:09,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:09,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768148623] [2021-12-16 01:37:09,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:09,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:09,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:09,415 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:09,596 INFO L93 Difference]: Finished difference Result 2801 states and 4612 transitions. [2021-12-16 01:37:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:37:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-16 01:37:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:09,606 INFO L225 Difference]: With dead ends: 2801 [2021-12-16 01:37:09,608 INFO L226 Difference]: Without dead ends: 2207 [2021-12-16 01:37:09,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:37:09,614 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 856 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:09,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1594 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:37:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-12-16 01:37:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1164. [2021-12-16 01:37:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 1.6268271711092004) internal successors, (1892), 1163 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1892 transitions. [2021-12-16 01:37:09,665 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1892 transitions. Word has length 62 [2021-12-16 01:37:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:09,666 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1892 transitions. [2021-12-16 01:37:09,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1892 transitions. [2021-12-16 01:37:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 01:37:09,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:09,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:09,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:37:09,669 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash -897426710, now seen corresponding path program 1 times [2021-12-16 01:37:09,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:09,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119352896] [2021-12-16 01:37:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:09,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:09,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119352896] [2021-12-16 01:37:09,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119352896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:09,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:09,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:37:09,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878736797] [2021-12-16 01:37:09,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:09,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:37:09,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:37:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:37:09,749 INFO L87 Difference]: Start difference. First operand 1164 states and 1892 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:09,845 INFO L93 Difference]: Finished difference Result 3403 states and 5593 transitions. [2021-12-16 01:37:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:37:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-16 01:37:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:09,854 INFO L225 Difference]: With dead ends: 3403 [2021-12-16 01:37:09,854 INFO L226 Difference]: Without dead ends: 2290 [2021-12-16 01:37:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:09,857 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 430 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:09,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 737 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-12-16 01:37:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1718. [2021-12-16 01:37:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 1.6319161327897496) internal successors, (2802), 1717 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2802 transitions. [2021-12-16 01:37:09,927 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2802 transitions. Word has length 63 [2021-12-16 01:37:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 2802 transitions. [2021-12-16 01:37:09,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2802 transitions. [2021-12-16 01:37:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 01:37:09,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:09,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:09,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:37:09,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -384729531, now seen corresponding path program 1 times [2021-12-16 01:37:09,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:09,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648428429] [2021-12-16 01:37:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:09,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:09,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648428429] [2021-12-16 01:37:09,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648428429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:09,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:09,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:09,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782825180] [2021-12-16 01:37:09,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:09,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:09,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:09,976 INFO L87 Difference]: Start difference. First operand 1718 states and 2802 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:10,057 INFO L93 Difference]: Finished difference Result 3773 states and 6212 transitions. [2021-12-16 01:37:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-12-16 01:37:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:10,067 INFO L225 Difference]: With dead ends: 3773 [2021-12-16 01:37:10,068 INFO L226 Difference]: Without dead ends: 2585 [2021-12-16 01:37:10,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:10,071 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 132 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:10,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 500 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-12-16 01:37:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2583. [2021-12-16 01:37:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2582 states have (on average 1.6347792408985282) internal successors, (4221), 2582 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4221 transitions. [2021-12-16 01:37:10,180 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4221 transitions. Word has length 64 [2021-12-16 01:37:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 4221 transitions. [2021-12-16 01:37:10,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4221 transitions. [2021-12-16 01:37:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 01:37:10,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:10,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:10,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:37:10,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1071619613, now seen corresponding path program 1 times [2021-12-16 01:37:10,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:10,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910626232] [2021-12-16 01:37:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:10,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:10,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:10,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910626232] [2021-12-16 01:37:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910626232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:10,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902033612] [2021-12-16 01:37:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:10,231 INFO L87 Difference]: Start difference. First operand 2583 states and 4221 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:10,315 INFO L93 Difference]: Finished difference Result 5027 states and 8240 transitions. [2021-12-16 01:37:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:10,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-12-16 01:37:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:10,326 INFO L225 Difference]: With dead ends: 5027 [2021-12-16 01:37:10,327 INFO L226 Difference]: Without dead ends: 3593 [2021-12-16 01:37:10,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:10,332 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 126 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:10,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 486 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-16 01:37:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3591. [2021-12-16 01:37:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3590 states have (on average 1.6298050139275766) internal successors, (5851), 3590 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 5851 transitions. [2021-12-16 01:37:10,455 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 5851 transitions. Word has length 64 [2021-12-16 01:37:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 3591 states and 5851 transitions. [2021-12-16 01:37:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 5851 transitions. [2021-12-16 01:37:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 01:37:10,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:10,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:10,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:37:10,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2108370415, now seen corresponding path program 1 times [2021-12-16 01:37:10,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263382367] [2021-12-16 01:37:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:10,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:10,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263382367] [2021-12-16 01:37:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263382367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:10,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:10,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:37:10,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226107868] [2021-12-16 01:37:10,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:10,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:37:10,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:37:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:37:10,495 INFO L87 Difference]: Start difference. First operand 3591 states and 5851 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:10,697 INFO L93 Difference]: Finished difference Result 11297 states and 18469 transitions. [2021-12-16 01:37:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:37:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 64 [2021-12-16 01:37:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:10,724 INFO L225 Difference]: With dead ends: 11297 [2021-12-16 01:37:10,724 INFO L226 Difference]: Without dead ends: 7775 [2021-12-16 01:37:10,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:10,732 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 429 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:10,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 729 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7775 states. [2021-12-16 01:37:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7775 to 5664. [2021-12-16 01:37:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 1.6238742715874979) internal successors, (9196), 5663 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 9196 transitions. [2021-12-16 01:37:10,969 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 9196 transitions. Word has length 64 [2021-12-16 01:37:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:10,969 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 9196 transitions. [2021-12-16 01:37:10,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 9196 transitions. [2021-12-16 01:37:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 01:37:10,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:10,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:37:10,970 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2012593663, now seen corresponding path program 1 times [2021-12-16 01:37:10,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:10,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251339598] [2021-12-16 01:37:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:10,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251339598] [2021-12-16 01:37:10,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251339598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:10,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:10,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:10,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290681878] [2021-12-16 01:37:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:10,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:10,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:10,998 INFO L87 Difference]: Start difference. First operand 5664 states and 9196 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:11,184 INFO L93 Difference]: Finished difference Result 11084 states and 18033 transitions. [2021-12-16 01:37:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-12-16 01:37:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:11,207 INFO L225 Difference]: With dead ends: 11084 [2021-12-16 01:37:11,208 INFO L226 Difference]: Without dead ends: 7832 [2021-12-16 01:37:11,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:11,214 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 120 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:11,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 463 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2021-12-16 01:37:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7830. [2021-12-16 01:37:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 7829 states have (on average 1.6157874568910462) internal successors, (12650), 7829 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 12650 transitions. [2021-12-16 01:37:11,502 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 12650 transitions. Word has length 64 [2021-12-16 01:37:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:11,503 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 12650 transitions. [2021-12-16 01:37:11,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 12650 transitions. [2021-12-16 01:37:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 01:37:11,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:11,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:37:11,504 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -988361583, now seen corresponding path program 1 times [2021-12-16 01:37:11,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:11,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651382982] [2021-12-16 01:37:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:11,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:11,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:11,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651382982] [2021-12-16 01:37:11,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651382982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:11,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:11,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:37:11,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268600249] [2021-12-16 01:37:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:11,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:37:11,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:37:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:37:11,537 INFO L87 Difference]: Start difference. First operand 7830 states and 12650 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:12,052 INFO L93 Difference]: Finished difference Result 24459 states and 39607 transitions. [2021-12-16 01:37:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:37:12,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-16 01:37:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:12,094 INFO L225 Difference]: With dead ends: 24459 [2021-12-16 01:37:12,095 INFO L226 Difference]: Without dead ends: 16714 [2021-12-16 01:37:12,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:12,111 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 427 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:12,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 716 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2021-12-16 01:37:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 12229. [2021-12-16 01:37:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 1.6075400719659798) internal successors, (19657), 12228 states have internal predecessors, (19657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 19657 transitions. [2021-12-16 01:37:12,553 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 19657 transitions. Word has length 65 [2021-12-16 01:37:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:12,553 INFO L470 AbstractCegarLoop]: Abstraction has 12229 states and 19657 transitions. [2021-12-16 01:37:12,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 19657 transitions. [2021-12-16 01:37:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 01:37:12,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:12,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:37:12,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2145020638, now seen corresponding path program 1 times [2021-12-16 01:37:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308185802] [2021-12-16 01:37:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:12,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:12,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308185802] [2021-12-16 01:37:12,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308185802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:12,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:12,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:12,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346607837] [2021-12-16 01:37:12,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:12,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:12,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:12,693 INFO L87 Difference]: Start difference. First operand 12229 states and 19657 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:13,257 INFO L93 Difference]: Finished difference Result 24375 states and 39196 transitions. [2021-12-16 01:37:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:37:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-16 01:37:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:13,368 INFO L225 Difference]: With dead ends: 24375 [2021-12-16 01:37:13,368 INFO L226 Difference]: Without dead ends: 12231 [2021-12-16 01:37:13,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:37:13,379 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 428 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:13,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 588 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:37:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12231 states. [2021-12-16 01:37:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12231 to 12229. [2021-12-16 01:37:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 1.597317631665031) internal successors, (19532), 12228 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 19532 transitions. [2021-12-16 01:37:13,831 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 19532 transitions. Word has length 67 [2021-12-16 01:37:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:13,831 INFO L470 AbstractCegarLoop]: Abstraction has 12229 states and 19532 transitions. [2021-12-16 01:37:13,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 19532 transitions. [2021-12-16 01:37:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 01:37:13,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:13,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:13,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:37:13,833 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 460006403, now seen corresponding path program 1 times [2021-12-16 01:37:13,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045235252] [2021-12-16 01:37:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:13,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:13,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045235252] [2021-12-16 01:37:13,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045235252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:13,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:13,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:13,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388884756] [2021-12-16 01:37:13,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:13,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:13,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:13,903 INFO L87 Difference]: Start difference. First operand 12229 states and 19532 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:14,647 INFO L93 Difference]: Finished difference Result 35007 states and 56056 transitions. [2021-12-16 01:37:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:37:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-16 01:37:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:14,689 INFO L225 Difference]: With dead ends: 35007 [2021-12-16 01:37:14,689 INFO L226 Difference]: Without dead ends: 22863 [2021-12-16 01:37:14,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:37:14,707 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 422 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:14,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 595 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22863 states. [2021-12-16 01:37:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22863 to 22861. [2021-12-16 01:37:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22861 states, 22860 states have (on average 1.585870516185477) internal successors, (36253), 22860 states have internal predecessors, (36253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22861 states to 22861 states and 36253 transitions. [2021-12-16 01:37:15,732 INFO L78 Accepts]: Start accepts. Automaton has 22861 states and 36253 transitions. Word has length 70 [2021-12-16 01:37:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:15,733 INFO L470 AbstractCegarLoop]: Abstraction has 22861 states and 36253 transitions. [2021-12-16 01:37:15,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22861 states and 36253 transitions. [2021-12-16 01:37:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-16 01:37:15,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:15,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:15,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:37:15,734 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1373387295, now seen corresponding path program 1 times [2021-12-16 01:37:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115324979] [2021-12-16 01:37:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:15,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:15,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:15,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115324979] [2021-12-16 01:37:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115324979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:15,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:15,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:15,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501547403] [2021-12-16 01:37:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:15,790 INFO L87 Difference]: Start difference. First operand 22861 states and 36253 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:17,105 INFO L93 Difference]: Finished difference Result 43692 states and 68963 transitions. [2021-12-16 01:37:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:37:17,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-16 01:37:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:17,187 INFO L225 Difference]: With dead ends: 43692 [2021-12-16 01:37:17,187 INFO L226 Difference]: Without dead ends: 43690 [2021-12-16 01:37:17,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:37:17,201 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 268 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:17,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1026 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43690 states. [2021-12-16 01:37:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43690 to 23585. [2021-12-16 01:37:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23585 states, 23584 states have (on average 1.567503392130258) internal successors, (36968), 23584 states have internal predecessors, (36968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23585 states to 23585 states and 36968 transitions. [2021-12-16 01:37:18,306 INFO L78 Accepts]: Start accepts. Automaton has 23585 states and 36968 transitions. Word has length 71 [2021-12-16 01:37:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:18,307 INFO L470 AbstractCegarLoop]: Abstraction has 23585 states and 36968 transitions. [2021-12-16 01:37:18,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23585 states and 36968 transitions. [2021-12-16 01:37:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 01:37:18,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:18,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:18,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:37:18,309 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1977084468, now seen corresponding path program 1 times [2021-12-16 01:37:18,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:18,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306968317] [2021-12-16 01:37:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:18,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:37:18,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306968317] [2021-12-16 01:37:18,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306968317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:18,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:18,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:18,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861600631] [2021-12-16 01:37:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:18,356 INFO L87 Difference]: Start difference. First operand 23585 states and 36968 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:20,159 INFO L93 Difference]: Finished difference Result 57661 states and 90684 transitions. [2021-12-16 01:37:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:37:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 95 [2021-12-16 01:37:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:20,240 INFO L225 Difference]: With dead ends: 57661 [2021-12-16 01:37:20,240 INFO L226 Difference]: Without dead ends: 46299 [2021-12-16 01:37:20,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:37:20,262 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 553 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:20,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 1002 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46299 states. [2021-12-16 01:37:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46299 to 36193. [2021-12-16 01:37:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36193 states, 36192 states have (on average 1.5653183023872679) internal successors, (56652), 36192 states have internal predecessors, (56652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36193 states to 36193 states and 56652 transitions. [2021-12-16 01:37:21,891 INFO L78 Accepts]: Start accepts. Automaton has 36193 states and 56652 transitions. Word has length 95 [2021-12-16 01:37:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:21,891 INFO L470 AbstractCegarLoop]: Abstraction has 36193 states and 56652 transitions. [2021-12-16 01:37:21,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36193 states and 56652 transitions. [2021-12-16 01:37:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 01:37:21,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:21,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:21,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:37:21,894 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:21,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1290194386, now seen corresponding path program 1 times [2021-12-16 01:37:21,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:21,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990121829] [2021-12-16 01:37:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:21,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:37:21,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:21,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990121829] [2021-12-16 01:37:21,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990121829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:21,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:21,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:21,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236279728] [2021-12-16 01:37:21,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:21,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:21,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:21,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:21,955 INFO L87 Difference]: Start difference. First operand 36193 states and 56652 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:24,105 INFO L93 Difference]: Finished difference Result 64663 states and 101696 transitions. [2021-12-16 01:37:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:37:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-16 01:37:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:24,206 INFO L225 Difference]: With dead ends: 64663 [2021-12-16 01:37:24,206 INFO L226 Difference]: Without dead ends: 53531 [2021-12-16 01:37:24,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:37:24,225 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 552 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 977 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53531 states. [2021-12-16 01:37:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53531 to 49013. [2021-12-16 01:37:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49013 states, 49012 states have (on average 1.5667183546886476) internal successors, (76788), 49012 states have internal predecessors, (76788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49013 states to 49013 states and 76788 transitions. [2021-12-16 01:37:26,262 INFO L78 Accepts]: Start accepts. Automaton has 49013 states and 76788 transitions. Word has length 95 [2021-12-16 01:37:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:26,262 INFO L470 AbstractCegarLoop]: Abstraction has 49013 states and 76788 transitions. [2021-12-16 01:37:26,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 49013 states and 76788 transitions. [2021-12-16 01:37:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 01:37:26,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:26,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:26,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:37:26,265 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 349220336, now seen corresponding path program 1 times [2021-12-16 01:37:26,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320388166] [2021-12-16 01:37:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:26,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 01:37:26,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:26,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320388166] [2021-12-16 01:37:26,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320388166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:26,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:26,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:37:26,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270218650] [2021-12-16 01:37:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:26,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:37:26,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:37:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:37:26,315 INFO L87 Difference]: Start difference. First operand 49013 states and 76788 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:28,763 INFO L93 Difference]: Finished difference Result 69083 states and 108644 transitions. [2021-12-16 01:37:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:37:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 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 95 [2021-12-16 01:37:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:28,879 INFO L225 Difference]: With dead ends: 69083 [2021-12-16 01:37:28,879 INFO L226 Difference]: Without dead ends: 57951 [2021-12-16 01:37:28,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:37:28,899 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 557 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:28,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 1007 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57951 states. [2021-12-16 01:37:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57951 to 56153. [2021-12-16 01:37:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56153 states, 56152 states have (on average 1.5683145747257443) internal successors, (88064), 56152 states have internal predecessors, (88064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56153 states to 56153 states and 88064 transitions. [2021-12-16 01:37:31,344 INFO L78 Accepts]: Start accepts. Automaton has 56153 states and 88064 transitions. Word has length 95 [2021-12-16 01:37:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:31,344 INFO L470 AbstractCegarLoop]: Abstraction has 56153 states and 88064 transitions. [2021-12-16 01:37:31,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 56153 states and 88064 transitions. [2021-12-16 01:37:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 01:37:31,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:31,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:31,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:37:31,347 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1097572160, now seen corresponding path program 1 times [2021-12-16 01:37:31,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:31,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429901243] [2021-12-16 01:37:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:31,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:37:31,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429901243] [2021-12-16 01:37:31,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429901243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:31,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:31,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:37:31,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544644015] [2021-12-16 01:37:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:37:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:37:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:37:31,387 INFO L87 Difference]: Start difference. First operand 56153 states and 88064 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:34,208 INFO L93 Difference]: Finished difference Result 91416 states and 144033 transitions. [2021-12-16 01:37:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:37:34,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-16 01:37:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:34,368 INFO L225 Difference]: With dead ends: 91416 [2021-12-16 01:37:34,369 INFO L226 Difference]: Without dead ends: 72822 [2021-12-16 01:37:34,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:37:34,402 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 242 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:34,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 751 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72822 states. [2021-12-16 01:37:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72822 to 71026. [2021-12-16 01:37:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71026 states, 71025 states have (on average 1.5684899683210136) internal successors, (111402), 71025 states have internal predecessors, (111402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71026 states to 71026 states and 111402 transitions. [2021-12-16 01:37:37,835 INFO L78 Accepts]: Start accepts. Automaton has 71026 states and 111402 transitions. Word has length 96 [2021-12-16 01:37:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:37,836 INFO L470 AbstractCegarLoop]: Abstraction has 71026 states and 111402 transitions. [2021-12-16 01:37:37,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 71026 states and 111402 transitions. [2021-12-16 01:37:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-16 01:37:37,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:37,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:37:37,839 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 748884206, now seen corresponding path program 1 times [2021-12-16 01:37:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:37,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367071046] [2021-12-16 01:37:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:37,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 01:37:37,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367071046] [2021-12-16 01:37:37,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367071046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:37,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:37,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:37,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019406393] [2021-12-16 01:37:37,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:37,903 INFO L87 Difference]: Start difference. First operand 71026 states and 111402 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:37:42,097 INFO L93 Difference]: Finished difference Result 153118 states and 240882 transitions. [2021-12-16 01:37:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:37:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-16 01:37:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:37:42,428 INFO L225 Difference]: With dead ends: 153118 [2021-12-16 01:37:42,428 INFO L226 Difference]: Without dead ends: 119820 [2021-12-16 01:37:42,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:42,529 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 110 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:37:42,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 398 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:37:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119820 states. [2021-12-16 01:37:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119820 to 119542. [2021-12-16 01:37:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119542 states, 119541 states have (on average 1.5682736466986222) internal successors, (187473), 119541 states have internal predecessors, (187473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119542 states to 119542 states and 187473 transitions. [2021-12-16 01:37:48,457 INFO L78 Accepts]: Start accepts. Automaton has 119542 states and 187473 transitions. Word has length 96 [2021-12-16 01:37:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:37:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 119542 states and 187473 transitions. [2021-12-16 01:37:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:37:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 119542 states and 187473 transitions. [2021-12-16 01:37:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 01:37:48,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:37:48,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:37:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:37:48,476 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:37:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:37:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 894607584, now seen corresponding path program 1 times [2021-12-16 01:37:48,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:37:48,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92168700] [2021-12-16 01:37:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:37:48,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:37:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:37:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:37:48,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:37:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92168700] [2021-12-16 01:37:48,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92168700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:37:48,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:37:48,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:37:48,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419747851] [2021-12-16 01:37:48,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:37:48,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:37:48,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:37:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:37:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:37:48,509 INFO L87 Difference]: Start difference. First operand 119542 states and 187473 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)