./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_label59.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 0a63aae7d1f02b4e9c71d21b1a38636567f9033d5bd902c4c164ca5448d8cc38 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:28:32,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:28:32,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:28:32,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:28:32,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:28:32,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:28:32,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:28:32,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:28:32,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:28:32,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:28:32,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:28:32,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:28:32,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:28:32,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:28:32,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:28:32,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:28:32,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:28:32,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:28:32,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:28:32,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:28:32,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:28:32,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:28:32,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:28:32,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:28:32,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:28:32,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:28:32,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:28:32,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:28:32,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:28:32,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:28:32,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:28:32,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:28:32,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:28:32,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:28:32,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:28:32,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:28:32,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:28:32,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:28:32,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:28:32,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:28:32,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:28:32,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:28:32,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:28:32,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:28:32,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:28:32,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:28:32,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:28:32,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:28:32,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:28:32,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:28:32,652 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:28:32,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:28:32,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:28:32,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:28:32,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:28:32,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:28:32,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:28:32,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:28:32,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:28:32,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a63aae7d1f02b4e9c71d21b1a38636567f9033d5bd902c4c164ca5448d8cc38 [2021-12-21 11:28:32,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:28:32,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:28:32,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:28:32,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:28:32,830 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:28:32,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label59.c [2021-12-21 11:28:32,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a8e27d4c/b51dcb477cbc4510b6c244d1c86c453b/FLAG7c2e4b25e [2021-12-21 11:28:33,515 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:28:33,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label59.c [2021-12-21 11:28:33,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a8e27d4c/b51dcb477cbc4510b6c244d1c86c453b/FLAG7c2e4b25e [2021-12-21 11:28:33,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a8e27d4c/b51dcb477cbc4510b6c244d1c86c453b [2021-12-21 11:28:33,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:28:33,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:28:33,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:28:33,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:28:33,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:28:33,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:28:33" (1/1) ... [2021-12-21 11:28:33,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561a0099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:33, skipping insertion in model container [2021-12-21 11:28:33,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:28:33" (1/1) ... [2021-12-21 11:28:33,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:28:34,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:28:34,224 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_label59.c[4061,4074] [2021-12-21 11:28:34,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:28:34,568 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:28:34,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label59.c[4061,4074] [2021-12-21 11:28:34,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:28:34,803 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:28:34,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34 WrapperNode [2021-12-21 11:28:34,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:28:34,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:28:34,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:28:34,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:28:34,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:34,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:34,987 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-21 11:28:34,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:28:34,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:28:34,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:28:34,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:28:34,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:34,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:28:35,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:28:35,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:28:35,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:28:35,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (1/1) ... [2021-12-21 11:28:35,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:28:35,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:28:35,184 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) [2021-12-21 11:28:35,226 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 [2021-12-21 11:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:28:35,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:28:35,289 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:28:35,291 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:28:37,796 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:28:37,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:28:37,804 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:28:37,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:28:37 BoogieIcfgContainer [2021-12-21 11:28:37,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:28:37,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:28:37,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:28:37,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:28:37,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:28:33" (1/3) ... [2021-12-21 11:28:37,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59365f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:28:37, skipping insertion in model container [2021-12-21 11:28:37,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:28:34" (2/3) ... [2021-12-21 11:28:37,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59365f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:28:37, skipping insertion in model container [2021-12-21 11:28:37,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:28:37" (3/3) ... [2021-12-21 11:28:37,812 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label59.c [2021-12-21 11:28:37,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:28:37,816 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:28:37,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:28:37,854 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 [2021-12-21 11:28:37,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:28:37,873 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) [2021-12-21 11:28:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 11:28:37,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:37,879 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] [2021-12-21 11:28:37,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2021-12-21 11:28:37,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596934285] [2021-12-21 11:28:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:37,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:28:38,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596934285] [2021-12-21 11:28:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596934285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:38,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:28:38,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986097908] [2021-12-21 11:28:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:38,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:38,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:38,118 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 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:40,301 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-12-21 11:28:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-21 11:28:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:40,321 INFO L225 Difference]: With dead ends: 2205 [2021-12-21 11:28:40,321 INFO L226 Difference]: Without dead ends: 1384 [2021-12-21 11:28:40,326 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 [2021-12-21 11:28:40,330 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 726 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:40,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 71 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:28:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-12-21 11:28:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-12-21 11:28:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.8770788141720895) internal successors, (2596), 1383 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2596 transitions. [2021-12-21 11:28:40,417 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2596 transitions. Word has length 37 [2021-12-21 11:28:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:40,418 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2596 transitions. [2021-12-21 11:28:40,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2596 transitions. [2021-12-21 11:28:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 11:28:40,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:40,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:28:40,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:28:40,426 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1863761702, now seen corresponding path program 1 times [2021-12-21 11:28:40,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:40,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251681883] [2021-12-21 11:28:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:40,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:28:40,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251681883] [2021-12-21 11:28:40,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251681883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:40,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:40,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:28:40,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212325562] [2021-12-21 11:28:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:40,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:40,508 INFO L87 Difference]: Start difference. First operand 1384 states and 2596 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:42,900 INFO L93 Difference]: Finished difference Result 4146 states and 7783 transitions. [2021-12-21 11:28:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-12-21 11:28:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:42,909 INFO L225 Difference]: With dead ends: 4146 [2021-12-21 11:28:42,910 INFO L226 Difference]: Without dead ends: 2764 [2021-12-21 11:28:42,915 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 [2021-12-21 11:28:42,918 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 709 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:42,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 537 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:28:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-12-21 11:28:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-12-21 11:28:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.5153818313427434) internal successors, (4187), 2763 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4187 transitions. [2021-12-21 11:28:42,970 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4187 transitions. Word has length 102 [2021-12-21 11:28:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:42,972 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 4187 transitions. [2021-12-21 11:28:42,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4187 transitions. [2021-12-21 11:28:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 11:28:42,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:42,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:28:42,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:28:42,981 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:42,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 117951620, now seen corresponding path program 1 times [2021-12-21 11:28:42,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:42,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258715169] [2021-12-21 11:28:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:42,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:28:43,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258715169] [2021-12-21 11:28:43,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258715169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:43,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:43,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:28:43,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340701895] [2021-12-21 11:28:43,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:43,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:43,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:43,085 INFO L87 Difference]: Start difference. First operand 2764 states and 4187 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:45,242 INFO L93 Difference]: Finished difference Result 8286 states and 12556 transitions. [2021-12-21 11:28:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-21 11:28:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:45,257 INFO L225 Difference]: With dead ends: 8286 [2021-12-21 11:28:45,257 INFO L226 Difference]: Without dead ends: 5524 [2021-12-21 11:28:45,259 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 [2021-12-21 11:28:45,266 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 732 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:45,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 109 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:28:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-12-21 11:28:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5524. [2021-12-21 11:28:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.463516204961072) internal successors, (8083), 5523 states have internal predecessors, (8083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 8083 transitions. [2021-12-21 11:28:45,337 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 8083 transitions. Word has length 105 [2021-12-21 11:28:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:45,338 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 8083 transitions. [2021-12-21 11:28:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 8083 transitions. [2021-12-21 11:28:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 11:28:45,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:45,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:28:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:28:45,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash 497433312, now seen corresponding path program 1 times [2021-12-21 11:28:45,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:45,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136093374] [2021-12-21 11:28:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:45,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:28:45,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:45,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136093374] [2021-12-21 11:28:45,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136093374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:45,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:45,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:45,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917551942] [2021-12-21 11:28:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:45,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:28:45,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:28:45,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:28:45,501 INFO L87 Difference]: Start difference. First operand 5524 states and 8083 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 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) [2021-12-21 11:28:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:48,768 INFO L93 Difference]: Finished difference Result 13116 states and 18840 transitions. [2021-12-21 11:28:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:28:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 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 [2021-12-21 11:28:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:48,803 INFO L225 Difference]: With dead ends: 13116 [2021-12-21 11:28:48,804 INFO L226 Difference]: Without dead ends: 7594 [2021-12-21 11:28:48,810 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 [2021-12-21 11:28:48,827 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4348 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 4348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:48,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 641 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 4348 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 11:28:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-12-21 11:28:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2021-12-21 11:28:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.3925829349558163) internal successors, (9613), 6903 states have internal predecessors, (9613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 9613 transitions. [2021-12-21 11:28:49,023 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 9613 transitions. Word has length 130 [2021-12-21 11:28:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 9613 transitions. [2021-12-21 11:28:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 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) [2021-12-21 11:28:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 9613 transitions. [2021-12-21 11:28:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-21 11:28:49,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:49,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:28:49,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:28:49,026 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1014438111, now seen corresponding path program 1 times [2021-12-21 11:28:49,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:49,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999720234] [2021-12-21 11:28:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:49,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:28:49,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999720234] [2021-12-21 11:28:49,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999720234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:49,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:49,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:49,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934460491] [2021-12-21 11:28:49,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:49,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:49,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:49,132 INFO L87 Difference]: Start difference. First operand 6904 states and 9613 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:50,879 INFO L93 Difference]: Finished difference Result 17946 states and 24650 transitions. [2021-12-21 11:28:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-12-21 11:28:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:50,899 INFO L225 Difference]: With dead ends: 17946 [2021-12-21 11:28:50,899 INFO L226 Difference]: Without dead ends: 8974 [2021-12-21 11:28:50,905 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 [2021-12-21 11:28:50,906 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 712 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:50,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1215 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:28:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-12-21 11:28:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2021-12-21 11:28:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1532374902485234) internal successors, (10348), 8973 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10348 transitions. [2021-12-21 11:28:51,021 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10348 transitions. Word has length 219 [2021-12-21 11:28:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:51,022 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10348 transitions. [2021-12-21 11:28:51,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10348 transitions. [2021-12-21 11:28:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-12-21 11:28:51,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:51,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 11:28:51,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:28:51,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 829823047, now seen corresponding path program 1 times [2021-12-21 11:28:51,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:51,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66714022] [2021-12-21 11:28:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:51,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-21 11:28:51,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66714022] [2021-12-21 11:28:51,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66714022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:51,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:51,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:51,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525766096] [2021-12-21 11:28:51,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:51,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:51,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:51,182 INFO L87 Difference]: Start difference. First operand 8974 states and 10348 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:52,638 INFO L93 Difference]: Finished difference Result 17946 states and 20694 transitions. [2021-12-21 11:28:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 490 [2021-12-21 11:28:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:52,662 INFO L225 Difference]: With dead ends: 17946 [2021-12-21 11:28:52,662 INFO L226 Difference]: Without dead ends: 8974 [2021-12-21 11:28:52,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:52,670 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 760 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:52,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 746 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:28:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-12-21 11:28:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2021-12-21 11:28:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1395297002117464) internal successors, (10225), 8973 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10225 transitions. [2021-12-21 11:28:52,761 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10225 transitions. Word has length 490 [2021-12-21 11:28:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10225 transitions. [2021-12-21 11:28:52,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10225 transitions. [2021-12-21 11:28:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-12-21 11:28:52,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:52,770 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, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 11:28:52,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:28:52,770 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1673038073, now seen corresponding path program 1 times [2021-12-21 11:28:52,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:52,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986041155] [2021-12-21 11:28:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:52,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 269 proven. 215 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-21 11:28:52,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986041155] [2021-12-21 11:28:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986041155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:28:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014520794] [2021-12-21 11:28:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:52,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:28:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:28:52,983 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) [2021-12-21 11:28:53,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:28:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:28:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:28:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-21 11:28:53,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:28:53,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014520794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:53,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:28:53,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 11:28:53,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651860902] [2021-12-21 11:28:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:53,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:53,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:28:53,919 INFO L87 Difference]: Start difference. First operand 8974 states and 10225 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:55,341 INFO L93 Difference]: Finished difference Result 21396 states and 24518 transitions. [2021-12-21 11:28:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 554 [2021-12-21 11:28:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:55,373 INFO L225 Difference]: With dead ends: 21396 [2021-12-21 11:28:55,373 INFO L226 Difference]: Without dead ends: 12424 [2021-12-21 11:28:55,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:28:55,383 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 684 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:55,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 118 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:28:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2021-12-21 11:28:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 12424. [2021-12-21 11:28:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.1101183289060614) internal successors, (13791), 12423 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 13791 transitions. [2021-12-21 11:28:55,513 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 13791 transitions. Word has length 554 [2021-12-21 11:28:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:55,514 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 13791 transitions. [2021-12-21 11:28:55,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 13791 transitions. [2021-12-21 11:28:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-21 11:28:55,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:55,524 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, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-21 11:28:55,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 11:28:55,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:28:55,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash 793313847, now seen corresponding path program 1 times [2021-12-21 11:28:55,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:55,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185078784] [2021-12-21 11:28:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:55,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 518 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 11:28:55,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185078784] [2021-12-21 11:28:55,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185078784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:55,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:55,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:55,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256284645] [2021-12-21 11:28:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:55,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:55,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:55,953 INFO L87 Difference]: Start difference. First operand 12424 states and 13791 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:57,519 INFO L93 Difference]: Finished difference Result 31056 states and 34453 transitions. [2021-12-21 11:28:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:57,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 621 [2021-12-21 11:28:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:57,546 INFO L225 Difference]: With dead ends: 31056 [2021-12-21 11:28:57,547 INFO L226 Difference]: Without dead ends: 18634 [2021-12-21 11:28:57,559 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 [2021-12-21 11:28:57,560 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 575 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 914 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:28:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-12-21 11:28:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 18634. [2021-12-21 11:28:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18634 states, 18633 states have (on average 1.0891429184779693) internal successors, (20294), 18633 states have internal predecessors, (20294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 20294 transitions. [2021-12-21 11:28:57,810 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 20294 transitions. Word has length 621 [2021-12-21 11:28:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:57,811 INFO L470 AbstractCegarLoop]: Abstraction has 18634 states and 20294 transitions. [2021-12-21 11:28:57,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 20294 transitions. [2021-12-21 11:28:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2021-12-21 11:28:57,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:57,819 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:28:57,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:28:57,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -417062094, now seen corresponding path program 1 times [2021-12-21 11:28:57,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549671079] [2021-12-21 11:28:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:57,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-21 11:28:57,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549671079] [2021-12-21 11:28:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549671079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:57,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377553461] [2021-12-21 11:28:57,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:57,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:57,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:57,995 INFO L87 Difference]: Start difference. First operand 18634 states and 20294 transitions. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:28:59,471 INFO L93 Difference]: Finished difference Result 37266 states and 40586 transitions. [2021-12-21 11:28:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:28:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 654 [2021-12-21 11:28:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:28:59,489 INFO L225 Difference]: With dead ends: 37266 [2021-12-21 11:28:59,490 INFO L226 Difference]: Without dead ends: 18634 [2021-12-21 11:28:59,501 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 [2021-12-21 11:28:59,502 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 658 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:28:59,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 953 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:28:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18634 states. [2021-12-21 11:28:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18634 to 17944. [2021-12-21 11:28:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 17943 states have (on average 1.0732319010198963) internal successors, (19257), 17943 states have internal predecessors, (19257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 19257 transitions. [2021-12-21 11:28:59,649 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 19257 transitions. Word has length 654 [2021-12-21 11:28:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:28:59,650 INFO L470 AbstractCegarLoop]: Abstraction has 17944 states and 19257 transitions. [2021-12-21 11:28:59,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:28:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 19257 transitions. [2021-12-21 11:28:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-12-21 11:28:59,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:28:59,658 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:28:59,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:28:59,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:28:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:28:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1387245139, now seen corresponding path program 1 times [2021-12-21 11:28:59,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:28:59,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397646766] [2021-12-21 11:28:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:28:59,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:28:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:28:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-21 11:28:59,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:28:59,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397646766] [2021-12-21 11:28:59,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397646766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:28:59,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:28:59,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:28:59,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371054519] [2021-12-21 11:28:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:28:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:28:59,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:28:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:28:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:28:59,809 INFO L87 Difference]: Start difference. First operand 17944 states and 19257 transitions. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:01,067 INFO L93 Difference]: Finished difference Result 44166 states and 47748 transitions. [2021-12-21 11:29:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:01,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 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 680 [2021-12-21 11:29:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:01,089 INFO L225 Difference]: With dead ends: 44166 [2021-12-21 11:29:01,089 INFO L226 Difference]: Without dead ends: 23464 [2021-12-21 11:29:01,100 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 [2021-12-21 11:29:01,102 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 518 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:01,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 936 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:29:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23464 states. [2021-12-21 11:29:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23464 to 23464. [2021-12-21 11:29:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 23463 states have (on average 1.0650811916634702) internal successors, (24990), 23463 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 24990 transitions. [2021-12-21 11:29:01,332 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 24990 transitions. Word has length 680 [2021-12-21 11:29:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:01,333 INFO L470 AbstractCegarLoop]: Abstraction has 23464 states and 24990 transitions. [2021-12-21 11:29:01,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 24990 transitions. [2021-12-21 11:29:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-21 11:29:01,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:01,342 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:29:01,342 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1816102198, now seen corresponding path program 1 times [2021-12-21 11:29:01,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:01,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578725730] [2021-12-21 11:29:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:01,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-12-21 11:29:01,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578725730] [2021-12-21 11:29:01,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578725730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:01,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:01,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:01,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116980115] [2021-12-21 11:29:01,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:01,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:01,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:01,535 INFO L87 Difference]: Start difference. First operand 23464 states and 24990 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:02,458 INFO L93 Difference]: Finished difference Result 46937 states and 49989 transitions. [2021-12-21 11:29:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 713 [2021-12-21 11:29:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:02,515 INFO L225 Difference]: With dead ends: 46937 [2021-12-21 11:29:02,515 INFO L226 Difference]: Without dead ends: 23464 [2021-12-21 11:29:02,543 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 [2021-12-21 11:29:02,544 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:02,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 986 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:29:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23464 states. [2021-12-21 11:29:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23464 to 23464. [2021-12-21 11:29:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 23463 states have (on average 1.0649959510719005) internal successors, (24988), 23463 states have internal predecessors, (24988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 24988 transitions. [2021-12-21 11:29:03,008 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 24988 transitions. Word has length 713 [2021-12-21 11:29:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:03,009 INFO L470 AbstractCegarLoop]: Abstraction has 23464 states and 24988 transitions. [2021-12-21 11:29:03,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 24988 transitions. [2021-12-21 11:29:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-12-21 11:29:03,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:03,024 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:03,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:29:03,024 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1979766220, now seen corresponding path program 1 times [2021-12-21 11:29:03,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:03,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530463892] [2021-12-21 11:29:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 790 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-12-21 11:29:03,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530463892] [2021-12-21 11:29:03,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530463892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:03,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:03,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:03,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400819502] [2021-12-21 11:29:03,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:03,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:03,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:03,205 INFO L87 Difference]: Start difference. First operand 23464 states and 24988 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:04,841 INFO L93 Difference]: Finished difference Result 47616 states and 50693 transitions. [2021-12-21 11:29:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 794 [2021-12-21 11:29:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:04,866 INFO L225 Difference]: With dead ends: 47616 [2021-12-21 11:29:04,866 INFO L226 Difference]: Without dead ends: 24154 [2021-12-21 11:29:04,881 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 [2021-12-21 11:29:04,882 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 459 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:04,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 947 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:29:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24154 states. [2021-12-21 11:29:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24154 to 24154. [2021-12-21 11:29:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24154 states, 24153 states have (on average 1.0499316855049061) internal successors, (25359), 24153 states have internal predecessors, (25359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24154 states to 24154 states and 25359 transitions. [2021-12-21 11:29:05,167 INFO L78 Accepts]: Start accepts. Automaton has 24154 states and 25359 transitions. Word has length 794 [2021-12-21 11:29:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:05,167 INFO L470 AbstractCegarLoop]: Abstraction has 24154 states and 25359 transitions. [2021-12-21 11:29:05,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24154 states and 25359 transitions. [2021-12-21 11:29:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2021-12-21 11:29:05,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:05,180 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:05,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:29:05,180 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash -952642359, now seen corresponding path program 1 times [2021-12-21 11:29:05,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:05,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223676226] [2021-12-21 11:29:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:05,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 795 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-12-21 11:29:05,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223676226] [2021-12-21 11:29:05,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223676226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:05,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:05,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 11:29:05,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520962052] [2021-12-21 11:29:05,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:05,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:29:05,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:29:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:29:05,366 INFO L87 Difference]: Start difference. First operand 24154 states and 25359 transitions. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:07,038 INFO L93 Difference]: Finished difference Result 49081 states and 51502 transitions. [2021-12-21 11:29:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:29:07,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 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 799 [2021-12-21 11:29:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:07,065 INFO L225 Difference]: With dead ends: 49081 [2021-12-21 11:29:07,065 INFO L226 Difference]: Without dead ends: 24929 [2021-12-21 11:29:07,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:29:07,081 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 1048 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:07,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1637 Invalid, 2084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:29:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24929 states. [2021-12-21 11:29:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24929 to 24844. [2021-12-21 11:29:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.048625367306686) internal successors, (26051), 24843 states have internal predecessors, (26051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 26051 transitions. [2021-12-21 11:29:07,295 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 26051 transitions. Word has length 799 [2021-12-21 11:29:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 24844 states and 26051 transitions. [2021-12-21 11:29:07,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 26051 transitions. [2021-12-21 11:29:07,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-21 11:29:07,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:07,309 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:07,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:29:07,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -247999786, now seen corresponding path program 1 times [2021-12-21 11:29:07,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424162074] [2021-12-21 11:29:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:07,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 807 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-12-21 11:29:07,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:07,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424162074] [2021-12-21 11:29:07,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424162074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:07,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:07,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:07,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604957199] [2021-12-21 11:29:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:07,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:07,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:07,536 INFO L87 Difference]: Start difference. First operand 24844 states and 26051 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:09,183 INFO L93 Difference]: Finished difference Result 57966 states and 61012 transitions. [2021-12-21 11:29:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:09,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 811 [2021-12-21 11:29:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:09,220 INFO L225 Difference]: With dead ends: 57966 [2021-12-21 11:29:09,221 INFO L226 Difference]: Without dead ends: 33124 [2021-12-21 11:29:09,240 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 [2021-12-21 11:29:09,241 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 452 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:09,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 975 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:29:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2021-12-21 11:29:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 33124. [2021-12-21 11:29:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33124 states, 33123 states have (on average 1.0449536575793255) internal successors, (34612), 33123 states have internal predecessors, (34612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33124 states to 33124 states and 34612 transitions. [2021-12-21 11:29:09,671 INFO L78 Accepts]: Start accepts. Automaton has 33124 states and 34612 transitions. Word has length 811 [2021-12-21 11:29:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:09,672 INFO L470 AbstractCegarLoop]: Abstraction has 33124 states and 34612 transitions. [2021-12-21 11:29:09,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 33124 states and 34612 transitions. [2021-12-21 11:29:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-12-21 11:29:09,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:09,688 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:09,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:29:09,688 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -542285810, now seen corresponding path program 1 times [2021-12-21 11:29:09,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:09,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153945376] [2021-12-21 11:29:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:09,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 826 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-21 11:29:09,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153945376] [2021-12-21 11:29:09,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153945376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:09,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:09,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:09,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743717784] [2021-12-21 11:29:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:09,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:09,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:09,890 INFO L87 Difference]: Start difference. First operand 33124 states and 34612 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:11,542 INFO L93 Difference]: Finished difference Result 74526 states and 78124 transitions. [2021-12-21 11:29:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:11,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 830 [2021-12-21 11:29:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:11,582 INFO L225 Difference]: With dead ends: 74526 [2021-12-21 11:29:11,582 INFO L226 Difference]: Without dead ends: 41404 [2021-12-21 11:29:11,603 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 [2021-12-21 11:29:11,604 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 454 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:11,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 273 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:29:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-21 11:29:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 40714. [2021-12-21 11:29:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40714 states, 40713 states have (on average 1.0426890673740574) internal successors, (42451), 40713 states have internal predecessors, (42451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40714 states to 40714 states and 42451 transitions. [2021-12-21 11:29:12,057 INFO L78 Accepts]: Start accepts. Automaton has 40714 states and 42451 transitions. Word has length 830 [2021-12-21 11:29:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:12,057 INFO L470 AbstractCegarLoop]: Abstraction has 40714 states and 42451 transitions. [2021-12-21 11:29:12,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 40714 states and 42451 transitions. [2021-12-21 11:29:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1356 [2021-12-21 11:29:12,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:12,089 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:29:12,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:29:12,089 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1416554341, now seen corresponding path program 1 times [2021-12-21 11:29:12,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:12,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680498028] [2021-12-21 11:29:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:12,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 1396 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-21 11:29:12,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680498028] [2021-12-21 11:29:12,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680498028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:12,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:12,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:12,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096643794] [2021-12-21 11:29:12,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:12,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:29:12,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:12,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:29:12,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:29:12,849 INFO L87 Difference]: Start difference. First operand 40714 states and 42451 transitions. Second operand has 4 states, 4 states have (on average 205.5) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:15,101 INFO L93 Difference]: Finished difference Result 81426 states and 84914 transitions. [2021-12-21 11:29:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:29:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 205.5) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 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 1355 [2021-12-21 11:29:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:15,144 INFO L225 Difference]: With dead ends: 81426 [2021-12-21 11:29:15,144 INFO L226 Difference]: Without dead ends: 41404 [2021-12-21 11:29:15,166 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 [2021-12-21 11:29:15,170 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 977 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:15,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 68 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:29:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-21 11:29:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 40714. [2021-12-21 11:29:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40714 states, 40713 states have (on average 1.0425662564782747) internal successors, (42446), 40713 states have internal predecessors, (42446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40714 states to 40714 states and 42446 transitions. [2021-12-21 11:29:15,532 INFO L78 Accepts]: Start accepts. Automaton has 40714 states and 42446 transitions. Word has length 1355 [2021-12-21 11:29:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:15,533 INFO L470 AbstractCegarLoop]: Abstraction has 40714 states and 42446 transitions. [2021-12-21 11:29:15,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.5) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 40714 states and 42446 transitions. [2021-12-21 11:29:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1435 [2021-12-21 11:29:15,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:15,554 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-12-21 11:29:15,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:29:15,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2052476074, now seen corresponding path program 1 times [2021-12-21 11:29:15,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:15,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032766978] [2021-12-21 11:29:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:15,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2590 backedges. 609 proven. 24 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2021-12-21 11:29:16,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:16,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032766978] [2021-12-21 11:29:16,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032766978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:29:16,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880490408] [2021-12-21 11:29:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:16,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:29:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:29:16,015 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) [2021-12-21 11:29:16,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:29:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:16,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:29:16,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:29:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2590 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2021-12-21 11:29:18,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:29:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880490408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:18,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:29:18,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:29:18,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732826270] [2021-12-21 11:29:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:18,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:18,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:18,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:18,320 INFO L87 Difference]: Start difference. First operand 40714 states and 42446 transitions. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:19,861 INFO L93 Difference]: Finished difference Result 82806 states and 86415 transitions. [2021-12-21 11:29:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 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 1434 [2021-12-21 11:29:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:19,901 INFO L225 Difference]: With dead ends: 82806 [2021-12-21 11:29:19,901 INFO L226 Difference]: Without dead ends: 42094 [2021-12-21 11:29:19,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:19,923 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 627 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:19,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 958 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:29:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2021-12-21 11:29:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 42094. [2021-12-21 11:29:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42094 states, 42093 states have (on average 1.0434276483025682) internal successors, (43921), 42093 states have internal predecessors, (43921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 43921 transitions. [2021-12-21 11:29:20,264 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 43921 transitions. Word has length 1434 [2021-12-21 11:29:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:20,264 INFO L470 AbstractCegarLoop]: Abstraction has 42094 states and 43921 transitions. [2021-12-21 11:29:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 43921 transitions. [2021-12-21 11:29:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1443 [2021-12-21 11:29:20,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:20,289 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-12-21 11:29:20,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:29:20,503 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,SelfDestructingSolverStorable16 [2021-12-21 11:29:20,504 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1997839061, now seen corresponding path program 1 times [2021-12-21 11:29:20,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:20,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378155187] [2021-12-21 11:29:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:20,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 1203 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2021-12-21 11:29:20,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378155187] [2021-12-21 11:29:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378155187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:20,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:20,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:20,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287837168] [2021-12-21 11:29:20,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:20,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:20,903 INFO L87 Difference]: Start difference. First operand 42094 states and 43921 transitions. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:22,400 INFO L93 Difference]: Finished difference Result 83496 states and 87149 transitions. [2021-12-21 11:29:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 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 1442 [2021-12-21 11:29:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:22,440 INFO L225 Difference]: With dead ends: 83496 [2021-12-21 11:29:22,440 INFO L226 Difference]: Without dead ends: 42094 [2021-12-21 11:29:22,460 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 [2021-12-21 11:29:22,461 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 561 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:22,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 942 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:29:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2021-12-21 11:29:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 41404. [2021-12-21 11:29:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0349733111127213) internal successors, (42851), 41403 states have internal predecessors, (42851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 42851 transitions. [2021-12-21 11:29:22,926 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 42851 transitions. Word has length 1442 [2021-12-21 11:29:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:22,927 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 42851 transitions. [2021-12-21 11:29:22,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 42851 transitions. [2021-12-21 11:29:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2021-12-21 11:29:22,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:22,948 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 11:29:22,948 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1284688100, now seen corresponding path program 1 times [2021-12-21 11:29:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:22,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362582386] [2021-12-21 11:29:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:22,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 600 proven. 35 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2021-12-21 11:29:23,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362582386] [2021-12-21 11:29:23,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362582386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:29:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450412470] [2021-12-21 11:29:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:23,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:29:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:29:23,270 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) [2021-12-21 11:29:23,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:29:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:29:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:29:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 635 proven. 0 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2021-12-21 11:29:25,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:29:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450412470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:25,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:29:25,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:29:25,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928593984] [2021-12-21 11:29:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:25,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:25,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:25,066 INFO L87 Difference]: Start difference. First operand 41404 states and 42851 transitions. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:26,180 INFO L93 Difference]: Finished difference Result 84186 states and 87235 transitions. [2021-12-21 11:29:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 1469 [2021-12-21 11:29:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:26,218 INFO L225 Difference]: With dead ends: 84186 [2021-12-21 11:29:26,218 INFO L226 Difference]: Without dead ends: 43474 [2021-12-21 11:29:26,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1473 GetRequests, 1469 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:26,243 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 625 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 976 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:29:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43474 states. [2021-12-21 11:29:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43474 to 42094. [2021-12-21 11:29:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42094 states, 42093 states have (on average 1.0342812344095218) internal successors, (43536), 42093 states have internal predecessors, (43536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 43536 transitions. [2021-12-21 11:29:26,687 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 43536 transitions. Word has length 1469 [2021-12-21 11:29:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:26,688 INFO L470 AbstractCegarLoop]: Abstraction has 42094 states and 43536 transitions. [2021-12-21 11:29:26,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 43536 transitions. [2021-12-21 11:29:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1473 [2021-12-21 11:29:26,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:26,711 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:26,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:29:26,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:29:26,930 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2001033105, now seen corresponding path program 1 times [2021-12-21 11:29:26,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:26,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641765262] [2021-12-21 11:29:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:26,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 498 proven. 35 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2021-12-21 11:29:27,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:27,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641765262] [2021-12-21 11:29:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641765262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:29:27,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273328188] [2021-12-21 11:29:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:27,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:29:27,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:29:27,354 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) [2021-12-21 11:29:27,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:29:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 11:29:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:29:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2338 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2021-12-21 11:29:29,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:29:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273328188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:29,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:29:29,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:29:29,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227592079] [2021-12-21 11:29:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:29,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:29,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:29,089 INFO L87 Difference]: Start difference. First operand 42094 states and 43536 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:30,185 INFO L93 Difference]: Finished difference Result 85566 states and 88561 transitions. [2021-12-21 11:29:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1472 [2021-12-21 11:29:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:30,225 INFO L225 Difference]: With dead ends: 85566 [2021-12-21 11:29:30,226 INFO L226 Difference]: Without dead ends: 43474 [2021-12-21 11:29:30,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1476 GetRequests, 1472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:29:30,249 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 627 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:30,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 922 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:29:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43474 states. [2021-12-21 11:29:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43474 to 42784. [2021-12-21 11:29:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42784 states, 42783 states have (on average 1.034663300843793) internal successors, (44266), 42783 states have internal predecessors, (44266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42784 states to 42784 states and 44266 transitions. [2021-12-21 11:29:30,772 INFO L78 Accepts]: Start accepts. Automaton has 42784 states and 44266 transitions. Word has length 1472 [2021-12-21 11:29:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:30,773 INFO L470 AbstractCegarLoop]: Abstraction has 42784 states and 44266 transitions. [2021-12-21 11:29:30,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42784 states and 44266 transitions. [2021-12-21 11:29:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2021-12-21 11:29:30,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:30,796 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:30,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 11:29:30,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:29:31,000 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1867417362, now seen corresponding path program 1 times [2021-12-21 11:29:31,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:31,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567464928] [2021-12-21 11:29:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:31,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2155 backedges. 1519 proven. 0 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2021-12-21 11:29:31,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567464928] [2021-12-21 11:29:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567464928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:31,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19578371] [2021-12-21 11:29:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:31,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:31,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:31,420 INFO L87 Difference]: Start difference. First operand 42784 states and 44266 transitions. Second operand has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:33,321 INFO L93 Difference]: Finished difference Result 109716 states and 113777 transitions. [2021-12-21 11:29:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 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 1478 [2021-12-21 11:29:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:33,386 INFO L225 Difference]: With dead ends: 109716 [2021-12-21 11:29:33,386 INFO L226 Difference]: Without dead ends: 67624 [2021-12-21 11:29:33,414 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 [2021-12-21 11:29:33,415 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 617 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:33,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 218 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:29:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67624 states. [2021-12-21 11:29:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67624 to 67624. [2021-12-21 11:29:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67624 states, 67623 states have (on average 1.0317051890628928) internal successors, (69767), 67623 states have internal predecessors, (69767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67624 states to 67624 states and 69767 transitions. [2021-12-21 11:29:34,196 INFO L78 Accepts]: Start accepts. Automaton has 67624 states and 69767 transitions. Word has length 1478 [2021-12-21 11:29:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:34,197 INFO L470 AbstractCegarLoop]: Abstraction has 67624 states and 69767 transitions. [2021-12-21 11:29:34,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 67624 states and 69767 transitions. [2021-12-21 11:29:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1545 [2021-12-21 11:29:34,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:34,220 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:34,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 11:29:34,220 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:34,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1007233236, now seen corresponding path program 1 times [2021-12-21 11:29:34,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:34,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939290792] [2021-12-21 11:29:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:34,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3245 backedges. 1930 proven. 0 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked. [2021-12-21 11:29:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939290792] [2021-12-21 11:29:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939290792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:34,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:34,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:34,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535585012] [2021-12-21 11:29:34,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:34,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:34,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:34,757 INFO L87 Difference]: Start difference. First operand 67624 states and 69767 transitions. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:36,439 INFO L93 Difference]: Finished difference Result 142836 states and 147240 transitions. [2021-12-21 11:29:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 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 1544 [2021-12-21 11:29:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:36,512 INFO L225 Difference]: With dead ends: 142836 [2021-12-21 11:29:36,513 INFO L226 Difference]: Without dead ends: 75904 [2021-12-21 11:29:36,543 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 [2021-12-21 11:29:36,544 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 631 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:36,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 982 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:29:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75904 states. [2021-12-21 11:29:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75904 to 71074. [2021-12-21 11:29:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71074 states, 71073 states have (on average 1.0310244396606305) internal successors, (73278), 71073 states have internal predecessors, (73278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71074 states to 71074 states and 73278 transitions. [2021-12-21 11:29:37,451 INFO L78 Accepts]: Start accepts. Automaton has 71074 states and 73278 transitions. Word has length 1544 [2021-12-21 11:29:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:37,453 INFO L470 AbstractCegarLoop]: Abstraction has 71074 states and 73278 transitions. [2021-12-21 11:29:37,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 71074 states and 73278 transitions. [2021-12-21 11:29:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1639 [2021-12-21 11:29:37,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:37,479 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:37,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 11:29:37,479 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1332193786, now seen corresponding path program 1 times [2021-12-21 11:29:37,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:37,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893048747] [2021-12-21 11:29:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:37,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:29:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2963 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 2719 trivial. 0 not checked. [2021-12-21 11:29:38,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:29:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893048747] [2021-12-21 11:29:38,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893048747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:29:38,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:29:38,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:29:38,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690574541] [2021-12-21 11:29:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:29:38,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:29:38,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:29:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:29:38,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:29:38,062 INFO L87 Difference]: Start difference. First operand 71074 states and 73278 transitions. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:29:40,019 INFO L93 Difference]: Finished difference Result 160776 states and 166157 transitions. [2021-12-21 11:29:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:29:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 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 1638 [2021-12-21 11:29:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:29:40,109 INFO L225 Difference]: With dead ends: 160776 [2021-12-21 11:29:40,109 INFO L226 Difference]: Without dead ends: 90394 [2021-12-21 11:29:40,142 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 [2021-12-21 11:29:40,142 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 677 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:29:40,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 949 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:29:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90394 states. [2021-12-21 11:29:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90394 to 90394. [2021-12-21 11:29:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90394 states, 90393 states have (on average 1.0301793280453133) internal successors, (93121), 90393 states have internal predecessors, (93121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90394 states to 90394 states and 93121 transitions. [2021-12-21 11:29:41,263 INFO L78 Accepts]: Start accepts. Automaton has 90394 states and 93121 transitions. Word has length 1638 [2021-12-21 11:29:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:29:41,265 INFO L470 AbstractCegarLoop]: Abstraction has 90394 states and 93121 transitions. [2021-12-21 11:29:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:29:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 90394 states and 93121 transitions. [2021-12-21 11:29:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1780 [2021-12-21 11:29:41,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:29:41,321 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:29:41,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 11:29:41,321 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:29:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:29:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1003587738, now seen corresponding path program 1 times [2021-12-21 11:29:41,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:29:41,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699402004] [2021-12-21 11:29:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:29:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:29:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat