./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.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 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 16:11:37,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 16:11:37,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 16:11:37,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 16:11:37,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 16:11:37,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 16:11:37,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 16:11:37,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 16:11:37,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 16:11:37,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 16:11:37,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 16:11:37,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 16:11:37,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 16:11:37,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 16:11:37,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 16:11:37,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 16:11:37,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 16:11:37,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 16:11:37,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 16:11:37,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 16:11:37,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 16:11:37,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 16:11:37,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 16:11:37,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 16:11:37,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 16:11:37,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 16:11:37,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 16:11:37,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 16:11:37,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 16:11:37,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 16:11:37,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 16:11:37,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 16:11:37,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 16:11:37,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 16:11:37,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 16:11:37,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 16:11:37,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 16:11:37,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 16:11:37,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 16:11:37,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 16:11:37,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 16:11:37,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 16:11:37,666 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 16:11:37,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 16:11:37,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 16:11:37,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 16:11:37,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 16:11:37,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 16:11:37,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 16:11:37,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 16:11:37,669 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 16:11:37,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 16:11:37,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 16:11:37,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 16:11:37,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 16:11:37,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 16:11:37,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 16:11:37,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 16:11:37,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 16:11:37,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:11:37,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 16:11:37,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 16:11:37,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 16:11:37,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f [2021-12-17 16:11:37,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 16:11:37,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 16:11:37,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 16:11:37,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 16:11:37,882 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 16:11:37,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-17 16:11:37,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d80887d/5d2de8cf2f784f2ea3a006117fda9bfc/FLAG680ef42e9 [2021-12-17 16:11:38,297 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 16:11:38,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-17 16:11:38,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d80887d/5d2de8cf2f784f2ea3a006117fda9bfc/FLAG680ef42e9 [2021-12-17 16:11:38,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d80887d/5d2de8cf2f784f2ea3a006117fda9bfc [2021-12-17 16:11:38,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 16:11:38,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 16:11:38,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 16:11:38,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 16:11:38,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 16:11:38,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ae0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38, skipping insertion in model container [2021-12-17 16:11:38,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 16:11:38,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 16:11:38,572 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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2021-12-17 16:11:38,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:11:38,614 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 16:11:38,646 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.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2021-12-17 16:11:38,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 16:11:38,686 INFO L208 MainTranslator]: Completed translation [2021-12-17 16:11:38,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38 WrapperNode [2021-12-17 16:11:38,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 16:11:38,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 16:11:38,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 16:11:38,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 16:11:38,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,740 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 423 [2021-12-17 16:11:38,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 16:11:38,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 16:11:38,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 16:11:38,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 16:11:38,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 16:11:38,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 16:11:38,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 16:11:38,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 16:11:38,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (1/1) ... [2021-12-17 16:11:38,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 16:11:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:11:38,811 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) [2021-12-17 16:11:38,814 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 [2021-12-17 16:11:38,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 16:11:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 16:11:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 16:11:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 16:11:38,942 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 16:11:38,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 16:11:39,202 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 16:11:39,208 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 16:11:39,208 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 16:11:39,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:11:39 BoogieIcfgContainer [2021-12-17 16:11:39,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 16:11:39,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 16:11:39,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 16:11:39,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 16:11:39,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:11:38" (1/3) ... [2021-12-17 16:11:39,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40705a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:11:39, skipping insertion in model container [2021-12-17 16:11:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:11:38" (2/3) ... [2021-12-17 16:11:39,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40705a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:11:39, skipping insertion in model container [2021-12-17 16:11:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:11:39" (3/3) ... [2021-12-17 16:11:39,216 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-17 16:11:39,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 16:11:39,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 16:11:39,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 16:11:39,251 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 [2021-12-17 16:11:39,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 16:11:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 16:11:39,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:39,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:39,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2117585175, now seen corresponding path program 1 times [2021-12-17 16:11:39,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646649058] [2021-12-17 16:11:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:39,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:39,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646649058] [2021-12-17 16:11:39,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646649058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:39,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:39,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:11:39,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442790168] [2021-12-17 16:11:39,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:39,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:11:39,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:11:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:11:39,539 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 111 states have internal predecessors, (185), 0 states have call successors, (0), 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 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:39,610 INFO L93 Difference]: Finished difference Result 266 states and 425 transitions. [2021-12-17 16:11:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:11:39,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-12-17 16:11:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:39,623 INFO L225 Difference]: With dead ends: 266 [2021-12-17 16:11:39,624 INFO L226 Difference]: Without dead ends: 175 [2021-12-17 16:11:39,627 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 [2021-12-17 16:11:39,629 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 130 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 384 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 [2021-12-17 16:11:39,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:39,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-17 16:11:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2021-12-17 16:11:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.505813953488372) internal successors, (259), 172 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2021-12-17 16:11:39,684 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 49 [2021-12-17 16:11:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:39,684 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2021-12-17 16:11:39,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2021-12-17 16:11:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 16:11:39,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:39,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:39,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 16:11:39,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1419109229, now seen corresponding path program 1 times [2021-12-17 16:11:39,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:39,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094738010] [2021-12-17 16:11:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:39,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:39,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:39,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094738010] [2021-12-17 16:11:39,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094738010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:39,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:39,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:11:39,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927433076] [2021-12-17 16:11:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:39,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:11:39,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:11:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:11:39,798 INFO L87 Difference]: Start difference. First operand 173 states and 259 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:39,840 INFO L93 Difference]: Finished difference Result 433 states and 671 transitions. [2021-12-17 16:11:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:11:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-17 16:11:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:39,842 INFO L225 Difference]: With dead ends: 433 [2021-12-17 16:11:39,842 INFO L226 Difference]: Without dead ends: 287 [2021-12-17 16:11:39,843 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 [2021-12-17 16:11:39,844 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 108 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 329 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 [2021-12-17 16:11:39,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 329 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-17 16:11:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2021-12-17 16:11:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5352112676056338) internal successors, (436), 284 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2021-12-17 16:11:39,859 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 50 [2021-12-17 16:11:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:39,864 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2021-12-17 16:11:39,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2021-12-17 16:11:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 16:11:39,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:39,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:39,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 16:11:39,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1570665396, now seen corresponding path program 1 times [2021-12-17 16:11:39,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:39,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571384303] [2021-12-17 16:11:39,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:39,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:39,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571384303] [2021-12-17 16:11:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571384303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:39,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:11:39,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596101977] [2021-12-17 16:11:39,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:39,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:11:39,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:11:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:11:39,937 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:39,976 INFO L93 Difference]: Finished difference Result 737 states and 1150 transitions. [2021-12-17 16:11:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:11:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-17 16:11:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:39,978 INFO L225 Difference]: With dead ends: 737 [2021-12-17 16:11:39,978 INFO L226 Difference]: Without dead ends: 479 [2021-12-17 16:11:39,979 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 [2021-12-17 16:11:39,980 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 103 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 314 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 [2021-12-17 16:11:39,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-17 16:11:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2021-12-17 16:11:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.546218487394958) internal successors, (736), 476 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 736 transitions. [2021-12-17 16:11:40,000 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 736 transitions. Word has length 51 [2021-12-17 16:11:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:40,000 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 736 transitions. [2021-12-17 16:11:40,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 736 transitions. [2021-12-17 16:11:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 16:11:40,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:40,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:40,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 16:11:40,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1205622842, now seen corresponding path program 1 times [2021-12-17 16:11:40,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830962638] [2021-12-17 16:11:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:40,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:40,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:40,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830962638] [2021-12-17 16:11:40,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830962638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:40,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:40,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:11:40,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267611880] [2021-12-17 16:11:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:40,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:11:40,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:11:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:11:40,077 INFO L87 Difference]: Start difference. First operand 477 states and 736 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:40,205 INFO L93 Difference]: Finished difference Result 2727 states and 4281 transitions. [2021-12-17 16:11:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:11:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-17 16:11:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:40,214 INFO L225 Difference]: With dead ends: 2727 [2021-12-17 16:11:40,214 INFO L226 Difference]: Without dead ends: 2277 [2021-12-17 16:11:40,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 16:11:40,225 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1016 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:11:40,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1218 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-12-17 16:11:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 925. [2021-12-17 16:11:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.5454545454545454) internal successors, (1428), 924 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1428 transitions. [2021-12-17 16:11:40,280 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1428 transitions. Word has length 52 [2021-12-17 16:11:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:40,280 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1428 transitions. [2021-12-17 16:11:40,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1428 transitions. [2021-12-17 16:11:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 16:11:40,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:40,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:40,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 16:11:40,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1299853839, now seen corresponding path program 1 times [2021-12-17 16:11:40,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296808739] [2021-12-17 16:11:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:40,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296808739] [2021-12-17 16:11:40,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296808739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:40,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:40,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 16:11:40,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280373839] [2021-12-17 16:11:40,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 16:11:40,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 16:11:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:11:40,397 INFO L87 Difference]: Start difference. First operand 925 states and 1428 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:40,569 INFO L93 Difference]: Finished difference Result 4029 states and 6232 transitions. [2021-12-17 16:11:40,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:11:40,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-17 16:11:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:40,583 INFO L225 Difference]: With dead ends: 4029 [2021-12-17 16:11:40,583 INFO L226 Difference]: Without dead ends: 3131 [2021-12-17 16:11:40,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 16:11:40,590 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 509 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:11:40,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 739 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-12-17 16:11:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3125. [2021-12-17 16:11:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 1.5403329065300897) internal successors, (4812), 3124 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4812 transitions. [2021-12-17 16:11:40,789 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4812 transitions. Word has length 53 [2021-12-17 16:11:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 4812 transitions. [2021-12-17 16:11:40,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4812 transitions. [2021-12-17 16:11:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 16:11:40,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:40,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:40,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 16:11:40,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1774851107, now seen corresponding path program 1 times [2021-12-17 16:11:40,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:40,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746970041] [2021-12-17 16:11:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:40,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:40,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:40,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746970041] [2021-12-17 16:11:40,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746970041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:40,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:40,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:11:40,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323304996] [2021-12-17 16:11:40,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:40,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:11:40,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:40,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:11:40,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:11:40,864 INFO L87 Difference]: Start difference. First operand 3125 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:41,123 INFO L93 Difference]: Finished difference Result 8249 states and 12654 transitions. [2021-12-17 16:11:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:11:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-17 16:11:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:41,137 INFO L225 Difference]: With dead ends: 8249 [2021-12-17 16:11:41,137 INFO L226 Difference]: Without dead ends: 5151 [2021-12-17 16:11:41,141 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 [2021-12-17 16:11:41,142 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 115 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 369 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 [2021-12-17 16:11:41,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 369 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-12-17 16:11:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5149. [2021-12-17 16:11:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5148 states have (on average 1.5159285159285159) internal successors, (7804), 5148 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 7804 transitions. [2021-12-17 16:11:41,344 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 7804 transitions. Word has length 54 [2021-12-17 16:11:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:41,344 INFO L470 AbstractCegarLoop]: Abstraction has 5149 states and 7804 transitions. [2021-12-17 16:11:41,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 7804 transitions. [2021-12-17 16:11:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 16:11:41,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:41,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:41,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 16:11:41,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash -850826877, now seen corresponding path program 1 times [2021-12-17 16:11:41,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848281117] [2021-12-17 16:11:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:41,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:41,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:41,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848281117] [2021-12-17 16:11:41,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848281117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:41,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:41,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 16:11:41,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264485497] [2021-12-17 16:11:41,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:41,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 16:11:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 16:11:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 16:11:41,442 INFO L87 Difference]: Start difference. First operand 5149 states and 7804 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:41,943 INFO L93 Difference]: Finished difference Result 10527 states and 15837 transitions. [2021-12-17 16:11:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 16:11:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-17 16:11:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:41,976 INFO L225 Difference]: With dead ends: 10527 [2021-12-17 16:11:41,977 INFO L226 Difference]: Without dead ends: 10525 [2021-12-17 16:11:41,979 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 [2021-12-17 16:11:41,980 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 248 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:11:41,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 771 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-12-17 16:11:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 5405. [2021-12-17 16:11:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.4914877868245744) internal successors, (8060), 5404 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8060 transitions. [2021-12-17 16:11:42,307 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8060 transitions. Word has length 55 [2021-12-17 16:11:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:42,308 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 8060 transitions. [2021-12-17 16:11:42,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8060 transitions. [2021-12-17 16:11:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 16:11:42,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:42,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:42,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 16:11:42,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -595256360, now seen corresponding path program 1 times [2021-12-17 16:11:42,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:42,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707380477] [2021-12-17 16:11:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:42,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707380477] [2021-12-17 16:11:42,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707380477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:11:42,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:11:42,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:11:42,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838259552] [2021-12-17 16:11:42,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:11:42,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:11:42,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:11:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:11:42,375 INFO L87 Difference]: Start difference. First operand 5405 states and 8060 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:42,706 INFO L93 Difference]: Finished difference Result 13259 states and 19788 transitions. [2021-12-17 16:11:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:11:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-17 16:11:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:42,725 INFO L225 Difference]: With dead ends: 13259 [2021-12-17 16:11:42,726 INFO L226 Difference]: Without dead ends: 7881 [2021-12-17 16:11:42,732 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 [2021-12-17 16:11:42,733 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 92 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:11:42,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 281 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:11:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2021-12-17 16:11:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7823. [2021-12-17 16:11:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.4812068524673996) internal successors, (11586), 7822 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 11586 transitions. [2021-12-17 16:11:43,079 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 11586 transitions. Word has length 56 [2021-12-17 16:11:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:11:43,080 INFO L470 AbstractCegarLoop]: Abstraction has 7823 states and 11586 transitions. [2021-12-17 16:11:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 11586 transitions. [2021-12-17 16:11:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 16:11:43,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:11:43,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:11:43,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 16:11:43,084 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:11:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:11:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -264442661, now seen corresponding path program 1 times [2021-12-17 16:11:43,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:11:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268273949] [2021-12-17 16:11:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:43,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:11:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:11:43,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:11:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268273949] [2021-12-17 16:11:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268273949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 16:11:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013567787] [2021-12-17 16:11:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:11:43,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 16:11:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 16:11:43,258 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) [2021-12-17 16:11:43,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 16:11:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:11:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 16:11:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 16:11:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:11:43,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 16:11:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 16:11:43,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013567787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 16:11:43,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 16:11:43,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-17 16:11:43,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189288604] [2021-12-17 16:11:43,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 16:11:43,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 16:11:43,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:11:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 16:11:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 16:11:43,896 INFO L87 Difference]: Start difference. First operand 7823 states and 11586 transitions. Second operand has 14 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:11:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:11:57,750 INFO L93 Difference]: Finished difference Result 164215 states and 240340 transitions. [2021-12-17 16:11:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-17 16:11:57,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 0 states have call successors, (0), 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 79 [2021-12-17 16:11:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:11:58,113 INFO L225 Difference]: With dead ends: 164215 [2021-12-17 16:11:58,113 INFO L226 Difference]: Without dead ends: 156421 [2021-12-17 16:11:58,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8254 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3357, Invalid=15275, Unknown=0, NotChecked=0, Total=18632 [2021-12-17 16:11:58,167 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 12623 mSDsluCounter, 3037 mSDsCounter, 0 mSdLazyCounter, 3330 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12623 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 3603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 3330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 16:11:58,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12623 Valid, 3683 Invalid, 3603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 3330 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 16:11:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156421 states. [2021-12-17 16:12:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156421 to 53371. [2021-12-17 16:12:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53371 states, 53370 states have (on average 1.4388233089750797) internal successors, (76790), 53370 states have internal predecessors, (76790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53371 states to 53371 states and 76790 transitions. [2021-12-17 16:12:02,683 INFO L78 Accepts]: Start accepts. Automaton has 53371 states and 76790 transitions. Word has length 79 [2021-12-17 16:12:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 53371 states and 76790 transitions. [2021-12-17 16:12:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.071428571428573) internal successors, (225), 14 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 53371 states and 76790 transitions. [2021-12-17 16:12:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 16:12:02,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:02,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:12:02,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 16:12:02,895 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 [2021-12-17 16:12:02,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2142394861, now seen corresponding path program 1 times [2021-12-17 16:12:02,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734648506] [2021-12-17 16:12:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:02,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734648506] [2021-12-17 16:12:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734648506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:02,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:02,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:02,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547747924] [2021-12-17 16:12:02,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:02,939 INFO L87 Difference]: Start difference. First operand 53371 states and 76790 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 16:12:07,731 INFO L93 Difference]: Finished difference Result 124568 states and 179682 transitions. [2021-12-17 16:12:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 16:12:07,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 16:12:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 16:12:07,862 INFO L225 Difference]: With dead ends: 124568 [2021-12-17 16:12:07,862 INFO L226 Difference]: Without dead ends: 82174 [2021-12-17 16:12:07,910 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 [2021-12-17 16:12:07,911 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 93 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 16:12:07,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 383 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 16:12:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82174 states. [2021-12-17 16:12:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82174 to 82172. [2021-12-17 16:12:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82172 states, 82171 states have (on average 1.426878095678524) internal successors, (117248), 82171 states have internal predecessors, (117248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82172 states to 82172 states and 117248 transitions. [2021-12-17 16:12:13,517 INFO L78 Accepts]: Start accepts. Automaton has 82172 states and 117248 transitions. Word has length 79 [2021-12-17 16:12:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 16:12:13,517 INFO L470 AbstractCegarLoop]: Abstraction has 82172 states and 117248 transitions. [2021-12-17 16:12:13,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 16:12:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 82172 states and 117248 transitions. [2021-12-17 16:12:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 16:12:13,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 16:12:13,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 16:12:13,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 16:12:13,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 16:12:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 16:12:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1807198399, now seen corresponding path program 1 times [2021-12-17 16:12:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 16:12:13,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787688920] [2021-12-17 16:12:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 16:12:13,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 16:12:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 16:12:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 16:12:13,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 16:12:13,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787688920] [2021-12-17 16:12:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787688920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 16:12:13,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 16:12:13,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 16:12:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580076009] [2021-12-17 16:12:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 16:12:13,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 16:12:13,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 16:12:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 16:12:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 16:12:13,566 INFO L87 Difference]: Start difference. First operand 82172 states and 117248 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)