./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label40.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/Problem18_label40.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 1a53e4c70dff58f3400fe09c8b43892b5493d2ca012910f006ca78f70be38079 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:04:13,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:04:13,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:04:13,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:04:13,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:04:13,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:04:13,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:04:13,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:04:13,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:04:13,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:04:13,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:04:13,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:04:13,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:04:13,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:04:13,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:04:13,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:04:13,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:04:13,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:04:13,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:04:13,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:04:13,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:04:13,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:04:13,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:04:13,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:04:13,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:04:13,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:04:13,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:04:13,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:04:13,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:04:13,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:04:13,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:04:13,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:04:13,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:04:13,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:04:13,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:04:13,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:04:13,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:04:13,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:04:13,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:04:13,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:04:13,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:04:13,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:04:13,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:04:13,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:04:13,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:04:13,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:04:13,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:04:13,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:04:13,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:04:13,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:04:13,876 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:04:13,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:04:13,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:04:13,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:04:13,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:04:13,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:04:13,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:04:13,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:04:13,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:04:13,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:04:13,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:04:13,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:04:13,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:04:13,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:04:13,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:04:13,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:04:13,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:04:13,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:04:13,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:04:13,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:04:13,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:04:13,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:04:13,881 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:04:13,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:04:13,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:04:13,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:04:13,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a53e4c70dff58f3400fe09c8b43892b5493d2ca012910f006ca78f70be38079 [2021-12-15 10:04:14,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:04:14,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:04:14,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:04:14,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:04:14,136 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:04:14,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label40.c [2021-12-15 10:04:14,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57c9f190/8faf67a0bd8c46109decc74ca500b09e/FLAGdd0b56c38 [2021-12-15 10:04:14,774 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:04:14,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label40.c [2021-12-15 10:04:14,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57c9f190/8faf67a0bd8c46109decc74ca500b09e/FLAGdd0b56c38 [2021-12-15 10:04:15,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57c9f190/8faf67a0bd8c46109decc74ca500b09e [2021-12-15 10:04:15,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:04:15,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:04:15,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:04:15,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:04:15,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:04:15,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:15" (1/1) ... [2021-12-15 10:04:15,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38222c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:15, skipping insertion in model container [2021-12-15 10:04:15,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:04:15" (1/1) ... [2021-12-15 10:04:15,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:04:15,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:04:15,497 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/Problem18_label40.c[4742,4755] [2021-12-15 10:04:16,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:04:16,094 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:04:16,120 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/Problem18_label40.c[4742,4755] [2021-12-15 10:04:16,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:04:16,426 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:04:16,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16 WrapperNode [2021-12-15 10:04:16,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:04:16,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:04:16,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:04:16,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:04:16,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,682 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 10:04:16,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:04:16,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:04:16,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:04:16,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:04:16,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:04:16,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:04:16,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:04:16,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:04:16,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (1/1) ... [2021-12-15 10:04:16,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:04:16,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:16,995 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 10:04:17,000 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 10:04:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:04:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:04:17,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:04:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:04:17,078 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:04:17,079 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:04:19,679 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:04:19,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:04:19,692 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:04:19,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:19 BoogieIcfgContainer [2021-12-15 10:04:19,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:04:19,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:04:19,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:04:19,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:04:19,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:04:15" (1/3) ... [2021-12-15 10:04:19,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f476063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:19, skipping insertion in model container [2021-12-15 10:04:19,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:04:16" (2/3) ... [2021-12-15 10:04:19,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f476063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:04:19, skipping insertion in model container [2021-12-15 10:04:19,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:04:19" (3/3) ... [2021-12-15 10:04:19,701 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label40.c [2021-12-15 10:04:19,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:04:19,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:04:19,746 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:04:19,752 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 10:04:19,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:04:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 10:04:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 10:04:19,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:19,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:19,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-12-15 10:04:19,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139253829] [2021-12-15 10:04:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:19,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:20,040 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 10:04:20,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139253829] [2021-12-15 10:04:20,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139253829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:20,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:20,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:04:20,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585842176] [2021-12-15 10:04:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:20,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:20,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:20,078 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:04:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:22,883 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-12-15 10:04:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 10:04:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:22,902 INFO L225 Difference]: With dead ends: 2205 [2021-12-15 10:04:22,903 INFO L226 Difference]: Without dead ends: 1384 [2021-12-15 10:04:22,908 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 10:04:22,911 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 672 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:22,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 532 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 10:04:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-12-15 10:04:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-12-15 10:04:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5777295733911787) internal successors, (2182), 1383 states have internal predecessors, (2182), 0 states have call successors, (0), 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 10:04:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2182 transitions. [2021-12-15 10:04:23,001 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2182 transitions. Word has length 44 [2021-12-15 10:04:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:23,002 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2182 transitions. [2021-12-15 10:04:23,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:04:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2182 transitions. [2021-12-15 10:04:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 10:04:23,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:23,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:04:23,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1373407797, now seen corresponding path program 1 times [2021-12-15 10:04:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715315960] [2021-12-15 10:04:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:23,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:23,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715315960] [2021-12-15 10:04:23,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715315960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:23,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:23,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:04:23,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350375660] [2021-12-15 10:04:23,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:23,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:23,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:23,134 INFO L87 Difference]: Start difference. First operand 1384 states and 2182 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 10:04:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:25,595 INFO L93 Difference]: Finished difference Result 4146 states and 6541 transitions. [2021-12-15 10:04:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 10:04:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:25,612 INFO L225 Difference]: With dead ends: 4146 [2021-12-15 10:04:25,612 INFO L226 Difference]: Without dead ends: 2764 [2021-12-15 10:04:25,614 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 10:04:25,616 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:25,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:04:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-12-15 10:04:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-12-15 10:04:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3481722765110387) internal successors, (3725), 2763 states have internal predecessors, (3725), 0 states have call successors, (0), 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 10:04:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3725 transitions. [2021-12-15 10:04:25,664 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3725 transitions. Word has length 110 [2021-12-15 10:04:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:25,665 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3725 transitions. [2021-12-15 10:04:25,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 10:04:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3725 transitions. [2021-12-15 10:04:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 10:04:25,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:25,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:04:25,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1431757017, now seen corresponding path program 1 times [2021-12-15 10:04:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360881769] [2021-12-15 10:04:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:25,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:25,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:25,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360881769] [2021-12-15 10:04:25,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360881769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:25,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:25,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:04:25,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048402146] [2021-12-15 10:04:25,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:25,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:25,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:25,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:25,835 INFO L87 Difference]: Start difference. First operand 2764 states and 3725 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 10:04:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:28,493 INFO L93 Difference]: Finished difference Result 8288 states and 11171 transitions. [2021-12-15 10:04:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:28,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-15 10:04:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:28,513 INFO L225 Difference]: With dead ends: 8288 [2021-12-15 10:04:28,513 INFO L226 Difference]: Without dead ends: 5526 [2021-12-15 10:04:28,518 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 10:04:28,519 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 690 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:28,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 434 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 10:04:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-12-15 10:04:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 5524. [2021-12-15 10:04:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.2299474923049067) internal successors, (6793), 5523 states have internal predecessors, (6793), 0 states have call successors, (0), 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 10:04:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6793 transitions. [2021-12-15 10:04:28,606 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6793 transitions. Word has length 130 [2021-12-15 10:04:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 6793 transitions. [2021-12-15 10:04:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 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 10:04:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6793 transitions. [2021-12-15 10:04:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-15 10:04:28,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:28,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:28,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:04:28,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash 726837676, now seen corresponding path program 1 times [2021-12-15 10:04:28,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747821875] [2021-12-15 10:04:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:28,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:28,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747821875] [2021-12-15 10:04:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747821875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:28,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:28,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:28,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788597394] [2021-12-15 10:04:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:28,791 INFO L87 Difference]: Start difference. First operand 5524 states and 6793 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 10:04:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:31,770 INFO L93 Difference]: Finished difference Result 12426 states and 15036 transitions. [2021-12-15 10:04:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:04:31,770 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 10:04:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:31,791 INFO L225 Difference]: With dead ends: 12426 [2021-12-15 10:04:31,792 INFO L226 Difference]: Without dead ends: 6904 [2021-12-15 10:04:31,799 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 10:04:31,800 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1923 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4084 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:31,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 640 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4084 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 10:04:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-12-15 10:04:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-12-15 10:04:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.1918006663769376) internal successors, (8227), 6903 states have internal predecessors, (8227), 0 states have call successors, (0), 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 10:04:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8227 transitions. [2021-12-15 10:04:31,906 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8227 transitions. Word has length 137 [2021-12-15 10:04:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:31,907 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8227 transitions. [2021-12-15 10:04:31,907 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 10:04:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8227 transitions. [2021-12-15 10:04:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-15 10:04:31,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:31,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 10:04:31,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:04:31,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash -406301207, now seen corresponding path program 1 times [2021-12-15 10:04:31,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:31,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394804126] [2021-12-15 10:04:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:31,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:32,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394804126] [2021-12-15 10:04:32,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394804126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:32,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:32,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:32,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422030778] [2021-12-15 10:04:32,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:32,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:32,044 INFO L87 Difference]: Start difference. First operand 6904 states and 8227 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 10:04:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:34,344 INFO L93 Difference]: Finished difference Result 18636 states and 22534 transitions. [2021-12-15 10:04:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-12-15 10:04:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:34,379 INFO L225 Difference]: With dead ends: 18636 [2021-12-15 10:04:34,379 INFO L226 Difference]: Without dead ends: 11734 [2021-12-15 10:04:34,388 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 10:04:34,389 INFO L933 BasicCegarLoop]: 1316 mSDtfsCounter, 649 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:34,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1323 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 10:04:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11734 states. [2021-12-15 10:04:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11734 to 11734. [2021-12-15 10:04:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 1.1568226370067332) internal successors, (13573), 11733 states have internal predecessors, (13573), 0 states have call successors, (0), 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 10:04:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 13573 transitions. [2021-12-15 10:04:34,543 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 13573 transitions. Word has length 226 [2021-12-15 10:04:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:34,545 INFO L470 AbstractCegarLoop]: Abstraction has 11734 states and 13573 transitions. [2021-12-15 10:04:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 10:04:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 13573 transitions. [2021-12-15 10:04:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-15 10:04:34,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:34,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:34,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:04:34,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -633537744, now seen corresponding path program 1 times [2021-12-15 10:04:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390082629] [2021-12-15 10:04:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:34,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:34,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390082629] [2021-12-15 10:04:34,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390082629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:34,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519188992] [2021-12-15 10:04:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:34,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:34,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:34,743 INFO L87 Difference]: Start difference. First operand 11734 states and 13573 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 10:04:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:36,977 INFO L93 Difference]: Finished difference Result 26281 states and 30025 transitions. [2021-12-15 10:04:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:04:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 344 [2021-12-15 10:04:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:37,005 INFO L225 Difference]: With dead ends: 26281 [2021-12-15 10:04:37,006 INFO L226 Difference]: Without dead ends: 14496 [2021-12-15 10:04:37,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:37,018 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 517 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:37,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 642 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 10:04:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14496 states. [2021-12-15 10:04:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14496 to 14494. [2021-12-15 10:04:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14494 states, 14493 states have (on average 1.0973573449251364) internal successors, (15904), 14493 states have internal predecessors, (15904), 0 states have call successors, (0), 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 10:04:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 15904 transitions. [2021-12-15 10:04:37,203 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 15904 transitions. Word has length 344 [2021-12-15 10:04:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:37,204 INFO L470 AbstractCegarLoop]: Abstraction has 14494 states and 15904 transitions. [2021-12-15 10:04:37,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 10:04:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 15904 transitions. [2021-12-15 10:04:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-12-15 10:04:37,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:37,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:37,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:04:37,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -916947457, now seen corresponding path program 1 times [2021-12-15 10:04:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915983001] [2021-12-15 10:04:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:37,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 10:04:37,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915983001] [2021-12-15 10:04:37,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915983001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:37,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:37,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:37,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298696512] [2021-12-15 10:04:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:37,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:37,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:37,412 INFO L87 Difference]: Start difference. First operand 14494 states and 15904 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 10:04:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:39,376 INFO L93 Difference]: Finished difference Result 33126 states and 36871 transitions. [2021-12-15 10:04:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 429 [2021-12-15 10:04:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:39,406 INFO L225 Difference]: With dead ends: 33126 [2021-12-15 10:04:39,407 INFO L226 Difference]: Without dead ends: 18634 [2021-12-15 10:04:39,421 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 10:04:39,422 INFO L933 BasicCegarLoop]: 1128 mSDtfsCounter, 649 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:39,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1135 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 10:04:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-12-15 10:04:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 18634. [2021-12-15 10:04:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.0991252079643643) internal successors, (20480), 18633 states have internal predecessors, (20480), 0 states have call successors, (0), 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 10:04:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 20480 transitions. [2021-12-15 10:04:39,629 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 20480 transitions. Word has length 429 [2021-12-15 10:04:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:39,630 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 20480 transitions. [2021-12-15 10:04:39,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 10:04:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 20480 transitions. [2021-12-15 10:04:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-15 10:04:39,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:39,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:39,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 10:04:39,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1071276579, now seen corresponding path program 1 times [2021-12-15 10:04:39,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:39,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314859659] [2021-12-15 10:04:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:39,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:39,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:39,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314859659] [2021-12-15 10:04:39,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314859659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:39,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:39,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:39,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405349321] [2021-12-15 10:04:39,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:39,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:39,873 INFO L87 Difference]: Start difference. First operand 18634 states and 20480 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 10:04:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:41,699 INFO L93 Difference]: Finished difference Result 42786 states and 47405 transitions. [2021-12-15 10:04:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 450 [2021-12-15 10:04:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:41,730 INFO L225 Difference]: With dead ends: 42786 [2021-12-15 10:04:41,731 INFO L226 Difference]: Without dead ends: 24154 [2021-12-15 10:04:41,749 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 10:04:41,750 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 586 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:41,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 979 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24154 states. [2021-12-15 10:04:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24154 to 23464. [2021-12-15 10:04:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 23463 states have (on average 1.0924860418531304) internal successors, (25633), 23463 states have internal predecessors, (25633), 0 states have call successors, (0), 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 10:04:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 25633 transitions. [2021-12-15 10:04:42,006 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 25633 transitions. Word has length 450 [2021-12-15 10:04:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:42,007 INFO L470 AbstractCegarLoop]: Abstraction has 23464 states and 25633 transitions. [2021-12-15 10:04:42,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 10:04:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 25633 transitions. [2021-12-15 10:04:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-12-15 10:04:42,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:42,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:42,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 10:04:42,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:42,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1130128182, now seen corresponding path program 1 times [2021-12-15 10:04:42,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:42,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847817686] [2021-12-15 10:04:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:42,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:04:42,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:42,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847817686] [2021-12-15 10:04:42,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847817686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:42,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:42,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:42,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224952584] [2021-12-15 10:04:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:42,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:42,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:42,213 INFO L87 Difference]: Start difference. First operand 23464 states and 25633 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 10:04:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:44,167 INFO L93 Difference]: Finished difference Result 51066 states and 56287 transitions. [2021-12-15 10:04:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 457 [2021-12-15 10:04:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:44,196 INFO L225 Difference]: With dead ends: 51066 [2021-12-15 10:04:44,196 INFO L226 Difference]: Without dead ends: 28294 [2021-12-15 10:04:44,214 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 10:04:44,214 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 589 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:44,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 388 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:04:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28294 states. [2021-12-15 10:04:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28294 to 28294. [2021-12-15 10:04:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28294 states, 28293 states have (on average 1.0900222669918354) internal successors, (30840), 28293 states have internal predecessors, (30840), 0 states have call successors, (0), 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 10:04:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 30840 transitions. [2021-12-15 10:04:44,579 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 30840 transitions. Word has length 457 [2021-12-15 10:04:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:44,580 INFO L470 AbstractCegarLoop]: Abstraction has 28294 states and 30840 transitions. [2021-12-15 10:04:44,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 10:04:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 30840 transitions. [2021-12-15 10:04:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2021-12-15 10:04:44,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:44,610 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:44,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:04:44,611 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1708488638, now seen corresponding path program 1 times [2021-12-15 10:04:44,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:44,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988606822] [2021-12-15 10:04:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:44,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 126 proven. 489 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-15 10:04:45,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988606822] [2021-12-15 10:04:45,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988606822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853246290] [2021-12-15 10:04:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:45,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:45,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:45,087 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 10:04:45,091 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 10:04:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-12-15 10:04:46,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:46,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853246290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:46,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:46,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 10:04:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915498049] [2021-12-15 10:04:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:46,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:46,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:46,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:46,791 INFO L87 Difference]: Start difference. First operand 28294 states and 30840 transitions. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 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 10:04:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:48,400 INFO L93 Difference]: Finished difference Result 55206 states and 60294 transitions. [2021-12-15 10:04:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 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 1011 [2021-12-15 10:04:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:48,428 INFO L225 Difference]: With dead ends: 55206 [2021-12-15 10:04:48,429 INFO L226 Difference]: Without dead ends: 28294 [2021-12-15 10:04:48,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:48,447 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 753 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:48,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 780 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 10:04:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28294 states. [2021-12-15 10:04:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28294 to 28294. [2021-12-15 10:04:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28294 states, 28293 states have (on average 1.0751069169052416) internal successors, (30418), 28293 states have internal predecessors, (30418), 0 states have call successors, (0), 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 10:04:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 30418 transitions. [2021-12-15 10:04:48,880 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 30418 transitions. Word has length 1011 [2021-12-15 10:04:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:48,882 INFO L470 AbstractCegarLoop]: Abstraction has 28294 states and 30418 transitions. [2021-12-15 10:04:48,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 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 10:04:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 30418 transitions. [2021-12-15 10:04:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2021-12-15 10:04:48,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:48,899 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:48,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 10:04:49,121 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,SelfDestructingSolverStorable9 [2021-12-15 10:04:49,122 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -990780838, now seen corresponding path program 1 times [2021-12-15 10:04:49,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:49,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448616871] [2021-12-15 10:04:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:49,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-15 10:04:49,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:49,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448616871] [2021-12-15 10:04:49,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448616871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:49,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 10:04:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113976782] [2021-12-15 10:04:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:04:49,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:04:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:49,644 INFO L87 Difference]: Start difference. First operand 28294 states and 30418 transitions. Second operand has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 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 10:04:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:52,226 INFO L93 Difference]: Finished difference Result 63620 states and 68909 transitions. [2021-12-15 10:04:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:04:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 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 1051 [2021-12-15 10:04:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:52,268 INFO L225 Difference]: With dead ends: 63620 [2021-12-15 10:04:52,268 INFO L226 Difference]: Without dead ends: 36708 [2021-12-15 10:04:52,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:04:52,290 INFO L933 BasicCegarLoop]: 1118 mSDtfsCounter, 1971 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 3912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:52,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1971 Valid, 1131 Invalid, 3912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:04:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-12-15 10:04:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 36574. [2021-12-15 10:04:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36574 states, 36573 states have (on average 1.064063653514888) internal successors, (38916), 36573 states have internal predecessors, (38916), 0 states have call successors, (0), 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 10:04:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36574 states to 36574 states and 38916 transitions. [2021-12-15 10:04:52,815 INFO L78 Accepts]: Start accepts. Automaton has 36574 states and 38916 transitions. Word has length 1051 [2021-12-15 10:04:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:52,816 INFO L470 AbstractCegarLoop]: Abstraction has 36574 states and 38916 transitions. [2021-12-15 10:04:52,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 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 10:04:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 36574 states and 38916 transitions. [2021-12-15 10:04:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1128 [2021-12-15 10:04:52,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:52,836 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:52,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 10:04:52,837 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash -742910925, now seen corresponding path program 1 times [2021-12-15 10:04:52,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:52,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71353524] [2021-12-15 10:04:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:52,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 840 proven. 280 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-15 10:04:53,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:53,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71353524] [2021-12-15 10:04:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71353524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:53,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633085527] [2021-12-15 10:04:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:53,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:53,555 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 10:04:53,568 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 10:04:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-12-15 10:04:55,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633085527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:55,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:04:55,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822602570] [2021-12-15 10:04:55,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:55,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:55,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:55,234 INFO L87 Difference]: Start difference. First operand 36574 states and 38916 transitions. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:04:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:57,028 INFO L93 Difference]: Finished difference Result 81426 states and 87713 transitions. [2021-12-15 10:04:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:57,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1127 [2021-12-15 10:04:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:57,072 INFO L225 Difference]: With dead ends: 81426 [2021-12-15 10:04:57,072 INFO L226 Difference]: Without dead ends: 46234 [2021-12-15 10:04:57,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1133 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:04:57,099 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 693 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:57,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 198 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:04:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46234 states. [2021-12-15 10:04:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46234 to 46234. [2021-12-15 10:04:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.0703177384119569) internal successors, (49484), 46233 states have internal predecessors, (49484), 0 states have call successors, (0), 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 10:04:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 49484 transitions. [2021-12-15 10:04:57,497 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 49484 transitions. Word has length 1127 [2021-12-15 10:04:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:57,498 INFO L470 AbstractCegarLoop]: Abstraction has 46234 states and 49484 transitions. [2021-12-15 10:04:57,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:04:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 49484 transitions. [2021-12-15 10:04:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1134 [2021-12-15 10:04:57,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:57,514 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:57,541 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 10:04:57,731 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,SelfDestructingSolverStorable11 [2021-12-15 10:04:57,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1068820932, now seen corresponding path program 1 times [2021-12-15 10:04:57,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961180010] [2021-12-15 10:04:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:57,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 858 proven. 280 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-15 10:04:58,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961180010] [2021-12-15 10:04:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961180010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170738081] [2021-12-15 10:04:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:58,384 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 10:04:58,419 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 10:04:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:58,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:05:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-12-15 10:05:00,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:05:00,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170738081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:00,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:05:00,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:05:00,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145343375] [2021-12-15 10:05:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:05:00,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:05:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:00,041 INFO L87 Difference]: Start difference. First operand 46234 states and 49484 transitions. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 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 10:05:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:01,939 INFO L93 Difference]: Finished difference Result 103506 states and 112072 transitions. [2021-12-15 10:05:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:05:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 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 1133 [2021-12-15 10:05:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:02,004 INFO L225 Difference]: With dead ends: 103506 [2021-12-15 10:05:02,004 INFO L226 Difference]: Without dead ends: 52444 [2021-12-15 10:05:02,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:02,038 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 647 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:02,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 975 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:05:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52444 states. [2021-12-15 10:05:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52444 to 51064. [2021-12-15 10:05:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51064 states, 51063 states have (on average 1.0468636782014373) internal successors, (53456), 51063 states have internal predecessors, (53456), 0 states have call successors, (0), 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 10:05:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51064 states to 51064 states and 53456 transitions. [2021-12-15 10:05:02,562 INFO L78 Accepts]: Start accepts. Automaton has 51064 states and 53456 transitions. Word has length 1133 [2021-12-15 10:05:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:02,562 INFO L470 AbstractCegarLoop]: Abstraction has 51064 states and 53456 transitions. [2021-12-15 10:05:02,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 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 10:05:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51064 states and 53456 transitions. [2021-12-15 10:05:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1332 [2021-12-15 10:05:02,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:02,588 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:05:02,614 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 10:05:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:05:02,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1363196974, now seen corresponding path program 1 times [2021-12-15 10:05:02,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166555230] [2021-12-15 10:05:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:02,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:05:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1340 proven. 330 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-12-15 10:05:03,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:05:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166555230] [2021-12-15 10:05:03,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166555230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:05:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995114459] [2021-12-15 10:05:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:03,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:05:03,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:05:03,474 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 10:05:03,517 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 10:05:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:05:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:05:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:05:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1067 proven. 0 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2021-12-15 10:05:05,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:05:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995114459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:05:05,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:05:05,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-15 10:05:05,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974534285] [2021-12-15 10:05:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:05:05,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:05:05,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:05:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:05:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:05,368 INFO L87 Difference]: Start difference. First operand 51064 states and 53456 transitions. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 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 10:05:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:05:07,202 INFO L93 Difference]: Finished difference Result 123516 states and 129725 transitions. [2021-12-15 10:05:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:05:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 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 1331 [2021-12-15 10:05:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:05:07,274 INFO L225 Difference]: With dead ends: 123516 [2021-12-15 10:05:07,274 INFO L226 Difference]: Without dead ends: 73144 [2021-12-15 10:05:07,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1330 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:05:07,299 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 607 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:05:07,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 876 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 10:05:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73144 states. [2021-12-15 10:05:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73144 to 73144. [2021-12-15 10:05:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 1.0431620250741698) internal successors, (76300), 73143 states have internal predecessors, (76300), 0 states have call successors, (0), 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 10:05:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 76300 transitions. [2021-12-15 10:05:08,003 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 76300 transitions. Word has length 1331 [2021-12-15 10:05:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:05:08,004 INFO L470 AbstractCegarLoop]: Abstraction has 73144 states and 76300 transitions. [2021-12-15 10:05:08,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 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 10:05:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 76300 transitions. [2021-12-15 10:05:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2021-12-15 10:05:08,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:05:08,059 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 10:05:08,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 10:05:08,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:05:08,261 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:05:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:05:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash -149244936, now seen corresponding path program 1 times [2021-12-15 10:05:08,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:05:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500833206] [2021-12-15 10:05:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:05:08,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms