./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem16_label03.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 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:53:20,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:53:20,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:53:20,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:53:20,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:53:20,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:53:20,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:53:20,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:53:20,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:53:20,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:53:20,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:53:20,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:53:20,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:53:20,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:53:20,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:53:20,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:53:20,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:53:20,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:53:20,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:53:20,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:53:20,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:53:20,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:53:20,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:53:20,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:53:20,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:53:20,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:53:20,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:53:20,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:53:20,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:53:20,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:53:20,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:53:20,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:53:20,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:53:20,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:53:20,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:53:20,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:53:20,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:53:20,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:53:20,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:53:20,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:53:20,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:53:20,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:53:20,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:53:20,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:53:20,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:53:20,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:53:20,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:53:20,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:53:20,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:53:20,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:53:20,727 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:53:20,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:53:20,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:53:20,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:53:20,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:53:20,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:53:20,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:53:20,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:53:20,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:53:20,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:53:20,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:53:20,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:53:20,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:53:20,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:53:20,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:53:20,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:53:20,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:53:20,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:53:20,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:53:20,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:53:20,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:53:20,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 [2021-12-15 09:53:20,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:53:20,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:53:20,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:53:20,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:53:20,972 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:53:20,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-12-15 09:53:21,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78962db84/927029c812bd4b188089615ae79dd2c0/FLAG059308ffe [2021-12-15 09:53:21,470 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:53:21,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-12-15 09:53:21,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78962db84/927029c812bd4b188089615ae79dd2c0/FLAG059308ffe [2021-12-15 09:53:21,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78962db84/927029c812bd4b188089615ae79dd2c0 [2021-12-15 09:53:21,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:53:21,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:53:21,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:53:21,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:53:21,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:53:21,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:53:21" (1/1) ... [2021-12-15 09:53:21,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae062d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:21, skipping insertion in model container [2021-12-15 09:53:21,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:53:21" (1/1) ... [2021-12-15 09:53:21,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:53:21,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:53:22,056 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/Problem16_label03.c[1025,1038] [2021-12-15 09:53:22,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:53:22,326 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:53:22,336 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/Problem16_label03.c[1025,1038] [2021-12-15 09:53:22,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:53:22,507 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:53:22,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22 WrapperNode [2021-12-15 09:53:22,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:53:22,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:53:22,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:53:22,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:53:22,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,647 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 09:53:22,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:53:22,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:53:22,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:53:22,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:53:22,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:53:22,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:53:22,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:53:22,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:53:22,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (1/1) ... [2021-12-15 09:53:22,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:53:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:22,796 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 09:53:22,813 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 09:53:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:53:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:53:22,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:53:22,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:53:22,875 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:53:22,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:53:24,269 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:53:24,284 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:53:24,299 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:53:24,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:53:24 BoogieIcfgContainer [2021-12-15 09:53:24,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:53:24,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:53:24,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:53:24,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:53:24,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:53:21" (1/3) ... [2021-12-15 09:53:24,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b5f557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:53:24, skipping insertion in model container [2021-12-15 09:53:24,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:53:22" (2/3) ... [2021-12-15 09:53:24,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b5f557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:53:24, skipping insertion in model container [2021-12-15 09:53:24,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:53:24" (3/3) ... [2021-12-15 09:53:24,319 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label03.c [2021-12-15 09:53:24,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:53:24,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:53:24,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:53:24,396 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 09:53:24,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:53:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 09:53:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 09:53:24,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:24,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 09:53:24,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-12-15 09:53:24,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125234395] [2021-12-15 09:53:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:24,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:24,545 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 09:53:24,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125234395] [2021-12-15 09:53:24,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125234395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:24,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:24,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:53:24,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372741026] [2021-12-15 09:53:24,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:24,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:24,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:24,576 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 09:53:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:25,814 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-15 09:53:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-15 09:53:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:25,827 INFO L225 Difference]: With dead ends: 1122 [2021-12-15 09:53:25,827 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 09:53:25,830 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 09:53:25,832 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 381 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:25,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 254 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:53:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 09:53:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 09:53:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.518910741301059) internal successors, (1004), 661 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 09:53:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2021-12-15 09:53:25,877 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 6 [2021-12-15 09:53:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:25,877 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2021-12-15 09:53:25,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 09:53:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2021-12-15 09:53:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 09:53:25,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:25,879 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:53:25,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:53:25,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:25,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1102951172, now seen corresponding path program 1 times [2021-12-15 09:53:25,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:25,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419562680] [2021-12-15 09:53:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:25,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:53:26,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:26,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419562680] [2021-12-15 09:53:26,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419562680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:26,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:26,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:26,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623339840] [2021-12-15 09:53:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:26,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:26,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:26,018 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 09:53:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:27,583 INFO L93 Difference]: Finished difference Result 2309 states and 3414 transitions. [2021-12-15 09:53:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:53:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 09:53:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:27,589 INFO L225 Difference]: With dead ends: 2309 [2021-12-15 09:53:27,589 INFO L226 Difference]: Without dead ends: 1649 [2021-12-15 09:53:27,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:53:27,591 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1002 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:27,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 42 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:53:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-12-15 09:53:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2021-12-15 09:53:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.4016990291262137) internal successors, (2310), 1648 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 09:53:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2310 transitions. [2021-12-15 09:53:27,618 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2310 transitions. Word has length 74 [2021-12-15 09:53:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:27,619 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2310 transitions. [2021-12-15 09:53:27,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 09:53:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2310 transitions. [2021-12-15 09:53:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-15 09:53:27,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:27,622 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:53:27,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:53:27,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -440952341, now seen corresponding path program 1 times [2021-12-15 09:53:27,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:27,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481688609] [2021-12-15 09:53:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:27,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:53:27,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481688609] [2021-12-15 09:53:27,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481688609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:27,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:27,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:27,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068544579] [2021-12-15 09:53:27,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:27,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:27,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:27,751 INFO L87 Difference]: Start difference. First operand 1649 states and 2310 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 09:53:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:28,761 INFO L93 Difference]: Finished difference Result 2981 states and 4291 transitions. [2021-12-15 09:53:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:53:28,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-12-15 09:53:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:28,766 INFO L225 Difference]: With dead ends: 2981 [2021-12-15 09:53:28,767 INFO L226 Difference]: Without dead ends: 1663 [2021-12-15 09:53:28,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:53:28,772 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 409 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:28,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:53:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-12-15 09:53:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1649. [2021-12-15 09:53:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.3980582524271845) internal successors, (2304), 1648 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states 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 09:53:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2304 transitions. [2021-12-15 09:53:28,798 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2304 transitions. Word has length 137 [2021-12-15 09:53:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:28,799 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2304 transitions. [2021-12-15 09:53:28,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 09:53:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2304 transitions. [2021-12-15 09:53:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-15 09:53:28,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:28,809 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:28,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:53:28,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1078542338, now seen corresponding path program 1 times [2021-12-15 09:53:28,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004618682] [2021-12-15 09:53:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:28,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:53:28,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:28,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004618682] [2021-12-15 09:53:28,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004618682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:28,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:28,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:53:28,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918173237] [2021-12-15 09:53:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:28,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:28,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:28,932 INFO L87 Difference]: Start difference. First operand 1649 states and 2304 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:29,969 INFO L93 Difference]: Finished difference Result 4283 states and 6237 transitions. [2021-12-15 09:53:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-15 09:53:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:29,977 INFO L225 Difference]: With dead ends: 4283 [2021-12-15 09:53:29,977 INFO L226 Difference]: Without dead ends: 2965 [2021-12-15 09:53:29,979 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 09:53:29,980 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:29,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:53:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-15 09:53:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2307. [2021-12-15 09:53:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.349956634865568) internal successors, (3113), 2306 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states 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 09:53:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3113 transitions. [2021-12-15 09:53:30,007 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3113 transitions. Word has length 172 [2021-12-15 09:53:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:30,008 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3113 transitions. [2021-12-15 09:53:30,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:53:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3113 transitions. [2021-12-15 09:53:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-15 09:53:30,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:30,010 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:30,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:53:30,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1796020723, now seen corresponding path program 1 times [2021-12-15 09:53:30,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698778954] [2021-12-15 09:53:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:30,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:30,060 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 09:53:30,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698778954] [2021-12-15 09:53:30,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698778954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:30,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:30,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:30,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741918229] [2021-12-15 09:53:30,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:30,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:30,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:30,063 INFO L87 Difference]: Start difference. First operand 2307 states and 3113 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 09:53:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:30,998 INFO L93 Difference]: Finished difference Result 5599 states and 7663 transitions. [2021-12-15 09:53:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 189 [2021-12-15 09:53:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:31,007 INFO L225 Difference]: With dead ends: 5599 [2021-12-15 09:53:31,007 INFO L226 Difference]: Without dead ends: 3294 [2021-12-15 09:53:31,011 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 09:53:31,012 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 287 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:31,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 539 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:53:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-12-15 09:53:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3294. [2021-12-15 09:53:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 1.0974795019738839) internal successors, (3614), 3293 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states 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 09:53:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3614 transitions. [2021-12-15 09:53:31,055 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3614 transitions. Word has length 189 [2021-12-15 09:53:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:31,055 INFO L470 AbstractCegarLoop]: Abstraction has 3294 states and 3614 transitions. [2021-12-15 09:53:31,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 09:53:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3614 transitions. [2021-12-15 09:53:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 09:53:31,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:31,059 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:31,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:53:31,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 109913575, now seen corresponding path program 1 times [2021-12-15 09:53:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:31,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181177732] [2021-12-15 09:53:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:31,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:53:31,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181177732] [2021-12-15 09:53:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181177732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:31,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106701994] [2021-12-15 09:53:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:31,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:31,155 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 09:53:31,159 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 09:53:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:53:31,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:53:31,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:31,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106701994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:31,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:31,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:53:31,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810428503] [2021-12-15 09:53:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:31,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:31,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:53:31,629 INFO L87 Difference]: Start difference. First operand 3294 states and 3614 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 09:53:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:32,411 INFO L93 Difference]: Finished difference Result 8889 states and 9836 transitions. [2021-12-15 09:53:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-12-15 09:53:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:32,423 INFO L225 Difference]: With dead ends: 8889 [2021-12-15 09:53:32,424 INFO L226 Difference]: Without dead ends: 5597 [2021-12-15 09:53:32,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:53:32,428 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 330 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:32,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 36 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-12-15 09:53:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2021-12-15 09:53:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.1009649749821302) internal successors, (6161), 5596 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states 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 09:53:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 6161 transitions. [2021-12-15 09:53:32,492 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 6161 transitions. Word has length 241 [2021-12-15 09:53:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:32,492 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 6161 transitions. [2021-12-15 09:53:32,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 09:53:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 6161 transitions. [2021-12-15 09:53:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 09:53:32,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:32,495 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:32,515 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 09:53:32,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:53:32,714 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:32,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1484716755, now seen corresponding path program 1 times [2021-12-15 09:53:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949463232] [2021-12-15 09:53:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:32,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:53:32,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:32,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949463232] [2021-12-15 09:53:32,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949463232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:32,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125291125] [2021-12-15 09:53:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:32,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:32,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:32,833 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 09:53:32,834 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 09:53:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:53:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:53:33,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:33,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125291125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:33,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:33,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 09:53:33,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732603889] [2021-12-15 09:53:33,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:33,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:33,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:33,448 INFO L87 Difference]: Start difference. First operand 5597 states and 6161 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 09:53:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:34,066 INFO L93 Difference]: Finished difference Result 11850 states and 13054 transitions. [2021-12-15 09:53:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 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 306 [2021-12-15 09:53:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:34,082 INFO L225 Difference]: With dead ends: 11850 [2021-12-15 09:53:34,082 INFO L226 Difference]: Without dead ends: 6584 [2021-12-15 09:53:34,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:34,086 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:34,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-12-15 09:53:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6584. [2021-12-15 09:53:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 1.0756493999696186) internal successors, (7081), 6583 states have internal predecessors, (7081), 0 states have call successors, (0), 0 states 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 09:53:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 7081 transitions. [2021-12-15 09:53:34,158 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 7081 transitions. Word has length 306 [2021-12-15 09:53:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:34,158 INFO L470 AbstractCegarLoop]: Abstraction has 6584 states and 7081 transitions. [2021-12-15 09:53:34,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 09:53:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 7081 transitions. [2021-12-15 09:53:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-12-15 09:53:34,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:34,162 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:34,185 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 09:53:34,375 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,SelfDestructingSolverStorable6 [2021-12-15 09:53:34,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -620274080, now seen corresponding path program 1 times [2021-12-15 09:53:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653211155] [2021-12-15 09:53:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:34,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-15 09:53:34,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:34,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653211155] [2021-12-15 09:53:34,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653211155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:34,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:34,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:34,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558570578] [2021-12-15 09:53:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:34,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:34,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:34,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:34,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:34,515 INFO L87 Difference]: Start difference. First operand 6584 states and 7081 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 09:53:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:35,250 INFO L93 Difference]: Finished difference Result 15469 states and 16661 transitions. [2021-12-15 09:53:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 399 [2021-12-15 09:53:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:35,269 INFO L225 Difference]: With dead ends: 15469 [2021-12-15 09:53:35,270 INFO L226 Difference]: Without dead ends: 8887 [2021-12-15 09:53:35,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 09:53:35,275 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 336 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:35,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 69 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-15 09:53:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8887. [2021-12-15 09:53:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.0732613099257258) internal successors, (9537), 8886 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states 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 09:53:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9537 transitions. [2021-12-15 09:53:35,388 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9537 transitions. Word has length 399 [2021-12-15 09:53:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:35,389 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9537 transitions. [2021-12-15 09:53:35,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 09:53:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9537 transitions. [2021-12-15 09:53:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-12-15 09:53:35,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:35,395 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:53:35,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 441985475, now seen corresponding path program 1 times [2021-12-15 09:53:35,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480414204] [2021-12-15 09:53:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 09:53:35,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480414204] [2021-12-15 09:53:35,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480414204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:35,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:35,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:35,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413580480] [2021-12-15 09:53:35,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:35,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:35,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:35,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:35,506 INFO L87 Difference]: Start difference. First operand 8887 states and 9537 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 09:53:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:36,259 INFO L93 Difference]: Finished difference Result 19746 states and 21205 transitions. [2021-12-15 09:53:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 506 [2021-12-15 09:53:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:36,293 INFO L225 Difference]: With dead ends: 19746 [2021-12-15 09:53:36,293 INFO L226 Difference]: Without dead ends: 11190 [2021-12-15 09:53:36,301 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 09:53:36,303 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 190 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:36,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 429 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-15 09:53:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 10203. [2021-12-15 09:53:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10202 states have (on average 1.0665555773377768) internal successors, (10881), 10202 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states 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 09:53:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10881 transitions. [2021-12-15 09:53:36,425 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10881 transitions. Word has length 506 [2021-12-15 09:53:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:36,426 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 10881 transitions. [2021-12-15 09:53:36,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 09:53:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10881 transitions. [2021-12-15 09:53:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-12-15 09:53:36,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:36,431 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:36,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:53:36,431 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash -852118930, now seen corresponding path program 1 times [2021-12-15 09:53:36,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627990795] [2021-12-15 09:53:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:36,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 444 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:53:36,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627990795] [2021-12-15 09:53:36,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627990795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:36,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:36,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:36,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261532256] [2021-12-15 09:53:36,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:36,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:36,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:36,547 INFO L87 Difference]: Start difference. First operand 10203 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 09:53:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:37,310 INFO L93 Difference]: Finished difference Result 20075 states and 21429 transitions. [2021-12-15 09:53:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 540 [2021-12-15 09:53:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:37,322 INFO L225 Difference]: With dead ends: 20075 [2021-12-15 09:53:37,323 INFO L226 Difference]: Without dead ends: 10203 [2021-12-15 09:53:37,330 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 09:53:37,331 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 178 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:37,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 412 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-12-15 09:53:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 10203. [2021-12-15 09:53:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10202 states have (on average 1.043520878259165) internal successors, (10646), 10202 states have internal predecessors, (10646), 0 states have call successors, (0), 0 states 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 09:53:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10646 transitions. [2021-12-15 09:53:37,435 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10646 transitions. Word has length 540 [2021-12-15 09:53:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:37,435 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 10646 transitions. [2021-12-15 09:53:37,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 09:53:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10646 transitions. [2021-12-15 09:53:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2021-12-15 09:53:37,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:37,442 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-12-15 09:53:37,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:53:37,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash -949285797, now seen corresponding path program 1 times [2021-12-15 09:53:37,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079131731] [2021-12-15 09:53:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:37,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 12 proven. 448 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-12-15 09:53:37,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079131731] [2021-12-15 09:53:37,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079131731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:37,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229281788] [2021-12-15 09:53:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:37,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:37,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:37,689 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 09:53:37,690 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 09:53:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:53:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-15 09:53:38,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:38,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229281788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:38,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:38,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:53:38,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785041640] [2021-12-15 09:53:38,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:38,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:38,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:38,574 INFO L87 Difference]: Start difference. First operand 10203 states and 10646 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 09:53:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:39,186 INFO L93 Difference]: Finished difference Result 20075 states and 20959 transitions. [2021-12-15 09:53:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:39,186 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 699 [2021-12-15 09:53:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:39,197 INFO L225 Difference]: With dead ends: 20075 [2021-12-15 09:53:39,198 INFO L226 Difference]: Without dead ends: 10203 [2021-12-15 09:53:39,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:39,205 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 361 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 377 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2021-12-15 09:53:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 10203. [2021-12-15 09:53:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10202 states have (on average 1.036659478533621) internal successors, (10576), 10202 states have internal predecessors, (10576), 0 states have call successors, (0), 0 states 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 09:53:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10576 transitions. [2021-12-15 09:53:39,298 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10576 transitions. Word has length 699 [2021-12-15 09:53:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:39,299 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 10576 transitions. [2021-12-15 09:53:39,299 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 09:53:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10576 transitions. [2021-12-15 09:53:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2021-12-15 09:53:39,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:39,317 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:39,345 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 09:53:39,531 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 09:53:39,532 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash -484425439, now seen corresponding path program 1 times [2021-12-15 09:53:39,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:39,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423216505] [2021-12-15 09:53:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:39,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3144 backedges. 1860 proven. 0 refuted. 0 times theorem prover too weak. 1284 trivial. 0 not checked. [2021-12-15 09:53:39,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:39,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423216505] [2021-12-15 09:53:39,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423216505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:39,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:39,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:53:39,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526972605] [2021-12-15 09:53:39,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:39,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:39,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:53:39,893 INFO L87 Difference]: Start difference. First operand 10203 states and 10576 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 09:53:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:40,540 INFO L93 Difference]: Finished difference Result 20733 states and 21520 transitions. [2021-12-15 09:53:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 1237 [2021-12-15 09:53:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:40,553 INFO L225 Difference]: With dead ends: 20733 [2021-12-15 09:53:40,554 INFO L226 Difference]: Without dead ends: 10861 [2021-12-15 09:53:40,561 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 09:53:40,562 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:40,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 440 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-12-15 09:53:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2021-12-15 09:53:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.0338858195211786) internal successors, (11228), 10860 states have internal predecessors, (11228), 0 states have call successors, (0), 0 states 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 09:53:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11228 transitions. [2021-12-15 09:53:40,709 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11228 transitions. Word has length 1237 [2021-12-15 09:53:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:40,710 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11228 transitions. [2021-12-15 09:53:40,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 09:53:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11228 transitions. [2021-12-15 09:53:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1256 [2021-12-15 09:53:40,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:40,728 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2021-12-15 09:53:40,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:53:40,728 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 224895126, now seen corresponding path program 1 times [2021-12-15 09:53:40,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593899142] [2021-12-15 09:53:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:40,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 2517 proven. 132 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-15 09:53:41,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593899142] [2021-12-15 09:53:41,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593899142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354580228] [2021-12-15 09:53:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:41,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:41,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:41,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:53:41,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:53:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:53:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 1523 proven. 0 refuted. 0 times theorem prover too weak. 1652 trivial. 0 not checked. [2021-12-15 09:53:43,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:43,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354580228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:43,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:43,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:53:43,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062996174] [2021-12-15 09:53:43,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:43,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:43,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:43,702 INFO L87 Difference]: Start difference. First operand 10861 states and 11228 transitions. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 09:53:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:44,336 INFO L93 Difference]: Finished difference Result 21391 states and 22123 transitions. [2021-12-15 09:53:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 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 1255 [2021-12-15 09:53:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:44,348 INFO L225 Difference]: With dead ends: 21391 [2021-12-15 09:53:44,348 INFO L226 Difference]: Without dead ends: 10861 [2021-12-15 09:53:44,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1255 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:44,355 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 87 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:44,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 84 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-12-15 09:53:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10861. [2021-12-15 09:53:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.033793738489871) internal successors, (11227), 10860 states have internal predecessors, (11227), 0 states have call successors, (0), 0 states 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 09:53:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11227 transitions. [2021-12-15 09:53:44,435 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11227 transitions. Word has length 1255 [2021-12-15 09:53:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:44,436 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 11227 transitions. [2021-12-15 09:53:44,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 09:53:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11227 transitions. [2021-12-15 09:53:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1286 [2021-12-15 09:53:44,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:44,480 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 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, 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, 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] [2021-12-15 09:53:44,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:44,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:44,702 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2135944521, now seen corresponding path program 1 times [2021-12-15 09:53:44,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442233161] [2021-12-15 09:53:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:44,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 1694 proven. 156 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2021-12-15 09:53:45,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:45,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442233161] [2021-12-15 09:53:45,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442233161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:45,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884240379] [2021-12-15 09:53:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:45,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:45,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:45,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:53:45,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:53:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:45,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:53:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 1850 proven. 0 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2021-12-15 09:53:47,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884240379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:47,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:47,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:53:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182091087] [2021-12-15 09:53:47,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:53:47,263 INFO L87 Difference]: Start difference. First operand 10861 states and 11227 transitions. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states 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 09:53:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:47,972 INFO L93 Difference]: Finished difference Result 23036 states and 23814 transitions. [2021-12-15 09:53:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 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 1285 [2021-12-15 09:53:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:48,010 INFO L225 Difference]: With dead ends: 23036 [2021-12-15 09:53:48,010 INFO L226 Difference]: Without dead ends: 12506 [2021-12-15 09:53:48,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1289 GetRequests, 1284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:53:48,017 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:48,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 101 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-12-15 09:53:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12177. [2021-12-15 09:53:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0311268068331143) internal successors, (12555), 12176 states have internal predecessors, (12555), 0 states have call successors, (0), 0 states 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 09:53:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12555 transitions. [2021-12-15 09:53:48,128 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12555 transitions. Word has length 1285 [2021-12-15 09:53:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12555 transitions. [2021-12-15 09:53:48,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states 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 09:53:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12555 transitions. [2021-12-15 09:53:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1603 [2021-12-15 09:53:48,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:48,153 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:53:48,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:48,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 09:53:48,368 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1375832292, now seen corresponding path program 1 times [2021-12-15 09:53:48,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:48,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124035446] [2021-12-15 09:53:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:48,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4548 backedges. 3184 proven. 0 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2021-12-15 09:53:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124035446] [2021-12-15 09:53:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124035446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:48,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:53:48,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:53:48,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080684877] [2021-12-15 09:53:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:48,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:48,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:53:48,780 INFO L87 Difference]: Start difference. First operand 12177 states and 12555 transitions. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:53:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:49,652 INFO L93 Difference]: Finished difference Result 24374 states and 25130 transitions. [2021-12-15 09:53:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:53:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 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 1602 [2021-12-15 09:53:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:49,665 INFO L225 Difference]: With dead ends: 24374 [2021-12-15 09:53:49,665 INFO L226 Difference]: Without dead ends: 12199 [2021-12-15 09:53:49,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:53:49,672 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 265 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:49,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 449 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:53:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2021-12-15 09:53:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 12177. [2021-12-15 09:53:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0307982917214191) internal successors, (12551), 12176 states have internal predecessors, (12551), 0 states have call successors, (0), 0 states 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 09:53:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12551 transitions. [2021-12-15 09:53:49,772 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12551 transitions. Word has length 1602 [2021-12-15 09:53:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12551 transitions. [2021-12-15 09:53:49,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states 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 09:53:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12551 transitions. [2021-12-15 09:53:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1773 [2021-12-15 09:53:49,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:49,797 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 09:53:49,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:53:49,797 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash 167318333, now seen corresponding path program 1 times [2021-12-15 09:53:49,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325756947] [2021-12-15 09:53:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:49,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5973 backedges. 4141 proven. 764 refuted. 0 times theorem prover too weak. 1068 trivial. 0 not checked. [2021-12-15 09:53:50,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:50,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325756947] [2021-12-15 09:53:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325756947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:50,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569976519] [2021-12-15 09:53:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:50,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:50,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:50,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:53:50,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:53:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:53:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5973 backedges. 3295 proven. 0 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2021-12-15 09:53:53,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569976519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:53,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:53,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-12-15 09:53:53,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220837098] [2021-12-15 09:53:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:53,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:53:53,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:53:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:53:53,183 INFO L87 Difference]: Start difference. First operand 12177 states and 12551 transitions. Second operand has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 09:53:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:54,125 INFO L93 Difference]: Finished difference Result 25997 states and 26767 transitions. [2021-12-15 09:53:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:53:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 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 1772 [2021-12-15 09:53:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:54,135 INFO L225 Difference]: With dead ends: 25997 [2021-12-15 09:53:54,136 INFO L226 Difference]: Without dead ends: 12177 [2021-12-15 09:53:54,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1771 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:53:54,144 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 210 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:54,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 403 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:53:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-15 09:53:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12177. [2021-12-15 09:53:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0288272010512483) internal successors, (12527), 12176 states have internal predecessors, (12527), 0 states have call successors, (0), 0 states 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 09:53:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12527 transitions. [2021-12-15 09:53:54,268 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12527 transitions. Word has length 1772 [2021-12-15 09:53:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:54,269 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12527 transitions. [2021-12-15 09:53:54,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 0 states 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 09:53:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12527 transitions. [2021-12-15 09:53:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1853 [2021-12-15 09:53:54,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:54,295 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:54,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:54,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:53:54,496 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 6268262, now seen corresponding path program 1 times [2021-12-15 09:53:54,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:54,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112552001] [2021-12-15 09:53:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:54,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6634 backedges. 3574 proven. 1509 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-12-15 09:53:55,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112552001] [2021-12-15 09:53:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112552001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017921492] [2021-12-15 09:53:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:55,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:55,068 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:53:55,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:53:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2185 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:53:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:53:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6634 backedges. 3571 proven. 0 refuted. 0 times theorem prover too weak. 3063 trivial. 0 not checked. [2021-12-15 09:53:57,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:53:57,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017921492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:53:57,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:53:57,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 09:53:57,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972715594] [2021-12-15 09:53:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:53:57,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:53:57,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:53:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:53:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:57,371 INFO L87 Difference]: Start difference. First operand 12177 states and 12527 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 09:53:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:53:58,101 INFO L93 Difference]: Finished difference Result 24352 states and 25055 transitions. [2021-12-15 09:53:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:53:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1852 [2021-12-15 09:53:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:53:58,110 INFO L225 Difference]: With dead ends: 24352 [2021-12-15 09:53:58,110 INFO L226 Difference]: Without dead ends: 12506 [2021-12-15 09:53:58,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1858 GetRequests, 1854 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:53:58,114 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:53:58,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 431 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:53:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-12-15 09:53:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2021-12-15 09:53:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0275889644142342) internal successors, (12850), 12505 states have internal predecessors, (12850), 0 states have call successors, (0), 0 states 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 09:53:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12850 transitions. [2021-12-15 09:53:58,209 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12850 transitions. Word has length 1852 [2021-12-15 09:53:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:53:58,209 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12850 transitions. [2021-12-15 09:53:58,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 09:53:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12850 transitions. [2021-12-15 09:53:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1937 [2021-12-15 09:53:58,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:53:58,235 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:53:58,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:53:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:58,437 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:53:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:53:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -956753761, now seen corresponding path program 1 times [2021-12-15 09:53:58,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:53:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586339096] [2021-12-15 09:53:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:58,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:53:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 6127 proven. 96 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-12-15 09:53:59,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:53:59,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586339096] [2021-12-15 09:53:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586339096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:53:59,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379194912] [2021-12-15 09:53:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:53:59,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:53:59,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:53:59,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:53:59,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:53:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:53:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2279 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:53:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:54:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 2426 proven. 0 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2021-12-15 09:54:01,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:54:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379194912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:54:01,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:54:01,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-15 09:54:01,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388504814] [2021-12-15 09:54:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:54:01,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:54:01,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:54:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:54:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:54:01,559 INFO L87 Difference]: Start difference. First operand 12506 states and 12850 transitions. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 09:54:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:54:02,213 INFO L93 Difference]: Finished difference Result 26326 states and 27098 transitions. [2021-12-15 09:54:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:54:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 1936 [2021-12-15 09:54:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:54:02,224 INFO L225 Difference]: With dead ends: 26326 [2021-12-15 09:54:02,224 INFO L226 Difference]: Without dead ends: 14151 [2021-12-15 09:54:02,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1942 GetRequests, 1936 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:54:02,231 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 120 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:54:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 425 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:54:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-15 09:54:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 14151. [2021-12-15 09:54:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.026077738515901) internal successors, (14519), 14150 states have internal predecessors, (14519), 0 states have call successors, (0), 0 states 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 09:54:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14519 transitions. [2021-12-15 09:54:02,335 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14519 transitions. Word has length 1936 [2021-12-15 09:54:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:54:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14519 transitions. [2021-12-15 09:54:02,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 09:54:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14519 transitions. [2021-12-15 09:54:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2092 [2021-12-15 09:54:02,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:54:02,364 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:54:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:54:02,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:54:02,580 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:54:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:54:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1875988515, now seen corresponding path program 1 times [2021-12-15 09:54:02,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:54:02,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513929980] [2021-12-15 09:54:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:54:02,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:54:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:54:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 863 proven. 0 refuted. 0 times theorem prover too weak. 8249 trivial. 0 not checked. [2021-12-15 09:54:03,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:54:03,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513929980] [2021-12-15 09:54:03,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513929980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:54:03,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:54:03,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:54:03,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732932008] [2021-12-15 09:54:03,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:54:03,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:54:03,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:54:03,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:54:03,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:54:03,233 INFO L87 Difference]: Start difference. First operand 14151 states and 14519 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 09:54:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:54:03,937 INFO L93 Difference]: Finished difference Result 29616 states and 30385 transitions. [2021-12-15 09:54:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:54:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 2091 [2021-12-15 09:54:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:54:03,950 INFO L225 Difference]: With dead ends: 29616 [2021-12-15 09:54:03,950 INFO L226 Difference]: Without dead ends: 15796 [2021-12-15 09:54:03,954 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 09:54:03,954 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 266 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:54:03,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 417 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:54:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-15 09:54:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15467. [2021-12-15 09:54:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15467 states, 15466 states have (on average 1.0217250743566533) internal successors, (15802), 15466 states have internal predecessors, (15802), 0 states have call successors, (0), 0 states 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 09:54:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15802 transitions. [2021-12-15 09:54:04,063 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15802 transitions. Word has length 2091 [2021-12-15 09:54:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:54:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 15467 states and 15802 transitions. [2021-12-15 09:54:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 09:54:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15802 transitions. [2021-12-15 09:54:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2160 [2021-12-15 09:54:04,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:54:04,094 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-15 09:54:04,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:54:04,094 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:54:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:54:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash -4174010, now seen corresponding path program 1 times [2021-12-15 09:54:04,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:54:04,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927603223] [2021-12-15 09:54:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:54:04,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:54:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:54:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9485 backedges. 4316 proven. 505 refuted. 0 times theorem prover too weak. 4664 trivial. 0 not checked. [2021-12-15 09:54:04,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:54:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927603223] [2021-12-15 09:54:04,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927603223] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:54:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307450524] [2021-12-15 09:54:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:54:04,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:54:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:54:04,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:54:04,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:54:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:54:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 2523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:54:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:54:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9485 backedges. 5261 proven. 0 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2021-12-15 09:54:07,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:54:07,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307450524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:54:07,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:54:07,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:54:07,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813501445] [2021-12-15 09:54:07,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:54:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:54:07,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:54:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:54:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:54:07,491 INFO L87 Difference]: Start difference. First operand 15467 states and 15802 transitions. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 09:54:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:54:08,379 INFO L93 Difference]: Finished difference Result 33235 states and 33993 transitions. [2021-12-15 09:54:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:54:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 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 2159 [2021-12-15 09:54:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:54:08,394 INFO L225 Difference]: With dead ends: 33235 [2021-12-15 09:54:08,394 INFO L226 Difference]: Without dead ends: 18099 [2021-12-15 09:54:08,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2167 GetRequests, 2161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:54:08,403 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:54:08,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 423 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:54:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-12-15 09:54:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 17770. [2021-12-15 09:54:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17770 states, 17769 states have (on average 1.0213855591198153) internal successors, (18149), 17769 states have internal predecessors, (18149), 0 states have call successors, (0), 0 states 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 09:54:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 18149 transitions. [2021-12-15 09:54:08,538 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 18149 transitions. Word has length 2159 [2021-12-15 09:54:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:54:08,538 INFO L470 AbstractCegarLoop]: Abstraction has 17770 states and 18149 transitions. [2021-12-15 09:54:08,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 09:54:08,539 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 18149 transitions. [2021-12-15 09:54:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2272 [2021-12-15 09:54:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:54:08,629 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-15 09:54:08,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 09:54:08,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:54:08,831 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:54:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:54:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 8671480, now seen corresponding path program 1 times [2021-12-15 09:54:08,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:54:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830145405] [2021-12-15 09:54:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:54:08,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:54:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:54:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10158 backedges. 4515 proven. 601 refuted. 0 times theorem prover too weak. 5042 trivial. 0 not checked. [2021-12-15 09:54:09,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:54:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830145405] [2021-12-15 09:54:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830145405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:54:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222863596] [2021-12-15 09:54:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:54:09,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:54:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:54:09,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:54:09,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 09:54:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:54:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:54:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates...