./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem19_label06.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 53a9af5a268dc84f7a36a641b11f05ea6b6b73a310013118c273a3cd9faef91e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:08:16,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:08:16,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:08:16,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:08:16,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:08:16,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:08:16,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:08:16,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:08:16,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:08:16,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:08:16,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:08:16,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:08:16,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:08:16,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:08:16,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:08:16,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:08:16,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:08:16,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:08:16,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:08:16,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:08:16,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:08:16,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:08:16,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:08:16,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:08:16,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:08:16,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:08:16,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:08:16,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:08:16,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:08:16,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:08:16,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:08:16,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:08:16,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:08:16,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:08:16,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:08:16,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:08:16,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:08:16,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:08:16,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:08:16,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:08:16,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:08:16,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:08:16,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:08:16,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:08:16,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:08:16,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:08:16,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:08:16,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:08:16,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:08:16,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:08:16,598 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:08:16,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:08:16,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:08:16,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:08:16,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:08:16,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:08:16,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:08:16,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:08:16,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:08:16,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:08:16,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:08:16,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:08:16,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:08:16,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:08:16,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:08:16,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:08:16,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:08:16,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:08:16,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:08:16,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:08:16,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53a9af5a268dc84f7a36a641b11f05ea6b6b73a310013118c273a3cd9faef91e [2021-12-15 23:08:16,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:08:16,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:08:16,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:08:16,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:08:16,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:08:16,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2021-12-15 23:08:16,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ccc1863/43b7a9a65e9c405f8aabda5e13131ea3/FLAG1581e23a4 [2021-12-15 23:08:17,495 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:08:17,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2021-12-15 23:08:17,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ccc1863/43b7a9a65e9c405f8aabda5e13131ea3/FLAG1581e23a4 [2021-12-15 23:08:17,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ccc1863/43b7a9a65e9c405f8aabda5e13131ea3 [2021-12-15 23:08:17,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:08:17,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:08:17,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:08:17,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:08:17,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:08:17,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:08:17" (1/1) ... [2021-12-15 23:08:17,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@942c653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:17, skipping insertion in model container [2021-12-15 23:08:17,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:08:17" (1/1) ... [2021-12-15 23:08:17,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:08:17,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:08:17,988 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/Problem19_label06.c[7097,7110] [2021-12-15 23:08:18,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:08:18,753 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:08:18,781 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/Problem19_label06.c[7097,7110] [2021-12-15 23:08:19,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:08:19,376 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:08:19,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19 WrapperNode [2021-12-15 23:08:19,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:08:19,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:08:19,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:08:19,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:08:19,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:19,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,158 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 23:08:20,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:08:20,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:08:20,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:08:20,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:08:20,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:20,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:21,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:21,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:08:21,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:08:21,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:08:21,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:08:21,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (1/1) ... [2021-12-15 23:08:21,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:08:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:08:21,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:08:21,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:08:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:08:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:08:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:08:21,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:08:21,274 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:08:21,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:08:26,805 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:08:26,818 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:08:26,819 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:08:26,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:08:26 BoogieIcfgContainer [2021-12-15 23:08:26,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:08:26,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:08:26,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:08:26,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:08:26,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:08:17" (1/3) ... [2021-12-15 23:08:26,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137e09a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:08:26, skipping insertion in model container [2021-12-15 23:08:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:08:19" (2/3) ... [2021-12-15 23:08:26,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137e09a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:08:26, skipping insertion in model container [2021-12-15 23:08:26,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:08:26" (3/3) ... [2021-12-15 23:08:26,827 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label06.c [2021-12-15 23:08:26,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:08:26,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:08:26,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:08:26,867 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:08:26,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:08:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 23:08:26,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:08:26,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:08:26,907 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:08:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:08:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-12-15 23:08:26,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:08:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512538576] [2021-12-15 23:08:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:26,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:08:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:08:27,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:08:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512538576] [2021-12-15 23:08:27,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512538576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:08:27,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:08:27,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:08:27,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146052776] [2021-12-15 23:08:27,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:08:27,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:08:27,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:08:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:08:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:08:27,191 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:08:33,581 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-15 23:08:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:08:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 23:08:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:08:33,640 INFO L225 Difference]: With dead ends: 4957 [2021-12-15 23:08:33,644 INFO L226 Difference]: Without dead ends: 3129 [2021-12-15 23:08:33,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:08:33,659 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1572 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:08:33,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-15 23:08:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-15 23:08:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-15 23:08:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-15 23:08:33,901 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 54 [2021-12-15 23:08:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:08:33,909 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-15 23:08:33,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-15 23:08:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 23:08:33,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:08:33,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:08:33,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:08:33,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:08:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:08:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1087394992, now seen corresponding path program 1 times [2021-12-15 23:08:33,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:08:33,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984805800] [2021-12-15 23:08:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:33,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:08:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:08:34,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:08:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984805800] [2021-12-15 23:08:34,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984805800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:08:34,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:08:34,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:08:34,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349988116] [2021-12-15 23:08:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:08:34,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:08:34,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:08:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:08:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:08:34,073 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:08:39,669 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-15 23:08:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:08:39,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-15 23:08:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:08:39,688 INFO L225 Difference]: With dead ends: 9153 [2021-12-15 23:08:39,688 INFO L226 Difference]: Without dead ends: 6047 [2021-12-15 23:08:39,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:08:39,694 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:08:39,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 23:08:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-15 23:08:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-15 23:08:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-15 23:08:39,786 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 121 [2021-12-15 23:08:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:08:39,786 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-15 23:08:39,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-15 23:08:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-15 23:08:39,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:08:39,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:08:39,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:08:39,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:08:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:08:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash 209014020, now seen corresponding path program 1 times [2021-12-15 23:08:39,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:08:39,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434474803] [2021-12-15 23:08:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:39,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:08:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:08:39,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:08:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434474803] [2021-12-15 23:08:39,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434474803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:08:39,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:08:39,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:08:39,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39968424] [2021-12-15 23:08:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:08:39,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:08:39,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:08:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:08:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:08:39,906 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:08:48,282 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-15 23:08:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:08:48,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-12-15 23:08:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:08:48,327 INFO L225 Difference]: With dead ends: 19026 [2021-12-15 23:08:48,327 INFO L226 Difference]: Without dead ends: 12997 [2021-12-15 23:08:48,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:08:48,365 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4260 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 10840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:08:48,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 1207 Invalid, 10840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-12-15 23:08:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-15 23:08:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-15 23:08:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.346243222308288) internal successors, (17380), 12910 states have internal predecessors, (17380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2021-12-15 23:08:48,568 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 123 [2021-12-15 23:08:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:08:48,569 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2021-12-15 23:08:48,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2021-12-15 23:08:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-15 23:08:48,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:08:48,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:08:48,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:08:48,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:08:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:08:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1075594101, now seen corresponding path program 1 times [2021-12-15 23:08:48,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:08:48,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117094914] [2021-12-15 23:08:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:48,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:08:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 23:08:48,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:08:48,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117094914] [2021-12-15 23:08:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117094914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:08:48,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:08:48,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:08:48,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867508108] [2021-12-15 23:08:48,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:08:48,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:08:48,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:08:48,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:08:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:08:48,796 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:08:54,151 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2021-12-15 23:08:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:08:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 358 [2021-12-15 23:08:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:08:54,177 INFO L225 Difference]: With dead ends: 24486 [2021-12-15 23:08:54,178 INFO L226 Difference]: Without dead ends: 12911 [2021-12-15 23:08:54,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:08:54,188 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:08:54,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-15 23:08:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-15 23:08:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-15 23:08:54,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3455460883036405) internal successors, (17371), 12910 states have internal predecessors, (17371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2021-12-15 23:08:54,337 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 358 [2021-12-15 23:08:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:08:54,338 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2021-12-15 23:08:54,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:08:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2021-12-15 23:08:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-12-15 23:08:54,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:08:54,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:08:54,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:08:54,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:08:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:08:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1479156116, now seen corresponding path program 1 times [2021-12-15 23:08:54,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:08:54,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926695303] [2021-12-15 23:08:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:54,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:08:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 23:08:54,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:08:54,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926695303] [2021-12-15 23:08:54,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926695303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:08:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600708800] [2021-12-15 23:08:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:08:54,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:08:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:08:54,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:08:54,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:08:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:08:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:08:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:08:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:08:55,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:08:55,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600708800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:08:55,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:08:55,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 23:08:55,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580671542] [2021-12-15 23:08:55,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:08:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:08:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:08:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:08:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:08:55,364 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:01,320 INFO L93 Difference]: Finished difference Result 30050 states and 41077 transitions. [2021-12-15 23:09:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 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 532 [2021-12-15 23:09:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:01,351 INFO L225 Difference]: With dead ends: 30050 [2021-12-15 23:09:01,353 INFO L226 Difference]: Without dead ends: 18506 [2021-12-15 23:09:01,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:09:01,365 INFO L933 BasicCegarLoop]: 3047 mSDtfsCounter, 1430 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4993 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 3222 SdHoareTripleChecker+Invalid, 5919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 4993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:01,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1430 Valid, 3222 Invalid, 5919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 4993 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-15 23:09:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18506 states. [2021-12-15 23:09:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18506 to 18422. [2021-12-15 23:09:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18422 states, 18421 states have (on average 1.2895065414472613) internal successors, (23754), 18421 states have internal predecessors, (23754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18422 states to 18422 states and 23754 transitions. [2021-12-15 23:09:01,565 INFO L78 Accepts]: Start accepts. Automaton has 18422 states and 23754 transitions. Word has length 532 [2021-12-15 23:09:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:01,566 INFO L470 AbstractCegarLoop]: Abstraction has 18422 states and 23754 transitions. [2021-12-15 23:09:01,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18422 states and 23754 transitions. [2021-12-15 23:09:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-12-15 23:09:01,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:01,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:09:01,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 23:09:01,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:09:01,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:01,808 INFO L85 PathProgramCache]: Analyzing trace with hash -981420452, now seen corresponding path program 1 times [2021-12-15 23:09:01,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:01,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991761478] [2021-12-15 23:09:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:01,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 23:09:02,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991761478] [2021-12-15 23:09:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991761478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:09:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349968598] [2021-12-15 23:09:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:09:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:09:02,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:09:02,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:09:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:09:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:09:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:02,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:09:02,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349968598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:02,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:09:02,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 23:09:02,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904171910] [2021-12-15 23:09:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:02,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:02,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:09:02,823 INFO L87 Difference]: Start difference. First operand 18422 states and 23754 transitions. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:08,355 INFO L93 Difference]: Finished difference Result 35563 states and 46298 transitions. [2021-12-15 23:09:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2021-12-15 23:09:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:08,383 INFO L225 Difference]: With dead ends: 35563 [2021-12-15 23:09:08,384 INFO L226 Difference]: Without dead ends: 18508 [2021-12-15 23:09:08,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:09:08,402 INFO L933 BasicCegarLoop]: 3131 mSDtfsCounter, 1482 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 5756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:08,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 3310 Invalid, 5756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 4205 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 23:09:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18508 states. [2021-12-15 23:09:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18508 to 18429. [2021-12-15 23:09:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18429 states, 18428 states have (on average 1.2183090948556545) internal successors, (22451), 18428 states have internal predecessors, (22451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18429 states to 18429 states and 22451 transitions. [2021-12-15 23:09:08,609 INFO L78 Accepts]: Start accepts. Automaton has 18429 states and 22451 transitions. Word has length 541 [2021-12-15 23:09:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:08,609 INFO L470 AbstractCegarLoop]: Abstraction has 18429 states and 22451 transitions. [2021-12-15 23:09:08,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18429 states and 22451 transitions. [2021-12-15 23:09:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2021-12-15 23:09:08,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:08,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:09:08,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:09:08,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 23:09:08,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2107846024, now seen corresponding path program 1 times [2021-12-15 23:09:08,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:08,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645036885] [2021-12-15 23:09:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:08,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-15 23:09:09,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:09,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645036885] [2021-12-15 23:09:09,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645036885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:09,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:09,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:09:09,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778049168] [2021-12-15 23:09:09,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:09,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:09,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:09,028 INFO L87 Difference]: Start difference. First operand 18429 states and 22451 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:15,089 INFO L93 Difference]: Finished difference Result 52092 states and 63989 transitions. [2021-12-15 23:09:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:15,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 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 600 [2021-12-15 23:09:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:15,162 INFO L225 Difference]: With dead ends: 52092 [2021-12-15 23:09:15,162 INFO L226 Difference]: Without dead ends: 35030 [2021-12-15 23:09:15,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:15,173 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 2123 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 5119 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 5553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2123 Valid, 996 Invalid, 5553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5119 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-15 23:09:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35030 states. [2021-12-15 23:09:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35030 to 35027. [2021-12-15 23:09:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35027 states, 35026 states have (on average 1.1937132415919602) internal successors, (41811), 35026 states have internal predecessors, (41811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35027 states to 35027 states and 41811 transitions. [2021-12-15 23:09:15,462 INFO L78 Accepts]: Start accepts. Automaton has 35027 states and 41811 transitions. Word has length 600 [2021-12-15 23:09:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:15,464 INFO L470 AbstractCegarLoop]: Abstraction has 35027 states and 41811 transitions. [2021-12-15 23:09:15,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35027 states and 41811 transitions. [2021-12-15 23:09:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-12-15 23:09:15,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:15,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:09:15,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:09:15,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 187883775, now seen corresponding path program 1 times [2021-12-15 23:09:15,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:15,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947614016] [2021-12-15 23:09:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:15,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-15 23:09:15,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947614016] [2021-12-15 23:09:15,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947614016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:15,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:15,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:09:15,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9815961] [2021-12-15 23:09:15,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:15,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:15,706 INFO L87 Difference]: Start difference. First operand 35027 states and 41811 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:20,962 INFO L93 Difference]: Finished difference Result 98736 states and 118741 transitions. [2021-12-15 23:09:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:20,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 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 692 [2021-12-15 23:09:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:21,083 INFO L225 Difference]: With dead ends: 98736 [2021-12-15 23:09:21,083 INFO L226 Difference]: Without dead ends: 65076 [2021-12-15 23:09:21,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:21,149 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 1293 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 3961 mSolverCounterSat, 2031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 5992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2031 IncrementalHoareTripleChecker+Valid, 3961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:21,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 1212 Invalid, 5992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2031 Valid, 3961 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-15 23:09:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65076 states. [2021-12-15 23:09:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65076 to 65058. [2021-12-15 23:09:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65058 states, 65057 states have (on average 1.1832085709454785) internal successors, (76976), 65057 states have internal predecessors, (76976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65058 states to 65058 states and 76976 transitions. [2021-12-15 23:09:21,801 INFO L78 Accepts]: Start accepts. Automaton has 65058 states and 76976 transitions. Word has length 692 [2021-12-15 23:09:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 65058 states and 76976 transitions. [2021-12-15 23:09:21,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:09:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 65058 states and 76976 transitions. [2021-12-15 23:09:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-12-15 23:09:21,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:21,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:09:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:09:21,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash 435116884, now seen corresponding path program 1 times [2021-12-15 23:09:21,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:21,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402839690] [2021-12-15 23:09:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:21,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-15 23:09:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402839690] [2021-12-15 23:09:21,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402839690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:21,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:21,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:09:21,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209835553] [2021-12-15 23:09:21,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:21,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:21,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:21,994 INFO L87 Difference]: Start difference. First operand 65058 states and 76976 transitions. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)