./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label57.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/eca-rers2012/Problem17_label57.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 0e82c46cc7c6a1ae6528ac072c5cfd2ae759a81ebaffa85f079f32af9f51d4a1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:03:00,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:03:00,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:03:00,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:03:00,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:03:00,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:03:00,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:03:00,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:03:00,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:03:00,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:03:00,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:03:00,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:03:00,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:03:00,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:03:00,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:03:00,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:03:00,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:03:00,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:03:00,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:03:00,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:03:00,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:03:00,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:03:00,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:03:00,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:03:00,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:03:00,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:03:00,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:03:00,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:03:00,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:03:00,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:03:00,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:03:00,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:03:00,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:03:00,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:03:00,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:03:00,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:03:00,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:03:00,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:03:00,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:03:00,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:03:00,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:03:00,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:03:00,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:03:00,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:03:00,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:03:00,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:03:00,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:03:00,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:03:00,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:03:00,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:03:00,732 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:03:00,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:03:00,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:03:00,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:03:00,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:03:00,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:03:00,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:03:00,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:03:00,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:03:00,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:03:00,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:03:00,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:03:00,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:03:00,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:03:00,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:03:00,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:03:00,737 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:03:00,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:03:00,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:03:00,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:03:00,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e82c46cc7c6a1ae6528ac072c5cfd2ae759a81ebaffa85f079f32af9f51d4a1 [2021-12-15 23:03:00,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:03:00,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:03:00,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:03:00,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:03:00,919 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:03:00,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label57.c [2021-12-15 23:03:00,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ebff506/b62e9f975f1e4acf8c938d2d6e342b09/FLAG1635bfb58 [2021-12-15 23:03:01,428 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:03:01,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label57.c [2021-12-15 23:03:01,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ebff506/b62e9f975f1e4acf8c938d2d6e342b09/FLAG1635bfb58 [2021-12-15 23:03:01,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ebff506/b62e9f975f1e4acf8c938d2d6e342b09 [2021-12-15 23:03:01,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:03:01,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:03:01,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:03:01,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:03:01,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:03:01,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:01" (1/1) ... [2021-12-15 23:03:01,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d224e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:01, skipping insertion in model container [2021-12-15 23:03:01,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:01" (1/1) ... [2021-12-15 23:03:01,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:03:01,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:03:01,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label57.c[2672,2685] [2021-12-15 23:03:02,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:02,385 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:03:02,401 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/eca-rers2012/Problem17_label57.c[2672,2685] [2021-12-15 23:03:02,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:03:02,579 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:03:02,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02 WrapperNode [2021-12-15 23:03:02,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:03:02,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:02,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:03:02,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:03:02,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:02,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:02,913 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:03:02,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:03:02,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:03:02,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:03:02,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:03:02,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:02,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:02,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:02,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:03,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:03,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:03,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:03,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:03:03,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:03:03,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:03:03,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:03:03,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (1/1) ... [2021-12-15 23:03:03,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:03:03,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:03,244 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) [2021-12-15 23:03:03,279 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 [2021-12-15 23:03:03,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:03:03,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:03:03,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:03:03,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:03:03,363 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:03:03,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:03:05,640 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:03:05,654 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:03:05,654 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:03:05,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:05 BoogieIcfgContainer [2021-12-15 23:03:05,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:03:05,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:03:05,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:03:05,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:03:05,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:03:01" (1/3) ... [2021-12-15 23:03:05,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5828f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:05, skipping insertion in model container [2021-12-15 23:03:05,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:02" (2/3) ... [2021-12-15 23:03:05,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e5828f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:05, skipping insertion in model container [2021-12-15 23:03:05,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:05" (3/3) ... [2021-12-15 23:03:05,664 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label57.c [2021-12-15 23:03:05,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:03:05,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:03:05,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:03:05,723 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 [2021-12-15 23:03:05,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:03:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 23:03:05,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:05,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:05,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2021-12-15 23:03:05,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:05,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135665174] [2021-12-15 23:03:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:05,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:05,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135665174] [2021-12-15 23:03:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135665174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:05,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:05,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:05,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724579635] [2021-12-15 23:03:05,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:05,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:05,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:05,908 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:08,282 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-15 23:03:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-15 23:03:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:08,306 INFO L225 Difference]: With dead ends: 1667 [2021-12-15 23:03:08,306 INFO L226 Difference]: Without dead ends: 998 [2021-12-15 23:03:08,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:08,315 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 528 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:03:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-15 23:03:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-15 23:03:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-15 23:03:08,387 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 17 [2021-12-15 23:03:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:08,387 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-15 23:03:08,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-15 23:03:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 23:03:08,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:08,390 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:03:08,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:03:08,390 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1420614467, now seen corresponding path program 1 times [2021-12-15 23:03:08,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:08,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595933021] [2021-12-15 23:03:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:08,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:08,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595933021] [2021-12-15 23:03:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595933021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:08,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:08,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:08,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438519057] [2021-12-15 23:03:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:08,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:08,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:08,475 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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) [2021-12-15 23:03:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:10,285 INFO L93 Difference]: Finished difference Result 2843 states and 4882 transitions. [2021-12-15 23:03:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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 82 [2021-12-15 23:03:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:10,292 INFO L225 Difference]: With dead ends: 2843 [2021-12-15 23:03:10,292 INFO L226 Difference]: Without dead ends: 1863 [2021-12-15 23:03:10,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:10,295 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 409 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:10,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 495 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 23:03:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-15 23:03:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1857. [2021-12-15 23:03:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4552801724137931) internal successors, (2701), 1856 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2701 transitions. [2021-12-15 23:03:10,330 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2701 transitions. Word has length 82 [2021-12-15 23:03:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:10,331 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2701 transitions. [2021-12-15 23:03:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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) [2021-12-15 23:03:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2701 transitions. [2021-12-15 23:03:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 23:03:10,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:10,333 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:03:10,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:03:10,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1820580012, now seen corresponding path program 1 times [2021-12-15 23:03:10,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918906797] [2021-12-15 23:03:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:10,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:10,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918906797] [2021-12-15 23:03:10,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918906797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:10,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:03:10,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111505585] [2021-12-15 23:03:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:10,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:10,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:10,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:10,451 INFO L87 Difference]: Start difference. First operand 1857 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 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) [2021-12-15 23:03:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:12,039 INFO L93 Difference]: Finished difference Result 5425 states and 7895 transitions. [2021-12-15 23:03:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 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 88 [2021-12-15 23:03:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:12,049 INFO L225 Difference]: With dead ends: 5425 [2021-12-15 23:03:12,049 INFO L226 Difference]: Without dead ends: 3570 [2021-12-15 23:03:12,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:12,057 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:12,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-15 23:03:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2714. [2021-12-15 23:03:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.315886472539624) internal successors, (3570), 2713 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3570 transitions. [2021-12-15 23:03:12,096 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3570 transitions. Word has length 88 [2021-12-15 23:03:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:12,097 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3570 transitions. [2021-12-15 23:03:12,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 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) [2021-12-15 23:03:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3570 transitions. [2021-12-15 23:03:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-15 23:03:12,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:12,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:12,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:03:12,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -872972308, now seen corresponding path program 1 times [2021-12-15 23:03:12,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:12,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264089516] [2021-12-15 23:03:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:12,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:12,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264089516] [2021-12-15 23:03:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264089516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:12,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 23:03:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683349949] [2021-12-15 23:03:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:03:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:03:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:03:12,266 INFO L87 Difference]: Start difference. First operand 2714 states and 3570 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:14,413 INFO L93 Difference]: Finished difference Result 7164 states and 9658 transitions. [2021-12-15 23:03:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:03:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-12-15 23:03:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:14,426 INFO L225 Difference]: With dead ends: 7164 [2021-12-15 23:03:14,426 INFO L226 Difference]: Without dead ends: 4452 [2021-12-15 23:03:14,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:14,429 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1684 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:14,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 858 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:03:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-12-15 23:03:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 4424. [2021-12-15 23:03:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.2912050644359032) internal successors, (5711), 4423 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5711 transitions. [2021-12-15 23:03:14,480 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5711 transitions. Word has length 165 [2021-12-15 23:03:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:14,481 INFO L470 AbstractCegarLoop]: Abstraction has 4424 states and 5711 transitions. [2021-12-15 23:03:14,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5711 transitions. [2021-12-15 23:03:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-15 23:03:14,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:14,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:03:14,483 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 259839131, now seen corresponding path program 1 times [2021-12-15 23:03:14,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:14,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688982192] [2021-12-15 23:03:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:14,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:14,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688982192] [2021-12-15 23:03:14,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688982192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9683707] [2021-12-15 23:03:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:14,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:14,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:14,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:03:14,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:03:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:03:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:15,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:15,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9683707] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:15,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:03:15,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 23:03:15,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423832901] [2021-12-15 23:03:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:15,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:15,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:15,627 INFO L87 Difference]: Start difference. First operand 4424 states and 5711 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:18,770 INFO L93 Difference]: Finished difference Result 13992 states and 18566 transitions. [2021-12-15 23:03:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-15 23:03:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:18,794 INFO L225 Difference]: With dead ends: 13992 [2021-12-15 23:03:18,794 INFO L226 Difference]: Without dead ends: 8693 [2021-12-15 23:03:18,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:18,799 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1123 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1397 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:18,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 152 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 23:03:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states. [2021-12-15 23:03:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8693 to 8688. [2021-12-15 23:03:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8688 states, 8687 states have (on average 1.2229768619776678) internal successors, (10624), 8687 states have internal predecessors, (10624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 10624 transitions. [2021-12-15 23:03:18,900 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 10624 transitions. Word has length 171 [2021-12-15 23:03:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:18,900 INFO L470 AbstractCegarLoop]: Abstraction has 8688 states and 10624 transitions. [2021-12-15 23:03:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 10624 transitions. [2021-12-15 23:03:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-12-15 23:03:18,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:18,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:18,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:19,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:19,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -931351970, now seen corresponding path program 1 times [2021-12-15 23:03:19,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813731125] [2021-12-15 23:03:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:19,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 44 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:03:19,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:19,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813731125] [2021-12-15 23:03:19,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813731125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:19,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10068973] [2021-12-15 23:03:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:19,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:19,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:03:19,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:03:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:03:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 170 proven. 73 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 23:03:19,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:03:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 23:03:20,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10068973] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:20,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:03:20,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2021-12-15 23:03:20,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224369631] [2021-12-15 23:03:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:20,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:20,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:03:20,312 INFO L87 Difference]: Start difference. First operand 8688 states and 10624 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:22,861 INFO L93 Difference]: Finished difference Result 24222 states and 29723 transitions. [2021-12-15 23:03:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 245 [2021-12-15 23:03:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:22,897 INFO L225 Difference]: With dead ends: 24222 [2021-12-15 23:03:22,897 INFO L226 Difference]: Without dead ends: 15536 [2021-12-15 23:03:22,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 485 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 23:03:22,910 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 838 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:22,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 194 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:03:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-12-15 23:03:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 15530. [2021-12-15 23:03:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15530 states, 15529 states have (on average 1.2101229956854918) internal successors, (18792), 15529 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15530 states to 15530 states and 18792 transitions. [2021-12-15 23:03:23,110 INFO L78 Accepts]: Start accepts. Automaton has 15530 states and 18792 transitions. Word has length 245 [2021-12-15 23:03:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 15530 states and 18792 transitions. [2021-12-15 23:03:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15530 states and 18792 transitions. [2021-12-15 23:03:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 23:03:23,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:23,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-15 23:03:23,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:23,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 23:03:23,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1067126678, now seen corresponding path program 1 times [2021-12-15 23:03:23,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645381182] [2021-12-15 23:03:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:23,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-15 23:03:23,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645381182] [2021-12-15 23:03:23,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645381182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:23,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:23,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:23,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030281621] [2021-12-15 23:03:23,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:23,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:23,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:23,453 INFO L87 Difference]: Start difference. First operand 15530 states and 18792 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:24,892 INFO L93 Difference]: Finished difference Result 40443 states and 49307 transitions. [2021-12-15 23:03:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 348 [2021-12-15 23:03:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:24,929 INFO L225 Difference]: With dead ends: 40443 [2021-12-15 23:03:24,929 INFO L226 Difference]: Without dead ends: 24913 [2021-12-15 23:03:24,941 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 [2021-12-15 23:03:24,942 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 434 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:24,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 351 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:03:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24913 states. [2021-12-15 23:03:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24913 to 22343. [2021-12-15 23:03:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22343 states, 22342 states have (on average 1.1988183689911378) internal successors, (26784), 22342 states have internal predecessors, (26784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22343 states to 22343 states and 26784 transitions. [2021-12-15 23:03:25,192 INFO L78 Accepts]: Start accepts. Automaton has 22343 states and 26784 transitions. Word has length 348 [2021-12-15 23:03:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:25,193 INFO L470 AbstractCegarLoop]: Abstraction has 22343 states and 26784 transitions. [2021-12-15 23:03:25,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 22343 states and 26784 transitions. [2021-12-15 23:03:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-15 23:03:25,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:25,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-15 23:03:25,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:03:25,198 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash -359571855, now seen corresponding path program 1 times [2021-12-15 23:03:25,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498937542] [2021-12-15 23:03:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:25,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 403 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-15 23:03:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498937542] [2021-12-15 23:03:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498937542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:25,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:25,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:25,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161960298] [2021-12-15 23:03:25,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:25,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:25,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:25,314 INFO L87 Difference]: Start difference. First operand 22343 states and 26784 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:27,059 INFO L93 Difference]: Finished difference Result 53677 states and 64570 transitions. [2021-12-15 23:03:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 350 [2021-12-15 23:03:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:27,109 INFO L225 Difference]: With dead ends: 53677 [2021-12-15 23:03:27,110 INFO L226 Difference]: Without dead ends: 31336 [2021-12-15 23:03:27,132 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 [2021-12-15 23:03:27,132 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 428 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:27,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 731 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:03:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31336 states. [2021-12-15 23:03:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31336 to 30027. [2021-12-15 23:03:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30027 states, 30026 states have (on average 1.2049224005861587) internal successors, (36179), 30026 states have internal predecessors, (36179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30027 states to 30027 states and 36179 transitions. [2021-12-15 23:03:27,620 INFO L78 Accepts]: Start accepts. Automaton has 30027 states and 36179 transitions. Word has length 350 [2021-12-15 23:03:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:27,620 INFO L470 AbstractCegarLoop]: Abstraction has 30027 states and 36179 transitions. [2021-12-15 23:03:27,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 30027 states and 36179 transitions. [2021-12-15 23:03:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-15 23:03:27,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:27,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:27,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:03:27,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:27,626 INFO L85 PathProgramCache]: Analyzing trace with hash -60944868, now seen corresponding path program 1 times [2021-12-15 23:03:27,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839818988] [2021-12-15 23:03:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:27,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-15 23:03:27,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:27,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839818988] [2021-12-15 23:03:27,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839818988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:27,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:27,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:27,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660755706] [2021-12-15 23:03:27,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:27,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:27,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:27,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:27,731 INFO L87 Difference]: Start difference. First operand 30027 states and 36179 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:29,637 INFO L93 Difference]: Finished difference Result 80910 states and 96296 transitions. [2021-12-15 23:03:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 351 [2021-12-15 23:03:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:29,716 INFO L225 Difference]: With dead ends: 80910 [2021-12-15 23:03:29,717 INFO L226 Difference]: Without dead ends: 49601 [2021-12-15 23:03:29,737 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 [2021-12-15 23:03:29,739 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 446 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 625 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49601 states. [2021-12-15 23:03:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49601 to 46191. [2021-12-15 23:03:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46191 states, 46190 states have (on average 1.166161506819658) internal successors, (53865), 46190 states have internal predecessors, (53865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46191 states to 46191 states and 53865 transitions. [2021-12-15 23:03:30,282 INFO L78 Accepts]: Start accepts. Automaton has 46191 states and 53865 transitions. Word has length 351 [2021-12-15 23:03:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:30,282 INFO L470 AbstractCegarLoop]: Abstraction has 46191 states and 53865 transitions. [2021-12-15 23:03:30,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46191 states and 53865 transitions. [2021-12-15 23:03:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-15 23:03:30,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:30,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:03:30,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:03:30,288 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash 493747939, now seen corresponding path program 1 times [2021-12-15 23:03:30,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665186224] [2021-12-15 23:03:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:30,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 23:03:30,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:30,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665186224] [2021-12-15 23:03:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665186224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:30,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:30,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:03:30,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017194062] [2021-12-15 23:03:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:30,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:30,399 INFO L87 Difference]: Start difference. First operand 46191 states and 53865 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:33,307 INFO L93 Difference]: Finished difference Result 124790 states and 145084 transitions. [2021-12-15 23:03:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 355 [2021-12-15 23:03:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:33,507 INFO L225 Difference]: With dead ends: 124790 [2021-12-15 23:03:33,507 INFO L226 Difference]: Without dead ends: 78601 [2021-12-15 23:03:33,530 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 [2021-12-15 23:03:33,537 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 827 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:33,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 188 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 23:03:33,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78601 states. [2021-12-15 23:03:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78601 to 75618. [2021-12-15 23:03:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75618 states, 75617 states have (on average 1.1590383114908023) internal successors, (87643), 75617 states have internal predecessors, (87643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75618 states to 75618 states and 87643 transitions. [2021-12-15 23:03:34,257 INFO L78 Accepts]: Start accepts. Automaton has 75618 states and 87643 transitions. Word has length 355 [2021-12-15 23:03:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:34,257 INFO L470 AbstractCegarLoop]: Abstraction has 75618 states and 87643 transitions. [2021-12-15 23:03:34,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 75618 states and 87643 transitions. [2021-12-15 23:03:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-15 23:03:34,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:34,262 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:34,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:03:34,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash -220930497, now seen corresponding path program 1 times [2021-12-15 23:03:34,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540265302] [2021-12-15 23:03:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:34,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 317 proven. 82 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-15 23:03:34,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540265302] [2021-12-15 23:03:34,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540265302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:03:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24404359] [2021-12-15 23:03:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:34,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:34,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:03:34,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:03:34,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:03:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:03:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:03:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-15 23:03:36,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:03:36,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24404359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:36,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:03:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 23:03:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745838056] [2021-12-15 23:03:36,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:36,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:36,639 INFO L87 Difference]: Start difference. First operand 75618 states and 87643 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:36,784 INFO L93 Difference]: Finished difference Result 75635 states and 87660 transitions. [2021-12-15 23:03:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 370 [2021-12-15 23:03:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:36,865 INFO L225 Difference]: With dead ends: 75635 [2021-12-15 23:03:36,865 INFO L226 Difference]: Without dead ends: 75633 [2021-12-15 23:03:36,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:03:36,887 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:36,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 839 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 713 Unchecked, 0.0s Time] [2021-12-15 23:03:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75633 states. [2021-12-15 23:03:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75633 to 75633. [2021-12-15 23:03:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75633 states, 75632 states have (on average 1.1590067696213242) internal successors, (87658), 75632 states have internal predecessors, (87658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75633 states to 75633 states and 87658 transitions. [2021-12-15 23:03:37,729 INFO L78 Accepts]: Start accepts. Automaton has 75633 states and 87658 transitions. Word has length 370 [2021-12-15 23:03:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:37,730 INFO L470 AbstractCegarLoop]: Abstraction has 75633 states and 87658 transitions. [2021-12-15 23:03:37,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 75633 states and 87658 transitions. [2021-12-15 23:03:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-15 23:03:37,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:37,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:37,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:03:37,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:03:37,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash -94402040, now seen corresponding path program 1 times [2021-12-15 23:03:37,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:37,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478105453] [2021-12-15 23:03:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:37,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-15 23:03:38,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478105453] [2021-12-15 23:03:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478105453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:38,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:38,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242099165] [2021-12-15 23:03:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:38,052 INFO L87 Difference]: Start difference. First operand 75633 states and 87658 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:39,996 INFO L93 Difference]: Finished difference Result 161088 states and 186575 transitions. [2021-12-15 23:03:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 377 [2021-12-15 23:03:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:40,085 INFO L225 Difference]: With dead ends: 161088 [2021-12-15 23:03:40,085 INFO L226 Difference]: Without dead ends: 85032 [2021-12-15 23:03:40,122 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 [2021-12-15 23:03:40,122 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 450 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:40,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 854 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85032 states. [2021-12-15 23:03:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85032 to 85023. [2021-12-15 23:03:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85023 states, 85022 states have (on average 1.1486791653924866) internal successors, (97663), 85022 states have internal predecessors, (97663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85023 states to 85023 states and 97663 transitions. [2021-12-15 23:03:41,014 INFO L78 Accepts]: Start accepts. Automaton has 85023 states and 97663 transitions. Word has length 377 [2021-12-15 23:03:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:41,015 INFO L470 AbstractCegarLoop]: Abstraction has 85023 states and 97663 transitions. [2021-12-15 23:03:41,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 85023 states and 97663 transitions. [2021-12-15 23:03:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-15 23:03:41,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:41,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 23:03:41,022 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1256554059, now seen corresponding path program 1 times [2021-12-15 23:03:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673054469] [2021-12-15 23:03:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:41,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-15 23:03:41,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673054469] [2021-12-15 23:03:41,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673054469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:41,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:41,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:41,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083075484] [2021-12-15 23:03:41,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:41,337 INFO L87 Difference]: Start difference. First operand 85023 states and 97663 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:43,104 INFO L93 Difference]: Finished difference Result 184500 states and 211542 transitions. [2021-12-15 23:03:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 414 [2021-12-15 23:03:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:43,218 INFO L225 Difference]: With dead ends: 184500 [2021-12-15 23:03:43,219 INFO L226 Difference]: Without dead ends: 99032 [2021-12-15 23:03:43,259 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 [2021-12-15 23:03:43,261 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 502 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:43,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 682 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 23:03:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99032 states. [2021-12-15 23:03:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99032 to 99024. [2021-12-15 23:03:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99024 states, 99023 states have (on average 1.1178413095947406) internal successors, (110692), 99023 states have internal predecessors, (110692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99024 states to 99024 states and 110692 transitions. [2021-12-15 23:03:44,640 INFO L78 Accepts]: Start accepts. Automaton has 99024 states and 110692 transitions. Word has length 414 [2021-12-15 23:03:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:44,640 INFO L470 AbstractCegarLoop]: Abstraction has 99024 states and 110692 transitions. [2021-12-15 23:03:44,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99024 states and 110692 transitions. [2021-12-15 23:03:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-15 23:03:44,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:44,654 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:44,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:03:44,654 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1285746988, now seen corresponding path program 1 times [2021-12-15 23:03:44,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:44,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379695546] [2021-12-15 23:03:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:44,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 23:03:44,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379695546] [2021-12-15 23:03:44,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379695546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:44,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:44,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:03:44,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780971718] [2021-12-15 23:03:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:44,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:44,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:44,800 INFO L87 Difference]: Start difference. First operand 99024 states and 110692 transitions. Second operand has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:48,188 INFO L93 Difference]: Finished difference Result 225756 states and 251597 transitions. [2021-12-15 23:03:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 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 505 [2021-12-15 23:03:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:48,362 INFO L225 Difference]: With dead ends: 225756 [2021-12-15 23:03:48,362 INFO L226 Difference]: Without dead ends: 125459 [2021-12-15 23:03:48,405 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 [2021-12-15 23:03:48,406 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 772 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:48,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 251 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 23:03:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125459 states. [2021-12-15 23:03:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125459 to 120774. [2021-12-15 23:03:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120774 states, 120773 states have (on average 1.1128397903504923) internal successors, (134401), 120773 states have internal predecessors, (134401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120774 states to 120774 states and 134401 transitions. [2021-12-15 23:03:49,924 INFO L78 Accepts]: Start accepts. Automaton has 120774 states and 134401 transitions. Word has length 505 [2021-12-15 23:03:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:49,925 INFO L470 AbstractCegarLoop]: Abstraction has 120774 states and 134401 transitions. [2021-12-15 23:03:49,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 120774 states and 134401 transitions. [2021-12-15 23:03:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-15 23:03:49,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:49,939 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:49,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:03:49,940 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 912340516, now seen corresponding path program 1 times [2021-12-15 23:03:49,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670959348] [2021-12-15 23:03:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:49,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 509 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-15 23:03:50,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:50,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670959348] [2021-12-15 23:03:50,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670959348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:50,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:50,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:03:50,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058786265] [2021-12-15 23:03:50,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:50,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:03:50,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:03:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:03:50,060 INFO L87 Difference]: Start difference. First operand 120774 states and 134401 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:52,155 INFO L93 Difference]: Finished difference Result 254316 states and 283042 transitions. [2021-12-15 23:03:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:03:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 509 [2021-12-15 23:03:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:52,315 INFO L225 Difference]: With dead ends: 254316 [2021-12-15 23:03:52,315 INFO L226 Difference]: Without dead ends: 133544 [2021-12-15 23:03:52,660 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 [2021-12-15 23:03:52,675 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 381 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:52,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 307 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:03:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133544 states. [2021-12-15 23:03:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133544 to 130560. [2021-12-15 23:03:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130560 states, 130559 states have (on average 1.1115281213857338) internal successors, (145120), 130559 states have internal predecessors, (145120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130560 states to 130560 states and 145120 transitions. [2021-12-15 23:03:54,290 INFO L78 Accepts]: Start accepts. Automaton has 130560 states and 145120 transitions. Word has length 509 [2021-12-15 23:03:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:54,291 INFO L470 AbstractCegarLoop]: Abstraction has 130560 states and 145120 transitions. [2021-12-15 23:03:54,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 130560 states and 145120 transitions. [2021-12-15 23:03:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-12-15 23:03:54,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:54,305 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:54,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 23:03:54,322 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:54,323 INFO L85 PathProgramCache]: Analyzing trace with hash 896412374, now seen corresponding path program 1 times [2021-12-15 23:03:54,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:54,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682339648] [2021-12-15 23:03:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:54,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:03:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-12-15 23:03:54,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:03:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682339648] [2021-12-15 23:03:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682339648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:03:54,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:03:54,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:03:54,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090027411] [2021-12-15 23:03:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:03:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:03:54,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:03:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:03:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:03:54,641 INFO L87 Difference]: Start difference. First operand 130560 states and 145120 transitions. Second operand has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:03:57,771 INFO L93 Difference]: Finished difference Result 282854 states and 313787 transitions. [2021-12-15 23:03:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:03:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 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 510 [2021-12-15 23:03:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:03:57,946 INFO L225 Difference]: With dead ends: 282854 [2021-12-15 23:03:57,947 INFO L226 Difference]: Without dead ends: 151021 [2021-12-15 23:03:58,015 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 [2021-12-15 23:03:58,016 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 772 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:03:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 247 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:03:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151021 states. [2021-12-15 23:03:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151021 to 130560. [2021-12-15 23:03:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130560 states, 130559 states have (on average 1.1115281213857338) internal successors, (145120), 130559 states have internal predecessors, (145120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130560 states to 130560 states and 145120 transitions. [2021-12-15 23:03:59,903 INFO L78 Accepts]: Start accepts. Automaton has 130560 states and 145120 transitions. Word has length 510 [2021-12-15 23:03:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:03:59,904 INFO L470 AbstractCegarLoop]: Abstraction has 130560 states and 145120 transitions. [2021-12-15 23:03:59,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:03:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 130560 states and 145120 transitions. [2021-12-15 23:03:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-12-15 23:03:59,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:03:59,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:03:59,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:03:59,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:03:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:03:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1610286098, now seen corresponding path program 1 times [2021-12-15 23:03:59,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:03:59,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110708369] [2021-12-15 23:03:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:03:59,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:03:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:04:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 23:04:00,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:04:00,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110708369] [2021-12-15 23:04:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110708369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:04:00,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:04:00,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:04:00,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252903372] [2021-12-15 23:04:00,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:04:00,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:04:00,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:04:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:04:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:04:00,062 INFO L87 Difference]: Start difference. First operand 130560 states and 145120 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:04:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:04:02,236 INFO L93 Difference]: Finished difference Result 283764 states and 314982 transitions. [2021-12-15 23:04:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:04:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 541 [2021-12-15 23:04:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:04:02,425 INFO L225 Difference]: With dead ends: 283764 [2021-12-15 23:04:02,425 INFO L226 Difference]: Without dead ends: 153206 [2021-12-15 23:04:02,508 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 [2021-12-15 23:04:02,509 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 300 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:04:02,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 766 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 23:04:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153206 states. [2021-12-15 23:04:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153206 to 142101.