./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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 87f1dffc4791cf25ae510fd8866e3e496425d62832b1b02adb55ef79c14eda4f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:11:24,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:11:24,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:11:24,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:11:24,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:11:24,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:11:24,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:11:24,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:11:24,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:11:24,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:11:24,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:11:24,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:11:24,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:11:24,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:11:24,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:11:24,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:11:24,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:11:24,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:11:24,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:11:24,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:11:24,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:11:24,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:11:24,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:11:24,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:11:24,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:11:24,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:11:24,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:11:24,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:11:24,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:11:24,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:11:24,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:11:24,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:11:24,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:11:24,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:11:24,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:11:24,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:11:24,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:11:24,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:11:24,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:11:24,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:11:24,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:11:24,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:11:24,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:11:24,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:11:24,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:11:24,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:11:24,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:11:24,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:11:24,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:11:24,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:11:24,678 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:11:24,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:11:24,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:11:24,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:11:24,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:11:24,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:11:24,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:11:24,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:11:24,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:11:24,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:11:24,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:11:24,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:11:24,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:11:24,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:11:24,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:11:24,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87f1dffc4791cf25ae510fd8866e3e496425d62832b1b02adb55ef79c14eda4f [2021-12-14 15:11:24,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:11:24,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:11:24,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:11:24,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:11:24,871 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:11:24,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:11:24,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a7e4bc6/76ebd00eece7486bb670a363cbedbc43/FLAG46ea628bd [2021-12-14 15:11:25,305 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:11:25,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:11:25,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a7e4bc6/76ebd00eece7486bb670a363cbedbc43/FLAG46ea628bd [2021-12-14 15:11:25,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a7e4bc6/76ebd00eece7486bb670a363cbedbc43 [2021-12-14 15:11:25,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:11:25,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:11:25,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:11:25,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:11:25,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:11:25,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75053d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25, skipping insertion in model container [2021-12-14 15:11:25,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:11:25,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:11:25,509 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2021-12-14 15:11:25,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:11:25,534 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:11:25,552 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4371,4384] [2021-12-14 15:11:25,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:11:25,573 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:11:25,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25 WrapperNode [2021-12-14 15:11:25,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:11:25,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:11:25,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:11:25,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:11:25,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,626 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 332 [2021-12-14 15:11:25,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:11:25,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:11:25,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:11:25,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:11:25,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:11:25,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:11:25,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:11:25,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:11:25,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (1/1) ... [2021-12-14 15:11:25,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:11:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:11:25,729 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) [2021-12-14 15:11:25,731 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 [2021-12-14 15:11:25,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:11:25,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:11:25,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:11:25,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:11:25,867 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:11:25,869 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:11:26,129 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:11:26,134 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:11:26,134 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:11:26,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:11:26 BoogieIcfgContainer [2021-12-14 15:11:26,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:11:26,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:11:26,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:11:26,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:11:26,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:11:25" (1/3) ... [2021-12-14 15:11:26,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a15b4d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:11:26, skipping insertion in model container [2021-12-14 15:11:26,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:25" (2/3) ... [2021-12-14 15:11:26,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a15b4d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:11:26, skipping insertion in model container [2021-12-14 15:11:26,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:11:26" (3/3) ... [2021-12-14 15:11:26,142 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-14 15:11:26,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:11:26,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:11:26,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:11:26,193 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 [2021-12-14 15:11:26,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:11:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 15:11:26,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:26,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:11:26,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1258202004, now seen corresponding path program 1 times [2021-12-14 15:11:26,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692925486] [2021-12-14 15:11:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:26,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:26,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:26,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692925486] [2021-12-14 15:11:26,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692925486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:26,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:26,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:26,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363805170] [2021-12-14 15:11:26,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:26,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:26,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:26,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:26,449 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.6867469879518073) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:26,520 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2021-12-14 15:11:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 15:11:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:26,532 INFO L225 Difference]: With dead ends: 199 [2021-12-14 15:11:26,532 INFO L226 Difference]: Without dead ends: 128 [2021-12-14 15:11:26,535 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 [2021-12-14 15:11:26,538 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 101 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:26,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-14 15:11:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-12-14 15:11:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.504) internal successors, (188), 125 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2021-12-14 15:11:26,589 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 37 [2021-12-14 15:11:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:26,590 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2021-12-14 15:11:26,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2021-12-14 15:11:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 15:11:26,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:26,593 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] [2021-12-14 15:11:26,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:11:26,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2004783502, now seen corresponding path program 1 times [2021-12-14 15:11:26,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006132054] [2021-12-14 15:11:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:26,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:26,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006132054] [2021-12-14 15:11:26,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006132054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:26,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:26,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:26,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147007666] [2021-12-14 15:11:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:26,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:26,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:26,674 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:26,701 INFO L93 Difference]: Finished difference Result 306 states and 472 transitions. [2021-12-14 15:11:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:26,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 15:11:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:26,703 INFO L225 Difference]: With dead ends: 306 [2021-12-14 15:11:26,704 INFO L226 Difference]: Without dead ends: 200 [2021-12-14 15:11:26,704 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 [2021-12-14 15:11:26,705 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:26,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-14 15:11:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-12-14 15:11:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 197 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 301 transitions. [2021-12-14 15:11:26,743 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 301 transitions. Word has length 38 [2021-12-14 15:11:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:26,743 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 301 transitions. [2021-12-14 15:11:26,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 301 transitions. [2021-12-14 15:11:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 15:11:26,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:26,745 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] [2021-12-14 15:11:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:11:26,745 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 337157617, now seen corresponding path program 1 times [2021-12-14 15:11:26,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532851108] [2021-12-14 15:11:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:26,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:26,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:26,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532851108] [2021-12-14 15:11:26,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532851108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:26,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:26,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:26,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220676069] [2021-12-14 15:11:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:26,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:26,842 INFO L87 Difference]: Start difference. First operand 198 states and 301 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:26,885 INFO L93 Difference]: Finished difference Result 490 states and 759 transitions. [2021-12-14 15:11:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-12-14 15:11:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:26,887 INFO L225 Difference]: With dead ends: 490 [2021-12-14 15:11:26,887 INFO L226 Difference]: Without dead ends: 312 [2021-12-14 15:11:26,888 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 [2021-12-14 15:11:26,889 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:26,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 239 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-14 15:11:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2021-12-14 15:11:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5307443365695792) internal successors, (473), 309 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 473 transitions. [2021-12-14 15:11:26,909 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 473 transitions. Word has length 39 [2021-12-14 15:11:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:26,909 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 473 transitions. [2021-12-14 15:11:26,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 473 transitions. [2021-12-14 15:11:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 15:11:26,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:26,914 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] [2021-12-14 15:11:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:11:26,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1621587317, now seen corresponding path program 1 times [2021-12-14 15:11:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596230073] [2021-12-14 15:11:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:26,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:26,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596230073] [2021-12-14 15:11:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596230073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:26,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:26,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:11:26,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213891537] [2021-12-14 15:11:26,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:26,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:26,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:26,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:26,981 INFO L87 Difference]: Start difference. First operand 310 states and 473 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:27,085 INFO L93 Difference]: Finished difference Result 1470 states and 2285 transitions. [2021-12-14 15:11:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:11:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-14 15:11:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:27,091 INFO L225 Difference]: With dead ends: 1470 [2021-12-14 15:11:27,091 INFO L226 Difference]: Without dead ends: 1180 [2021-12-14 15:11:27,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:11:27,095 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 486 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:27,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 660 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-14 15:11:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 598. [2021-12-14 15:11:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5226130653266332) internal successors, (909), 597 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 909 transitions. [2021-12-14 15:11:27,137 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 909 transitions. Word has length 40 [2021-12-14 15:11:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 909 transitions. [2021-12-14 15:11:27,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 909 transitions. [2021-12-14 15:11:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 15:11:27,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:27,138 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] [2021-12-14 15:11:27,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:11:27,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1289857042, now seen corresponding path program 1 times [2021-12-14 15:11:27,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:27,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622568726] [2021-12-14 15:11:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:27,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:27,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622568726] [2021-12-14 15:11:27,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622568726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:27,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:27,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:11:27,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488808115] [2021-12-14 15:11:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:27,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:27,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:27,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:27,223 INFO L87 Difference]: Start difference. First operand 598 states and 909 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:27,310 INFO L93 Difference]: Finished difference Result 2068 states and 3144 transitions. [2021-12-14 15:11:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:11:27,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 15:11:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:27,315 INFO L225 Difference]: With dead ends: 2068 [2021-12-14 15:11:27,315 INFO L226 Difference]: Without dead ends: 1490 [2021-12-14 15:11:27,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:27,319 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 317 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:27,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 362 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-12-14 15:11:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1486. [2021-12-14 15:11:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.5063973063973064) internal successors, (2237), 1485 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2237 transitions. [2021-12-14 15:11:27,410 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2237 transitions. Word has length 41 [2021-12-14 15:11:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:27,411 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 2237 transitions. [2021-12-14 15:11:27,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2237 transitions. [2021-12-14 15:11:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 15:11:27,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:27,413 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] [2021-12-14 15:11:27,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:11:27,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash 97793413, now seen corresponding path program 1 times [2021-12-14 15:11:27,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:27,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073298536] [2021-12-14 15:11:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:27,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:27,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:27,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073298536] [2021-12-14 15:11:27,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073298536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:27,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:27,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:11:27,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723179903] [2021-12-14 15:11:27,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:27,463 INFO L87 Difference]: Start difference. First operand 1486 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:27,748 INFO L93 Difference]: Finished difference Result 4418 states and 6671 transitions. [2021-12-14 15:11:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:11:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 15:11:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:27,756 INFO L225 Difference]: With dead ends: 4418 [2021-12-14 15:11:27,757 INFO L226 Difference]: Without dead ends: 2952 [2021-12-14 15:11:27,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:11:27,767 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 494 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 139 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:11:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-12-14 15:11:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2950. [2021-12-14 15:11:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 1.4991522550016956) internal successors, (4421), 2949 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4421 transitions. [2021-12-14 15:11:27,926 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4421 transitions. Word has length 43 [2021-12-14 15:11:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:27,927 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 4421 transitions. [2021-12-14 15:11:27,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4421 transitions. [2021-12-14 15:11:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 15:11:27,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:27,929 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] [2021-12-14 15:11:27,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:11:27,929 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1723958080, now seen corresponding path program 1 times [2021-12-14 15:11:27,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:27,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955567264] [2021-12-14 15:11:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:27,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:28,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:28,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955567264] [2021-12-14 15:11:28,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955567264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:28,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:28,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:11:28,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367525946] [2021-12-14 15:11:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:28,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:28,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:28,007 INFO L87 Difference]: Start difference. First operand 2950 states and 4421 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:28,255 INFO L93 Difference]: Finished difference Result 6072 states and 9014 transitions. [2021-12-14 15:11:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:11:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 15:11:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:28,273 INFO L225 Difference]: With dead ends: 6072 [2021-12-14 15:11:28,273 INFO L226 Difference]: Without dead ends: 6070 [2021-12-14 15:11:28,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:11:28,279 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:28,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 571 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-12-14 15:11:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 3142. [2021-12-14 15:11:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.4686405603311048) internal successors, (4613), 3141 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4613 transitions. [2021-12-14 15:11:28,490 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4613 transitions. Word has length 43 [2021-12-14 15:11:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:28,491 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4613 transitions. [2021-12-14 15:11:28,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4613 transitions. [2021-12-14 15:11:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 15:11:28,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:28,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:11:28,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:11:28,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1913665939, now seen corresponding path program 1 times [2021-12-14 15:11:28,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:28,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409768031] [2021-12-14 15:11:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:28,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:28,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409768031] [2021-12-14 15:11:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409768031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:28,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:28,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:28,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608445709] [2021-12-14 15:11:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:28,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:28,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:28,537 INFO L87 Difference]: Start difference. First operand 3142 states and 4613 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:28,695 INFO L93 Difference]: Finished difference Result 7604 states and 11171 transitions. [2021-12-14 15:11:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-14 15:11:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:28,708 INFO L225 Difference]: With dead ends: 7604 [2021-12-14 15:11:28,708 INFO L226 Difference]: Without dead ends: 4482 [2021-12-14 15:11:28,712 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 [2021-12-14 15:11:28,713 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:28,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-12-14 15:11:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4480. [2021-12-14 15:11:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 1.4594775619557938) internal successors, (6537), 4479 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6537 transitions. [2021-12-14 15:11:28,932 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6537 transitions. Word has length 44 [2021-12-14 15:11:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:28,933 INFO L470 AbstractCegarLoop]: Abstraction has 4480 states and 6537 transitions. [2021-12-14 15:11:28,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6537 transitions. [2021-12-14 15:11:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 15:11:28,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:28,935 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:28,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:11:28,935 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1827424966, now seen corresponding path program 1 times [2021-12-14 15:11:28,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807310612] [2021-12-14 15:11:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:28,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:29,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807310612] [2021-12-14 15:11:29,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807310612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:11:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386417721] [2021-12-14 15:11:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:29,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:11:29,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:11:29,048 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) [2021-12-14 15:11:29,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:11:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 15:11:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:11:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:11:29,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:11:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:11:29,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386417721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:11:29,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:11:29,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2021-12-14 15:11:29,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466486249] [2021-12-14 15:11:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:11:29,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 15:11:29,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 15:11:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:11:29,614 INFO L87 Difference]: Start difference. First operand 4480 states and 6537 transitions. Second operand has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:36,130 INFO L93 Difference]: Finished difference Result 40883 states and 58845 transitions. [2021-12-14 15:11:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-14 15:11:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 0 states have call successors, (0), 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 61 [2021-12-14 15:11:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:36,231 INFO L225 Difference]: With dead ends: 40883 [2021-12-14 15:11:36,231 INFO L226 Difference]: Without dead ends: 36909 [2021-12-14 15:11:36,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9670 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3948, Invalid=18402, Unknown=0, NotChecked=0, Total=22350 [2021-12-14 15:11:36,253 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 6006 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6006 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:36,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6006 Valid, 2546 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2968 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 15:11:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-12-14 15:11:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 15628. [2021-12-14 15:11:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15628 states, 15627 states have (on average 1.4402636462532796) internal successors, (22507), 15627 states have internal predecessors, (22507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 22507 transitions. [2021-12-14 15:11:37,333 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 22507 transitions. Word has length 61 [2021-12-14 15:11:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:37,333 INFO L470 AbstractCegarLoop]: Abstraction has 15628 states and 22507 transitions. [2021-12-14 15:11:37,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.058823529411764) internal successors, (171), 17 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 22507 transitions. [2021-12-14 15:11:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:11:37,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:37,336 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:37,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:11:37,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:11:37,552 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash 621000165, now seen corresponding path program 1 times [2021-12-14 15:11:37,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:37,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578552320] [2021-12-14 15:11:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:37,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:37,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:37,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578552320] [2021-12-14 15:11:37,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578552320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:37,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:37,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:37,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450864611] [2021-12-14 15:11:37,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:37,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:37,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:37,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:37,600 INFO L87 Difference]: Start difference. First operand 15628 states and 22507 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:38,679 INFO L93 Difference]: Finished difference Result 25124 states and 35975 transitions. [2021-12-14 15:11:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:11:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:38,704 INFO L225 Difference]: With dead ends: 25124 [2021-12-14 15:11:38,704 INFO L226 Difference]: Without dead ends: 16161 [2021-12-14 15:11:38,714 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 [2021-12-14 15:11:38,715 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 67 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:38,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 265 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16161 states. [2021-12-14 15:11:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16161 to 15717. [2021-12-14 15:11:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15717 states, 15716 states have (on average 1.4122550267243574) internal successors, (22195), 15716 states have internal predecessors, (22195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15717 states to 15717 states and 22195 transitions. [2021-12-14 15:11:39,567 INFO L78 Accepts]: Start accepts. Automaton has 15717 states and 22195 transitions. Word has length 62 [2021-12-14 15:11:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:39,567 INFO L470 AbstractCegarLoop]: Abstraction has 15717 states and 22195 transitions. [2021-12-14 15:11:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15717 states and 22195 transitions. [2021-12-14 15:11:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:11:39,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:39,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:11:39,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2941002, now seen corresponding path program 1 times [2021-12-14 15:11:39,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:39,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855069200] [2021-12-14 15:11:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:39,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:39,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855069200] [2021-12-14 15:11:39,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855069200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:39,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:39,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:39,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467304903] [2021-12-14 15:11:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:39,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:39,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:39,617 INFO L87 Difference]: Start difference. First operand 15717 states and 22195 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:40,844 INFO L93 Difference]: Finished difference Result 39144 states and 54917 transitions. [2021-12-14 15:11:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:11:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:40,885 INFO L225 Difference]: With dead ends: 39144 [2021-12-14 15:11:40,885 INFO L226 Difference]: Without dead ends: 26345 [2021-12-14 15:11:40,904 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 [2021-12-14 15:11:40,905 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 63 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:40,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26345 states. [2021-12-14 15:11:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26345 to 26294. [2021-12-14 15:11:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26294 states, 26293 states have (on average 1.3832198684060397) internal successors, (36369), 26293 states have internal predecessors, (36369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26294 states to 26294 states and 36369 transitions. [2021-12-14 15:11:42,390 INFO L78 Accepts]: Start accepts. Automaton has 26294 states and 36369 transitions. Word has length 62 [2021-12-14 15:11:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:42,391 INFO L470 AbstractCegarLoop]: Abstraction has 26294 states and 36369 transitions. [2021-12-14 15:11:42,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 26294 states and 36369 transitions. [2021-12-14 15:11:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:11:42,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:42,394 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:42,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:11:42,395 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 954450183, now seen corresponding path program 1 times [2021-12-14 15:11:42,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633082871] [2021-12-14 15:11:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:42,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:11:42,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633082871] [2021-12-14 15:11:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633082871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:42,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:42,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:42,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136182299] [2021-12-14 15:11:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:42,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:42,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:42,418 INFO L87 Difference]: Start difference. First operand 26294 states and 36369 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:43,782 INFO L93 Difference]: Finished difference Result 53591 states and 73937 transitions. [2021-12-14 15:11:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:11:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:43,840 INFO L225 Difference]: With dead ends: 53591 [2021-12-14 15:11:43,840 INFO L226 Difference]: Without dead ends: 29492 [2021-12-14 15:11:43,875 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 [2021-12-14 15:11:43,875 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:43,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29492 states. [2021-12-14 15:11:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29492 to 26067. [2021-12-14 15:11:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26067 states, 26066 states have (on average 1.364881454768664) internal successors, (35577), 26066 states have internal predecessors, (35577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26067 states to 26067 states and 35577 transitions. [2021-12-14 15:11:45,427 INFO L78 Accepts]: Start accepts. Automaton has 26067 states and 35577 transitions. Word has length 62 [2021-12-14 15:11:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:45,427 INFO L470 AbstractCegarLoop]: Abstraction has 26067 states and 35577 transitions. [2021-12-14 15:11:45,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 26067 states and 35577 transitions. [2021-12-14 15:11:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:11:45,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:45,433 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:45,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:11:45,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -922232594, now seen corresponding path program 1 times [2021-12-14 15:11:45,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497545349] [2021-12-14 15:11:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:45,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 15:11:45,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:45,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497545349] [2021-12-14 15:11:45,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497545349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:45,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:45,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:11:45,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177385186] [2021-12-14 15:11:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:45,482 INFO L87 Difference]: Start difference. First operand 26067 states and 35577 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:47,807 INFO L93 Difference]: Finished difference Result 49877 states and 68699 transitions. [2021-12-14 15:11:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:11:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 62 [2021-12-14 15:11:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:47,870 INFO L225 Difference]: With dead ends: 49877 [2021-12-14 15:11:47,870 INFO L226 Difference]: Without dead ends: 42341 [2021-12-14 15:11:47,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:11:47,894 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 341 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:47,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 551 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42341 states. [2021-12-14 15:11:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42341 to 33261. [2021-12-14 15:11:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33261 states, 33260 states have (on average 1.3632591701743837) internal successors, (45342), 33260 states have internal predecessors, (45342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33261 states to 33261 states and 45342 transitions. [2021-12-14 15:11:50,030 INFO L78 Accepts]: Start accepts. Automaton has 33261 states and 45342 transitions. Word has length 62 [2021-12-14 15:11:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:50,030 INFO L470 AbstractCegarLoop]: Abstraction has 33261 states and 45342 transitions. [2021-12-14 15:11:50,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33261 states and 45342 transitions. [2021-12-14 15:11:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:11:50,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:50,035 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:50,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:11:50,036 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2021-12-14 15:11:50,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540807592] [2021-12-14 15:11:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:50,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:11:50,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:50,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540807592] [2021-12-14 15:11:50,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540807592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:50,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:50,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:11:50,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841040194] [2021-12-14 15:11:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:11:50,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:11:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:11:50,096 INFO L87 Difference]: Start difference. First operand 33261 states and 45342 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:52,964 INFO L93 Difference]: Finished difference Result 57850 states and 79500 transitions. [2021-12-14 15:11:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:11:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 62 [2021-12-14 15:11:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:53,055 INFO L225 Difference]: With dead ends: 57850 [2021-12-14 15:11:53,055 INFO L226 Difference]: Without dead ends: 47596 [2021-12-14 15:11:53,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:11:53,080 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 335 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:53,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 590 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47596 states. [2021-12-14 15:11:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47596 to 41575. [2021-12-14 15:11:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41575 states, 41574 states have (on average 1.3585173425698753) internal successors, (56479), 41574 states have internal predecessors, (56479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 56479 transitions. [2021-12-14 15:11:55,886 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 56479 transitions. Word has length 62 [2021-12-14 15:11:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:11:55,886 INFO L470 AbstractCegarLoop]: Abstraction has 41575 states and 56479 transitions. [2021-12-14 15:11:55,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 56479 transitions. [2021-12-14 15:11:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 15:11:55,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:11:55,908 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:11:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:11:55,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:11:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:11:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 901849755, now seen corresponding path program 1 times [2021-12-14 15:11:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:11:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098896198] [2021-12-14 15:11:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:11:55,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:11:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:11:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 15:11:55,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:11:55,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098896198] [2021-12-14 15:11:55,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098896198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:11:55,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:11:55,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:11:55,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631147679] [2021-12-14 15:11:55,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:11:55,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:11:55,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:11:55,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:11:55,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:11:55,937 INFO L87 Difference]: Start difference. First operand 41575 states and 56479 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:11:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:11:58,163 INFO L93 Difference]: Finished difference Result 80049 states and 108817 transitions. [2021-12-14 15:11:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:11:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 63 [2021-12-14 15:11:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:11:58,218 INFO L225 Difference]: With dead ends: 80049 [2021-12-14 15:11:58,218 INFO L226 Difference]: Without dead ends: 38531 [2021-12-14 15:11:58,257 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 [2021-12-14 15:11:58,257 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 82 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:11:58,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 126 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:11:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38531 states. [2021-12-14 15:12:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38531 to 37056. [2021-12-14 15:12:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37056 states, 37055 states have (on average 1.3416273107542842) internal successors, (49714), 37055 states have internal predecessors, (49714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37056 states to 37056 states and 49714 transitions. [2021-12-14 15:12:00,696 INFO L78 Accepts]: Start accepts. Automaton has 37056 states and 49714 transitions. Word has length 63 [2021-12-14 15:12:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:00,696 INFO L470 AbstractCegarLoop]: Abstraction has 37056 states and 49714 transitions. [2021-12-14 15:12:00,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37056 states and 49714 transitions. [2021-12-14 15:12:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 15:12:00,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:00,700 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:12:00,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:12:00,700 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash -121604344, now seen corresponding path program 1 times [2021-12-14 15:12:00,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:00,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450677175] [2021-12-14 15:12:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:00,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 15:12:00,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450677175] [2021-12-14 15:12:00,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450677175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:00,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:00,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:12:00,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795959856] [2021-12-14 15:12:00,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:00,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:00,761 INFO L87 Difference]: Start difference. First operand 37056 states and 49714 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:03,819 INFO L93 Difference]: Finished difference Result 61740 states and 83595 transitions. [2021-12-14 15:12:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:12:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 63 [2021-12-14 15:12:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:03,910 INFO L225 Difference]: With dead ends: 61740 [2021-12-14 15:12:03,911 INFO L226 Difference]: Without dead ends: 51490 [2021-12-14 15:12:03,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:03,936 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 324 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:03,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 534 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51490 states. [2021-12-14 15:12:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51490 to 44872. [2021-12-14 15:12:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44872 states, 44871 states have (on average 1.3396848744177754) internal successors, (60113), 44871 states have internal predecessors, (60113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44872 states to 44872 states and 60113 transitions. [2021-12-14 15:12:06,758 INFO L78 Accepts]: Start accepts. Automaton has 44872 states and 60113 transitions. Word has length 63 [2021-12-14 15:12:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 44872 states and 60113 transitions. [2021-12-14 15:12:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:12:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 44872 states and 60113 transitions. [2021-12-14 15:12:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 15:12:06,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:06,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:12:06,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:12:06,764 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash 746654310, now seen corresponding path program 1 times [2021-12-14 15:12:06,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561750452] [2021-12-14 15:12:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:06,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 15:12:06,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561750452] [2021-12-14 15:12:06,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561750452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:06,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:06,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:12:06,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062070069] [2021-12-14 15:12:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:06,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:06,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:06,795 INFO L87 Difference]: Start difference. First operand 44872 states and 60113 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)