./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label14.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 0ac429ca8e99b6512d8aadb8f8e502aadaca92db9137fa23838c552f61d5f382 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:59:59,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:59:59,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:59:59,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:59:59,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:59:59,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:59:59,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:59:59,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:59:59,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:59:59,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:59:59,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:59:59,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:59:59,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:59:59,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:59:59,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:59:59,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:59:59,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:59:59,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:59:59,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:59:59,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:59:59,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:59:59,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:59:59,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:59:59,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:59:59,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:59:59,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:59:59,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:59:59,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:59:59,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:59:59,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:59:59,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:59:59,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:59:59,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:59:59,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:59:59,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:59:59,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:59:59,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:59:59,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:59:59,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:59:59,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:59:59,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:59:59,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:59:59,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:59:59,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:59:59,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:59:59,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:59:59,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:59:59,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:59:59,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:59:59,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:59:59,456 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:59:59,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:59:59,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:59:59,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:59:59,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:59:59,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:59:59,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:59:59,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:59:59,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:59:59,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:59:59,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:59:59,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:59:59,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:59:59,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:59:59,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:59:59,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:59:59,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:59,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:59:59,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:59:59,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:59:59,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:59:59,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:59:59,461 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:59:59,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:59:59,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:59:59,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:59:59,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ac429ca8e99b6512d8aadb8f8e502aadaca92db9137fa23838c552f61d5f382 [2021-12-15 22:59:59,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:59:59,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:59:59,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:59:59,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:59:59,705 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:59:59,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label14.c [2021-12-15 22:59:59,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1cef45/edee18d743ac454cb31cea9f57276668/FLAGc27e5e8c5 [2021-12-15 23:00:00,390 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:00:00,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label14.c [2021-12-15 23:00:00,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1cef45/edee18d743ac454cb31cea9f57276668/FLAGc27e5e8c5 [2021-12-15 23:00:00,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1cef45/edee18d743ac454cb31cea9f57276668 [2021-12-15 23:00:00,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:00:00,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:00:00,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:00:00,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:00:00,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:00:00,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:00" (1/1) ... [2021-12-15 23:00:00,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55feec0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:00, skipping insertion in model container [2021-12-15 23:00:00,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:00:00" (1/1) ... [2021-12-15 23:00:00,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:00:00,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:00:01,132 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label14.c[6990,7003] [2021-12-15 23:00:01,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:00:01,561 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:00:01,581 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label14.c[6990,7003] [2021-12-15 23:00:01,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:00:01,840 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:00:01,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01 WrapperNode [2021-12-15 23:00:01,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:00:01,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:00:01,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:00:01,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:00:01,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:01,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,171 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 23:00:02,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:00:02,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:00:02,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:00:02,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:00:02,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:00:02,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:00:02,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:00:02,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:00:02,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (1/1) ... [2021-12-15 23:00:02,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:00:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:02,713 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 23:00:02,754 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 23:00:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:00:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:00:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:00:02,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:00:02,828 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:00:02,829 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:00:05,608 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:00:05,617 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:00:05,618 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:00:05,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:00:05 BoogieIcfgContainer [2021-12-15 23:00:05,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:00:05,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:00:05,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:00:05,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:00:05,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:00:00" (1/3) ... [2021-12-15 23:00:05,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfc36a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:00:05, skipping insertion in model container [2021-12-15 23:00:05,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:00:01" (2/3) ... [2021-12-15 23:00:05,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfc36a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:00:05, skipping insertion in model container [2021-12-15 23:00:05,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:00:05" (3/3) ... [2021-12-15 23:00:05,627 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label14.c [2021-12-15 23:00:05,631 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:00:05,631 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:00:05,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:00:05,674 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 23:00:05,674 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:00:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 23:00:05,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:05,703 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] [2021-12-15 23:00:05,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2021-12-15 23:00:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:05,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576465055] [2021-12-15 23:00:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:05,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:05,991 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 23:00:05,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:05,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576465055] [2021-12-15 23:00:05,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576465055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:05,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:05,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:00:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636186795] [2021-12-15 23:00:05,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:05,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:05,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:06,031 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 23:00:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:08,776 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-15 23:00:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:08,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-15 23:00:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:08,807 INFO L225 Difference]: With dead ends: 1667 [2021-12-15 23:00:08,807 INFO L226 Difference]: Without dead ends: 998 [2021-12-15 23:00:08,813 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 23:00:08,816 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 498 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:08,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 23:00:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-15 23:00:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-15 23:00:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-15 23:00:08,909 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 47 [2021-12-15 23:00:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:08,910 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-15 23:00:08,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 23:00:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-15 23:00:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 23:00:08,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:08,914 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, 1, 1, 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 23:00:08,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:00:08,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2083214859, now seen corresponding path program 1 times [2021-12-15 23:00:08,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:08,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518075457] [2021-12-15 23:00:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:08,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:09,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518075457] [2021-12-15 23:00:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518075457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:09,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:09,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:00:09,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052854940] [2021-12-15 23:00:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:09,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:09,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:09,021 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 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 23:00:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:11,142 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-12-15 23:00:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-12-15 23:00:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:11,152 INFO L225 Difference]: With dead ends: 2841 [2021-12-15 23:00:11,152 INFO L226 Difference]: Without dead ends: 1861 [2021-12-15 23:00:11,157 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 23:00:11,159 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 23:00:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-15 23:00:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-12-15 23:00:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 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 23:00:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-12-15 23:00:11,197 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 112 [2021-12-15 23:00:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:11,200 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-12-15 23:00:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 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 23:00:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-12-15 23:00:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-15 23:00:11,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:11,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:11,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:00:11,215 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1155338080, now seen corresponding path program 1 times [2021-12-15 23:00:11,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:11,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192441296] [2021-12-15 23:00:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:11,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:11,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:11,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192441296] [2021-12-15 23:00:11,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192441296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:11,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:11,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:00:11,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927304762] [2021-12-15 23:00:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:11,399 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 23:00:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:13,744 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-12-15 23:00:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-15 23:00:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:13,754 INFO L225 Difference]: With dead ends: 4591 [2021-12-15 23:00:13,755 INFO L226 Difference]: Without dead ends: 2736 [2021-12-15 23:00:13,757 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 23:00:13,764 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:13,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:00:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-15 23:00:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-12-15 23:00:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 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 23:00:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-12-15 23:00:13,810 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 152 [2021-12-15 23:00:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:13,812 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-12-15 23:00:13,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 23:00:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-12-15 23:00:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-15 23:00:13,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:13,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:13,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:00:13,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2121161297, now seen corresponding path program 1 times [2021-12-15 23:00:13,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:13,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587329529] [2021-12-15 23:00:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:13,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587329529] [2021-12-15 23:00:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587329529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:14,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:14,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:14,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628037468] [2021-12-15 23:00:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:14,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:14,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:14,018 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 23:00:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:16,034 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-12-15 23:00:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:00:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-15 23:00:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:16,043 INFO L225 Difference]: With dead ends: 5012 [2021-12-15 23:00:16,043 INFO L226 Difference]: Without dead ends: 2298 [2021-12-15 23:00:16,045 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 23:00:16,046 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:16,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:00:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-12-15 23:00:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-12-15 23:00:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 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 23:00:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-12-15 23:00:16,082 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 158 [2021-12-15 23:00:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:16,083 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-12-15 23:00:16,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 23:00:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-12-15 23:00:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-15 23:00:16,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:16,085 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, 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] [2021-12-15 23:00:16,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:00:16,085 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -832731998, now seen corresponding path program 1 times [2021-12-15 23:00:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140892642] [2021-12-15 23:00:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:16,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 89 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 23:00:16,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140892642] [2021-12-15 23:00:16,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140892642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751238051] [2021-12-15 23:00:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:16,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:16,187 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 23:00:16,224 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 23:00:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:00:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 23:00:16,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:00:16,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751238051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:16,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:00:16,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 23:00:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781043963] [2021-12-15 23:00:16,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:16,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:16,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:16,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:16,662 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:00:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:18,545 INFO L93 Difference]: Finished difference Result 5850 states and 8323 transitions. [2021-12-15 23:00:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 182 [2021-12-15 23:00:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:18,591 INFO L225 Difference]: With dead ends: 5850 [2021-12-15 23:00:18,593 INFO L226 Difference]: Without dead ends: 3995 [2021-12-15 23:00:18,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:18,597 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:18,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:00:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-12-15 23:00:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-12-15 23:00:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 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 23:00:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-12-15 23:00:18,661 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 182 [2021-12-15 23:00:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:18,666 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-12-15 23:00:18,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 23:00:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-12-15 23:00:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 23:00:18,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:18,669 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:18,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:00:18,883 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 23:00:18,883 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -878840060, now seen corresponding path program 1 times [2021-12-15 23:00:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932445699] [2021-12-15 23:00:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:18,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:18,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932445699] [2021-12-15 23:00:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932445699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:18,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:18,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 23:00:18,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426951573] [2021-12-15 23:00:18,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:19,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:00:19,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:00:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:00:19,001 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 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 23:00:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:21,413 INFO L93 Difference]: Finished difference Result 8024 states and 10527 transitions. [2021-12-15 23:00:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:00:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2021-12-15 23:00:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:21,429 INFO L225 Difference]: With dead ends: 8024 [2021-12-15 23:00:21,429 INFO L226 Difference]: Without dead ends: 4884 [2021-12-15 23:00:21,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:21,434 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1127 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 1099 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1099 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:21,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 870 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1099 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 23:00:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-12-15 23:00:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4852. [2021-12-15 23:00:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 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 23:00:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-12-15 23:00:21,547 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 195 [2021-12-15 23:00:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:21,548 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-12-15 23:00:21,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 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 23:00:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-12-15 23:00:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-15 23:00:21,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:21,551 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 23:00:21,551 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 814886771, now seen corresponding path program 1 times [2021-12-15 23:00:21,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087855002] [2021-12-15 23:00:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:21,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 23:00:21,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087855002] [2021-12-15 23:00:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087855002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:21,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:21,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:21,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346295119] [2021-12-15 23:00:21,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:21,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:21,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:21,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:21,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:21,651 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 23:00:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:23,522 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-12-15 23:00:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 201 [2021-12-15 23:00:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:23,547 INFO L225 Difference]: With dead ends: 12249 [2021-12-15 23:00:23,547 INFO L226 Difference]: Without dead ends: 7399 [2021-12-15 23:00:23,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:23,555 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 401 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:23,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 23:00:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-12-15 23:00:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-12-15 23:00:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 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 23:00:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-12-15 23:00:23,651 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 201 [2021-12-15 23:00:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:23,651 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-12-15 23:00:23,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 23:00:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-12-15 23:00:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-15 23:00:23,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:23,654 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:23,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:00:23,655 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1562743007, now seen corresponding path program 1 times [2021-12-15 23:00:23,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:23,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535146445] [2021-12-15 23:00:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:23,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 75 proven. 14 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:23,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535146445] [2021-12-15 23:00:23,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535146445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410267498] [2021-12-15 23:00:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:23,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:23,792 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 23:00:23,827 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 23:00:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:00:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:24,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:00:24,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410267498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:24,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:00:24,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 23:00:24,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473376087] [2021-12-15 23:00:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:24,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:24,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:24,276 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 23:00:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:26,229 INFO L93 Difference]: Finished difference Result 13486 states and 17137 transitions. [2021-12-15 23:00:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 214 [2021-12-15 23:00:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:26,249 INFO L225 Difference]: With dead ends: 13486 [2021-12-15 23:00:26,249 INFO L226 Difference]: Without dead ends: 7355 [2021-12-15 23:00:26,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:26,257 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 546 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:26,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 635 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 23:00:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2021-12-15 23:00:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 6499. [2021-12-15 23:00:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6498 states have (on average 1.1871345029239766) internal successors, (7714), 6498 states have internal predecessors, (7714), 0 states have call successors, (0), 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 23:00:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 7714 transitions. [2021-12-15 23:00:26,349 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 7714 transitions. Word has length 214 [2021-12-15 23:00:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:26,349 INFO L470 AbstractCegarLoop]: Abstraction has 6499 states and 7714 transitions. [2021-12-15 23:00:26,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 23:00:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 7714 transitions. [2021-12-15 23:00:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-15 23:00:26,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:26,356 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 23:00:26,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 23:00:26,570 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,SelfDestructingSolverStorable7 [2021-12-15 23:00:26,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash 706596333, now seen corresponding path program 1 times [2021-12-15 23:00:26,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:26,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257336891] [2021-12-15 23:00:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:26,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:26,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257336891] [2021-12-15 23:00:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257336891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:26,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:26,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:26,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334030859] [2021-12-15 23:00:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:26,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:26,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:26,672 INFO L87 Difference]: Start difference. First operand 6499 states and 7714 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 23:00:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:28,307 INFO L93 Difference]: Finished difference Result 16838 states and 20158 transitions. [2021-12-15 23:00:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:28,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 267 [2021-12-15 23:00:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:28,323 INFO L225 Difference]: With dead ends: 16838 [2021-12-15 23:00:28,323 INFO L226 Difference]: Without dead ends: 10341 [2021-12-15 23:00:28,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:28,331 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 442 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:28,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 326 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 23:00:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-12-15 23:00:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9484. [2021-12-15 23:00:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9484 states, 9483 states have (on average 1.1981440472424338) internal successors, (11362), 9483 states have internal predecessors, (11362), 0 states have call successors, (0), 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 23:00:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9484 states to 9484 states and 11362 transitions. [2021-12-15 23:00:28,456 INFO L78 Accepts]: Start accepts. Automaton has 9484 states and 11362 transitions. Word has length 267 [2021-12-15 23:00:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:28,456 INFO L470 AbstractCegarLoop]: Abstraction has 9484 states and 11362 transitions. [2021-12-15 23:00:28,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 23:00:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9484 states and 11362 transitions. [2021-12-15 23:00:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-15 23:00:28,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:28,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:00:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 23:00:28,463 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -456337817, now seen corresponding path program 1 times [2021-12-15 23:00:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474428996] [2021-12-15 23:00:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:28,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 23:00:28,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474428996] [2021-12-15 23:00:28,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474428996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:28,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:28,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:00:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179429525] [2021-12-15 23:00:28,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:28,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:28,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:28,595 INFO L87 Difference]: Start difference. First operand 9484 states and 11362 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:31,240 INFO L93 Difference]: Finished difference Result 31365 states and 37439 transitions. [2021-12-15 23:00:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:00:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2021-12-15 23:00:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:31,274 INFO L225 Difference]: With dead ends: 31365 [2021-12-15 23:00:31,275 INFO L226 Difference]: Without dead ends: 20604 [2021-12-15 23:00:31,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:31,287 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 871 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:31,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 211 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 23:00:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-12-15 23:00:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 19719. [2021-12-15 23:00:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19719 states, 19718 states have (on average 1.1815092808601277) internal successors, (23297), 19718 states have internal predecessors, (23297), 0 states have call successors, (0), 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 23:00:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19719 states to 19719 states and 23297 transitions. [2021-12-15 23:00:31,514 INFO L78 Accepts]: Start accepts. Automaton has 19719 states and 23297 transitions. Word has length 307 [2021-12-15 23:00:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:31,515 INFO L470 AbstractCegarLoop]: Abstraction has 19719 states and 23297 transitions. [2021-12-15 23:00:31,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 19719 states and 23297 transitions. [2021-12-15 23:00:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-15 23:00:31,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:31,532 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 23:00:31,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 23:00:31,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash -847313106, now seen corresponding path program 1 times [2021-12-15 23:00:31,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751592988] [2021-12-15 23:00:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:31,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 232 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-15 23:00:31,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751592988] [2021-12-15 23:00:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751592988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:31,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736529383] [2021-12-15 23:00:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:31,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:31,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:00:31,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 23:00:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 23:00:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 206 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:00:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:00:33,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736529383] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:33,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:00:33,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2021-12-15 23:00:33,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189165662] [2021-12-15 23:00:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:33,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 23:00:33,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 23:00:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:00:33,708 INFO L87 Difference]: Start difference. First operand 19719 states and 23297 transitions. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 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 23:00:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:37,000 INFO L93 Difference]: Finished difference Result 63284 states and 74303 transitions. [2021-12-15 23:00:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 23:00:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 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 388 [2021-12-15 23:00:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:37,082 INFO L225 Difference]: With dead ends: 63284 [2021-12-15 23:00:37,082 INFO L226 Difference]: Without dead ends: 42292 [2021-12-15 23:00:37,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 769 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 23:00:37,105 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1679 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:37,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1679 Valid, 136 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 23:00:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42292 states. [2021-12-15 23:00:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42292 to 42281. [2021-12-15 23:00:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42281 states, 42280 states have (on average 1.130558183538316) internal successors, (47800), 42280 states have internal predecessors, (47800), 0 states have call successors, (0), 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 23:00:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42281 states to 42281 states and 47800 transitions. [2021-12-15 23:00:37,589 INFO L78 Accepts]: Start accepts. Automaton has 42281 states and 47800 transitions. Word has length 388 [2021-12-15 23:00:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:37,589 INFO L470 AbstractCegarLoop]: Abstraction has 42281 states and 47800 transitions. [2021-12-15 23:00:37,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 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 23:00:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42281 states and 47800 transitions. [2021-12-15 23:00:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-12-15 23:00:37,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:37,610 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 23:00:37,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 23:00:37,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:37,828 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1251657393, now seen corresponding path program 1 times [2021-12-15 23:00:37,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:37,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458647778] [2021-12-15 23:00:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:37,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 401 proven. 73 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-15 23:00:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458647778] [2021-12-15 23:00:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458647778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698059809] [2021-12-15 23:00:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:38,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:00:38,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 23:00:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 23:00:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:00:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:00:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 401 proven. 73 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-15 23:00:39,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:00:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-15 23:00:39,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698059809] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 23:00:39,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:00:39,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 23:00:39,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271326020] [2021-12-15 23:00:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:39,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:39,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:39,953 INFO L87 Difference]: Start difference. First operand 42281 states and 47800 transitions. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 23:00:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:42,779 INFO L93 Difference]: Finished difference Result 100317 states and 113260 transitions. [2021-12-15 23:00:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:00:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 489 [2021-12-15 23:00:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:42,866 INFO L225 Difference]: With dead ends: 100317 [2021-12-15 23:00:42,866 INFO L226 Difference]: Without dead ends: 58038 [2021-12-15 23:00:42,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 973 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:00:42,903 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 819 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:42,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 137 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 23:00:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58038 states. [2021-12-15 23:00:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58038 to 54206. [2021-12-15 23:00:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54206 states, 54205 states have (on average 1.1211880822802325) internal successors, (60774), 54205 states have internal predecessors, (60774), 0 states have call successors, (0), 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 23:00:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54206 states to 54206 states and 60774 transitions. [2021-12-15 23:00:43,721 INFO L78 Accepts]: Start accepts. Automaton has 54206 states and 60774 transitions. Word has length 489 [2021-12-15 23:00:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:43,721 INFO L470 AbstractCegarLoop]: Abstraction has 54206 states and 60774 transitions. [2021-12-15 23:00:43,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 23:00:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 54206 states and 60774 transitions. [2021-12-15 23:00:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-15 23:00:43,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:43,743 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:43,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 23:00:43,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:00:43,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1707859524, now seen corresponding path program 1 times [2021-12-15 23:00:43,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135639513] [2021-12-15 23:00:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:43,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 537 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-15 23:00:44,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:44,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135639513] [2021-12-15 23:00:44,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135639513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:44,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:44,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:44,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844665498] [2021-12-15 23:00:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:44,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:44,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:44,393 INFO L87 Difference]: Start difference. First operand 54206 states and 60774 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 23:00:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:46,096 INFO L93 Difference]: Finished difference Result 124206 states and 138962 transitions. [2021-12-15 23:00:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 518 [2021-12-15 23:00:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:46,189 INFO L225 Difference]: With dead ends: 124206 [2021-12-15 23:00:46,189 INFO L226 Difference]: Without dead ends: 70002 [2021-12-15 23:00:46,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:46,232 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 364 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:46,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 752 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:00:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70002 states. [2021-12-15 23:00:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70002 to 69991. [2021-12-15 23:00:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69991 states, 69990 states have (on average 1.0986855265037863) internal successors, (76897), 69990 states have internal predecessors, (76897), 0 states have call successors, (0), 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 23:00:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69991 states to 69991 states and 76897 transitions. [2021-12-15 23:00:47,164 INFO L78 Accepts]: Start accepts. Automaton has 69991 states and 76897 transitions. Word has length 518 [2021-12-15 23:00:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 69991 states and 76897 transitions. [2021-12-15 23:00:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 23:00:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 69991 states and 76897 transitions. [2021-12-15 23:00:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-15 23:00:47,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:47,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:47,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 23:00:47,183 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 591051615, now seen corresponding path program 1 times [2021-12-15 23:00:47,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395183263] [2021-12-15 23:00:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:47,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 459 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 23:00:47,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395183263] [2021-12-15 23:00:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395183263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:47,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:47,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:00:47,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255578119] [2021-12-15 23:00:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:47,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:47,542 INFO L87 Difference]: Start difference. First operand 69991 states and 76897 transitions. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 23:00:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:50,475 INFO L93 Difference]: Finished difference Result 162143 states and 177788 transitions. [2021-12-15 23:00:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:00:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 520 [2021-12-15 23:00:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:50,664 INFO L225 Difference]: With dead ends: 162143 [2021-12-15 23:00:50,664 INFO L226 Difference]: Without dead ends: 91304 [2021-12-15 23:00:50,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:50,701 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 817 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:50,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 155 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 23:00:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91304 states. [2021-12-15 23:00:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91304 to 82324. [2021-12-15 23:00:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82324 states, 82323 states have (on average 1.098526535719058) internal successors, (90434), 82323 states have internal predecessors, (90434), 0 states have call successors, (0), 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 23:00:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82324 states to 82324 states and 90434 transitions. [2021-12-15 23:00:51,611 INFO L78 Accepts]: Start accepts. Automaton has 82324 states and 90434 transitions. Word has length 520 [2021-12-15 23:00:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:51,612 INFO L470 AbstractCegarLoop]: Abstraction has 82324 states and 90434 transitions. [2021-12-15 23:00:51,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 23:00:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 82324 states and 90434 transitions. [2021-12-15 23:00:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-12-15 23:00:51,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:51,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 23:00:51,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash 615543433, now seen corresponding path program 1 times [2021-12-15 23:00:51,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:51,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479648791] [2021-12-15 23:00:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:51,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-12-15 23:00:52,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:52,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479648791] [2021-12-15 23:00:52,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479648791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:52,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:52,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:52,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142581668] [2021-12-15 23:00:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:52,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:52,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:52,025 INFO L87 Difference]: Start difference. First operand 82324 states and 90434 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:53,843 INFO L93 Difference]: Finished difference Result 179956 states and 197553 transitions. [2021-12-15 23:00:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 561 [2021-12-15 23:00:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:53,956 INFO L225 Difference]: With dead ends: 179956 [2021-12-15 23:00:53,956 INFO L226 Difference]: Without dead ends: 97634 [2021-12-15 23:00:53,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:53,996 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 474 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:53,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 678 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 23:00:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97634 states.