./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/pals_lcr.3.1.ufo.UNBOUNDED.pals.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 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:16:13,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:16:13,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:16:13,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:16:13,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:16:13,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:16:13,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:16:13,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:16:13,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:16:13,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:16:13,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:16:13,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:16:13,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:16:13,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:16:13,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:16:13,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:16:13,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:16:13,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:16:13,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:16:13,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:16:13,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:16:13,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:16:13,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:16:13,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:16:13,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:16:13,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:16:13,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:16:13,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:16:13,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:16:13,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:16:13,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:16:13,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:16:13,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:16:13,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:16:13,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:16:13,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:16:13,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:16:13,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:16:13,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:16:13,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:16:13,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:16:13,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:16:13,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:16:13,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:16:13,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:16:13,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:16:13,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:16:13,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:16:13,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:16:13,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:16:13,653 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:16:13,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:16:13,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:16:13,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:16:13,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:16:13,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:16:13,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:16:13,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:16:13,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:16:13,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:16:13,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:16:13,658 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:16:13,658 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:16:13,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:16:13,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:16:13,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 [2021-12-15 11:16:13,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:16:13,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:16:13,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:16:13,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:16:13,904 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:16:13,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:16:13,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bfa00ded/e32f0d10c9b3463bb84e06b5b91c5456/FLAG88b829681 [2021-12-15 11:16:14,263 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:16:14,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:16:14,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bfa00ded/e32f0d10c9b3463bb84e06b5b91c5456/FLAG88b829681 [2021-12-15 11:16:14,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bfa00ded/e32f0d10c9b3463bb84e06b5b91c5456 [2021-12-15 11:16:14,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:16:14,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:16:14,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:16:14,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:16:14,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:16:14,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:16:14" (1/1) ... [2021-12-15 11:16:14,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44cd60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:14, skipping insertion in model container [2021-12-15 11:16:14,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:16:14" (1/1) ... [2021-12-15 11:16:14,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:16:14,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:16:14,963 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/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-12-15 11:16:14,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:16:14,971 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:16:15,001 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/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-12-15 11:16:15,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:16:15,014 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:16:15,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15 WrapperNode [2021-12-15 11:16:15,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:16:15,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:16:15,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:16:15,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:16:15,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,042 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 220 [2021-12-15 11:16:15,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:16:15,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:16:15,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:16:15,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:16:15,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:16:15,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:16:15,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:16:15,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:16:15,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (1/1) ... [2021-12-15 11:16:15,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:16:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:15,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:16:15,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:16:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:16:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:16:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:16:15,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:16:15,221 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:16:15,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:16:15,485 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:16:15,490 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:16:15,491 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:16:15,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:16:15 BoogieIcfgContainer [2021-12-15 11:16:15,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:16:15,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:16:15,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:16:15,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:16:15,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:16:14" (1/3) ... [2021-12-15 11:16:15,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e84f1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:16:15, skipping insertion in model container [2021-12-15 11:16:15,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:16:15" (2/3) ... [2021-12-15 11:16:15,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e84f1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:16:15, skipping insertion in model container [2021-12-15 11:16:15,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:16:15" (3/3) ... [2021-12-15 11:16:15,499 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-12-15 11:16:15,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:16:15,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:16:15,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:16:15,544 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:16:15,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:16:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 11:16:15,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:15,559 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] [2021-12-15 11:16:15,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2021-12-15 11:16:15,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133656885] [2021-12-15 11:16:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:15,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:15,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:15,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133656885] [2021-12-15 11:16:15,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133656885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:15,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:15,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:16:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234996702] [2021-12-15 11:16:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:15,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:16:15,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:16:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:16:15,755 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 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 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:15,778 INFO L93 Difference]: Finished difference Result 103 states and 167 transitions. [2021-12-15 11:16:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:16:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 11:16:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:15,787 INFO L225 Difference]: With dead ends: 103 [2021-12-15 11:16:15,787 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 11:16:15,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:16:15,793 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:15,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 11:16:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-15 11:16:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2021-12-15 11:16:15,827 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 25 [2021-12-15 11:16:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:15,828 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2021-12-15 11:16:15,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2021-12-15 11:16:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 11:16:15,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:15,829 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] [2021-12-15 11:16:15,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:16:15,830 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2021-12-15 11:16:15,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551193237] [2021-12-15 11:16:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:15,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:15,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:15,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551193237] [2021-12-15 11:16:15,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551193237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:15,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:15,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604013335] [2021-12-15 11:16:15,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:15,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:15,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:15,972 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,041 INFO L93 Difference]: Finished difference Result 102 states and 160 transitions. [2021-12-15 11:16:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 11:16:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,043 INFO L225 Difference]: With dead ends: 102 [2021-12-15 11:16:16,043 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 11:16:16,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:16,047 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:16,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 361 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 11:16:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-15 11:16:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-12-15 11:16:16,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 25 [2021-12-15 11:16:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-12-15 11:16:16,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-12-15 11:16:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:16,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:16:16,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2021-12-15 11:16:16,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611875855] [2021-12-15 11:16:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611875855] [2021-12-15 11:16:16,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611875855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:16,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977284879] [2021-12-15 11:16:16,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:16,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,128 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,143 INFO L93 Difference]: Finished difference Result 130 states and 189 transitions. [2021-12-15 11:16:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 11:16:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,144 INFO L225 Difference]: With dead ends: 130 [2021-12-15 11:16:16,144 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 11:16:16,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,145 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 171 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 [2021-12-15 11:16:16,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 11:16:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-12-15 11:16:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2021-12-15 11:16:16,157 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 40 [2021-12-15 11:16:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,158 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2021-12-15 11:16:16,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2021-12-15 11:16:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:16,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:16:16,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2021-12-15 11:16:16,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533941911] [2021-12-15 11:16:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533941911] [2021-12-15 11:16:16,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533941911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:16,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442595472] [2021-12-15 11:16:16,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:16,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,202 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,215 INFO L93 Difference]: Finished difference Result 214 states and 320 transitions. [2021-12-15 11:16:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 11:16:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,233 INFO L225 Difference]: With dead ends: 214 [2021-12-15 11:16:16,233 INFO L226 Difference]: Without dead ends: 146 [2021-12-15 11:16:16,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,234 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 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 [2021-12-15 11:16:16,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-15 11:16:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-12-15 11:16:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2021-12-15 11:16:16,244 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 40 [2021-12-15 11:16:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2021-12-15 11:16:16,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2021-12-15 11:16:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:16:16,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:16:16,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2021-12-15 11:16:16,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752840790] [2021-12-15 11:16:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752840790] [2021-12-15 11:16:16,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752840790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:16,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44217615] [2021-12-15 11:16:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:16,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:16,303 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,394 INFO L93 Difference]: Finished difference Result 876 states and 1345 transitions. [2021-12-15 11:16:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:16:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 11:16:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,398 INFO L225 Difference]: With dead ends: 876 [2021-12-15 11:16:16,398 INFO L226 Difference]: Without dead ends: 754 [2021-12-15 11:16:16,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:16:16,399 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 376 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:16,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 495 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-15 11:16:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 264. [2021-12-15 11:16:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 263 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 391 transitions. [2021-12-15 11:16:16,429 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 391 transitions. Word has length 40 [2021-12-15 11:16:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,429 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 391 transitions. [2021-12-15 11:16:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 391 transitions. [2021-12-15 11:16:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:16:16,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,431 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] [2021-12-15 11:16:16,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:16:16,431 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2021-12-15 11:16:16,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695830740] [2021-12-15 11:16:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695830740] [2021-12-15 11:16:16,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695830740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:16,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015939954] [2021-12-15 11:16:16,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:16,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,469 INFO L87 Difference]: Start difference. First operand 264 states and 391 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,492 INFO L93 Difference]: Finished difference Result 704 states and 1053 transitions. [2021-12-15 11:16:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:16:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,494 INFO L225 Difference]: With dead ends: 704 [2021-12-15 11:16:16,494 INFO L226 Difference]: Without dead ends: 462 [2021-12-15 11:16:16,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,496 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:16,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-15 11:16:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 452. [2021-12-15 11:16:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.4523281596452329) internal successors, (655), 451 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 655 transitions. [2021-12-15 11:16:16,514 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 655 transitions. Word has length 42 [2021-12-15 11:16:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,514 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 655 transitions. [2021-12-15 11:16:16,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 655 transitions. [2021-12-15 11:16:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:16:16,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,515 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] [2021-12-15 11:16:16,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:16:16,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2021-12-15 11:16:16,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370437011] [2021-12-15 11:16:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370437011] [2021-12-15 11:16:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370437011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486358362] [2021-12-15 11:16:16,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:16,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:16,614 INFO L87 Difference]: Start difference. First operand 452 states and 655 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,683 INFO L93 Difference]: Finished difference Result 884 states and 1289 transitions. [2021-12-15 11:16:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 11:16:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,687 INFO L225 Difference]: With dead ends: 884 [2021-12-15 11:16:16,687 INFO L226 Difference]: Without dead ends: 454 [2021-12-15 11:16:16,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:16,692 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 168 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:16,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 187 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-15 11:16:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2021-12-15 11:16:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.434589800443459) internal successors, (647), 451 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 647 transitions. [2021-12-15 11:16:16,710 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 647 transitions. Word has length 42 [2021-12-15 11:16:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,711 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 647 transitions. [2021-12-15 11:16:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 647 transitions. [2021-12-15 11:16:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:16:16,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:16:16,717 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2021-12-15 11:16:16,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633493451] [2021-12-15 11:16:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633493451] [2021-12-15 11:16:16,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633493451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:16,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133047448] [2021-12-15 11:16:16,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:16,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:16,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:16,772 INFO L87 Difference]: Start difference. First operand 452 states and 647 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,822 INFO L93 Difference]: Finished difference Result 786 states and 1119 transitions. [2021-12-15 11:16:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:16:16,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-15 11:16:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,825 INFO L225 Difference]: With dead ends: 786 [2021-12-15 11:16:16,825 INFO L226 Difference]: Without dead ends: 784 [2021-12-15 11:16:16,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:16:16,826 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:16,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 362 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-15 11:16:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 476. [2021-12-15 11:16:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.4042105263157896) internal successors, (667), 475 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 667 transitions. [2021-12-15 11:16:16,842 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 667 transitions. Word has length 43 [2021-12-15 11:16:16,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,842 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 667 transitions. [2021-12-15 11:16:16,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 667 transitions. [2021-12-15 11:16:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 11:16:16,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:16:16,843 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2021-12-15 11:16:16,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903745265] [2021-12-15 11:16:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:16,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903745265] [2021-12-15 11:16:16,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903745265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:16,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763820999] [2021-12-15 11:16:16,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:16,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:16,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,866 INFO L87 Difference]: Start difference. First operand 476 states and 667 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:16,896 INFO L93 Difference]: Finished difference Result 947 states and 1345 transitions. [2021-12-15 11:16:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:16,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 11:16:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:16,899 INFO L225 Difference]: With dead ends: 947 [2021-12-15 11:16:16,899 INFO L226 Difference]: Without dead ends: 680 [2021-12-15 11:16:16,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:16,900 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 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 [2021-12-15 11:16:16,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-15 11:16:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 678. [2021-12-15 11:16:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.395864106351551) internal successors, (945), 677 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 945 transitions. [2021-12-15 11:16:16,920 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 945 transitions. Word has length 44 [2021-12-15 11:16:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 945 transitions. [2021-12-15 11:16:16,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 945 transitions. [2021-12-15 11:16:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:16:16,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:16,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:16,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:16:16,922 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:16,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1290367787, now seen corresponding path program 1 times [2021-12-15 11:16:16,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753218050] [2021-12-15 11:16:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:16,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:16:16,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753218050] [2021-12-15 11:16:16,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753218050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:16,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:16,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868498504] [2021-12-15 11:16:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:16,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:16,963 INFO L87 Difference]: Start difference. First operand 678 states and 945 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:17,047 INFO L93 Difference]: Finished difference Result 2782 states and 3897 transitions. [2021-12-15 11:16:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 11:16:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:17,053 INFO L225 Difference]: With dead ends: 2782 [2021-12-15 11:16:17,053 INFO L226 Difference]: Without dead ends: 2128 [2021-12-15 11:16:17,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:17,055 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 206 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:17,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 327 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-12-15 11:16:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1330. [2021-12-15 11:16:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 1.3942814145974416) internal successors, (1853), 1329 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1853 transitions. [2021-12-15 11:16:17,112 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1853 transitions. Word has length 63 [2021-12-15 11:16:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:17,112 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1853 transitions. [2021-12-15 11:16:17,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1853 transitions. [2021-12-15 11:16:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:16:17,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:17,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:17,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:16:17,114 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash -478415029, now seen corresponding path program 1 times [2021-12-15 11:16:17,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:17,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211195991] [2021-12-15 11:16:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:17,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:16:17,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211195991] [2021-12-15 11:16:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211195991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:17,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:17,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:17,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040857503] [2021-12-15 11:16:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:17,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:17,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:17,168 INFO L87 Difference]: Start difference. First operand 1330 states and 1853 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:17,293 INFO L93 Difference]: Finished difference Result 3434 states and 4805 transitions. [2021-12-15 11:16:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 11:16:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:17,300 INFO L225 Difference]: With dead ends: 3434 [2021-12-15 11:16:17,301 INFO L226 Difference]: Without dead ends: 2780 [2021-12-15 11:16:17,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:17,302 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 200 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:17,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 342 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-12-15 11:16:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2310. [2021-12-15 11:16:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 2309 states have (on average 1.3880467734950195) internal successors, (3205), 2309 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3205 transitions. [2021-12-15 11:16:17,373 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3205 transitions. Word has length 63 [2021-12-15 11:16:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 2310 states and 3205 transitions. [2021-12-15 11:16:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3205 transitions. [2021-12-15 11:16:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:16:17,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:17,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:17,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:16:17,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1743655043, now seen corresponding path program 1 times [2021-12-15 11:16:17,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650781875] [2021-12-15 11:16:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:17,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:17,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650781875] [2021-12-15 11:16:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650781875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:17,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:17,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478100327] [2021-12-15 11:16:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:17,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:17,418 INFO L87 Difference]: Start difference. First operand 2310 states and 3205 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:17,472 INFO L93 Difference]: Finished difference Result 3960 states and 5529 transitions. [2021-12-15 11:16:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-15 11:16:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:17,477 INFO L225 Difference]: With dead ends: 3960 [2021-12-15 11:16:17,477 INFO L226 Difference]: Without dead ends: 1674 [2021-12-15 11:16:17,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:17,480 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:17,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 170 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-12-15 11:16:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1672. [2021-12-15 11:16:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.3871932974266905) internal successors, (2318), 1671 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2318 transitions. [2021-12-15 11:16:17,535 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2318 transitions. Word has length 65 [2021-12-15 11:16:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:17,536 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2318 transitions. [2021-12-15 11:16:17,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2318 transitions. [2021-12-15 11:16:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:16:17,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:17,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:17,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:16:17,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1575580592, now seen corresponding path program 1 times [2021-12-15 11:16:17,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157943019] [2021-12-15 11:16:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:17,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:17,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157943019] [2021-12-15 11:16:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157943019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:17,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:17,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:17,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669441068] [2021-12-15 11:16:17,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:16:17,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:16:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:16:17,573 INFO L87 Difference]: Start difference. First operand 1672 states and 2318 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:17,667 INFO L93 Difference]: Finished difference Result 3072 states and 4290 transitions. [2021-12-15 11:16:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:16:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 65 [2021-12-15 11:16:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:17,673 INFO L225 Difference]: With dead ends: 3072 [2021-12-15 11:16:17,673 INFO L226 Difference]: Without dead ends: 2606 [2021-12-15 11:16:17,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:16:17,675 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 199 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:17,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 318 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-12-15 11:16:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2136. [2021-12-15 11:16:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 1.3892271662763467) internal successors, (2966), 2135 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2966 transitions. [2021-12-15 11:16:17,732 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2966 transitions. Word has length 65 [2021-12-15 11:16:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:17,732 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 2966 transitions. [2021-12-15 11:16:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2966 transitions. [2021-12-15 11:16:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:16:17,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:17,733 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] [2021-12-15 11:16:17,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:16:17,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1779322747, now seen corresponding path program 1 times [2021-12-15 11:16:17,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955038510] [2021-12-15 11:16:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:17,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:17,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955038510] [2021-12-15 11:16:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955038510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520493812] [2021-12-15 11:16:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:17,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:17,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:17,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:16:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 11:16:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:16:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:16:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:16:18,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520493812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:16:18,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:16:18,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-15 11:16:18,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032706841] [2021-12-15 11:16:18,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:16:18,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 11:16:18,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 11:16:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-15 11:16:18,381 INFO L87 Difference]: Start difference. First operand 2136 states and 2966 transitions. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:20,380 INFO L93 Difference]: Finished difference Result 17341 states and 23714 transitions. [2021-12-15 11:16:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 11:16:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 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 66 [2021-12-15 11:16:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:20,434 INFO L225 Difference]: With dead ends: 17341 [2021-12-15 11:16:20,435 INFO L226 Difference]: Without dead ends: 15251 [2021-12-15 11:16:20,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=2844, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 11:16:20,444 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1606 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:20,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1606 Valid, 979 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:16:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15251 states. [2021-12-15 11:16:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15251 to 9811. [2021-12-15 11:16:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 9810 states have (on average 1.3190621814475025) internal successors, (12940), 9810 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12940 transitions. [2021-12-15 11:16:20,940 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12940 transitions. Word has length 66 [2021-12-15 11:16:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:20,940 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12940 transitions. [2021-12-15 11:16:20,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12940 transitions. [2021-12-15 11:16:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:20,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:20,942 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] [2021-12-15 11:16:20,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 11:16:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 11:16:21,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 641299560, now seen corresponding path program 1 times [2021-12-15 11:16:21,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295531557] [2021-12-15 11:16:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:21,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295531557] [2021-12-15 11:16:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295531557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136943681] [2021-12-15 11:16:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:21,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:21,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:21,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 11:16:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 11:16:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:16:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:21,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:16:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:22,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136943681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:16:22,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:16:22,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-15 11:16:22,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717192294] [2021-12-15 11:16:22,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:16:22,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 11:16:22,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 11:16:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:16:22,478 INFO L87 Difference]: Start difference. First operand 9811 states and 12940 transitions. Second operand has 25 states, 25 states have (on average 7.28) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:35,893 INFO L93 Difference]: Finished difference Result 166117 states and 216075 transitions. [2021-12-15 11:16:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-12-15 11:16:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.28) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 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 67 [2021-12-15 11:16:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:36,356 INFO L225 Difference]: With dead ends: 166117 [2021-12-15 11:16:36,357 INFO L226 Difference]: Without dead ends: 157453 [2021-12-15 11:16:36,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19665 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6107, Invalid=44743, Unknown=0, NotChecked=0, Total=50850 [2021-12-15 11:16:36,452 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 6352 mSDsluCounter, 3628 mSDsCounter, 0 mSdLazyCounter, 3332 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6352 SdHoareTripleChecker+Valid, 3935 SdHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 3332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:36,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6352 Valid, 3935 Invalid, 3884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 3332 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 11:16:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157453 states. [2021-12-15 11:16:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157453 to 52506. [2021-12-15 11:16:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52506 states, 52505 states have (on average 1.3112275021426532) internal successors, (68846), 52505 states have internal predecessors, (68846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52506 states to 52506 states and 68846 transitions. [2021-12-15 11:16:40,114 INFO L78 Accepts]: Start accepts. Automaton has 52506 states and 68846 transitions. Word has length 67 [2021-12-15 11:16:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:40,114 INFO L470 AbstractCegarLoop]: Abstraction has 52506 states and 68846 transitions. [2021-12-15 11:16:40,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.28) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 52506 states and 68846 transitions. [2021-12-15 11:16:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:40,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:40,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:40,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 11:16:40,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 11:16:40,333 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash -162688112, now seen corresponding path program 1 times [2021-12-15 11:16:40,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:40,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885055377] [2021-12-15 11:16:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:40,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:40,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885055377] [2021-12-15 11:16:40,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885055377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:40,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:40,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:40,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231365444] [2021-12-15 11:16:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:40,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:40,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:40,373 INFO L87 Difference]: Start difference. First operand 52506 states and 68846 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:42,136 INFO L93 Difference]: Finished difference Result 76944 states and 100389 transitions. [2021-12-15 11:16:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 11:16:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:42,237 INFO L225 Difference]: With dead ends: 76944 [2021-12-15 11:16:42,238 INFO L226 Difference]: Without dead ends: 29864 [2021-12-15 11:16:42,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:42,301 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:42,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 152 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29864 states. [2021-12-15 11:16:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29864 to 29436. [2021-12-15 11:16:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29436 states, 29435 states have (on average 1.2717513164599965) internal successors, (37434), 29435 states have internal predecessors, (37434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29436 states to 29436 states and 37434 transitions. [2021-12-15 11:16:43,779 INFO L78 Accepts]: Start accepts. Automaton has 29436 states and 37434 transitions. Word has length 67 [2021-12-15 11:16:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 29436 states and 37434 transitions. [2021-12-15 11:16:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29436 states and 37434 transitions. [2021-12-15 11:16:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:43,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:43,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:43,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:16:43,785 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:43,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1410195728, now seen corresponding path program 1 times [2021-12-15 11:16:43,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:43,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953581854] [2021-12-15 11:16:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:43,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:43,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:43,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953581854] [2021-12-15 11:16:43,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953581854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:43,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:43,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:16:43,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591072376] [2021-12-15 11:16:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:43,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:16:43,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:16:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:43,814 INFO L87 Difference]: Start difference. First operand 29436 states and 37434 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:44,602 INFO L93 Difference]: Finished difference Result 45422 states and 57648 transitions. [2021-12-15 11:16:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:16:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 11:16:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:44,630 INFO L225 Difference]: With dead ends: 45422 [2021-12-15 11:16:44,630 INFO L226 Difference]: Without dead ends: 19358 [2021-12-15 11:16:44,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:16:44,654 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 20 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:44,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19358 states. [2021-12-15 11:16:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19358 to 19356. [2021-12-15 11:16:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19356 states, 19355 states have (on average 1.2396280030999742) internal successors, (23993), 19355 states have internal predecessors, (23993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19356 states to 19356 states and 23993 transitions. [2021-12-15 11:16:45,662 INFO L78 Accepts]: Start accepts. Automaton has 19356 states and 23993 transitions. Word has length 67 [2021-12-15 11:16:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:45,662 INFO L470 AbstractCegarLoop]: Abstraction has 19356 states and 23993 transitions. [2021-12-15 11:16:45,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 19356 states and 23993 transitions. [2021-12-15 11:16:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:45,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:45,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:16:45,665 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1335056548, now seen corresponding path program 1 times [2021-12-15 11:16:45,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:45,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000887216] [2021-12-15 11:16:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:45,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 11:16:45,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000887216] [2021-12-15 11:16:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000887216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:45,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:45,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:45,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258613859] [2021-12-15 11:16:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:16:45,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:16:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:45,702 INFO L87 Difference]: Start difference. First operand 19356 states and 23993 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:46,298 INFO L93 Difference]: Finished difference Result 29167 states and 36357 transitions. [2021-12-15 11:16:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:16:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 67 [2021-12-15 11:16:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:46,309 INFO L225 Difference]: With dead ends: 29167 [2021-12-15 11:16:46,309 INFO L226 Difference]: Without dead ends: 9920 [2021-12-15 11:16:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:16:46,318 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 191 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:46,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 90 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2021-12-15 11:16:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 9920. [2021-12-15 11:16:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9920 states, 9919 states have (on average 1.2315757636858555) internal successors, (12216), 9919 states have internal predecessors, (12216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 12216 transitions. [2021-12-15 11:16:46,691 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 12216 transitions. Word has length 67 [2021-12-15 11:16:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:46,691 INFO L470 AbstractCegarLoop]: Abstraction has 9920 states and 12216 transitions. [2021-12-15 11:16:46,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 12216 transitions. [2021-12-15 11:16:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:46,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:46,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:46,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:16:46,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1068926620, now seen corresponding path program 1 times [2021-12-15 11:16:46,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:46,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834026689] [2021-12-15 11:16:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:46,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 11:16:46,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834026689] [2021-12-15 11:16:46,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834026689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:46,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:46,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:46,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818882229] [2021-12-15 11:16:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:46,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:16:46,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:16:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:46,728 INFO L87 Difference]: Start difference. First operand 9920 states and 12216 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:47,050 INFO L93 Difference]: Finished difference Result 17209 states and 21227 transitions. [2021-12-15 11:16:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:16:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 67 [2021-12-15 11:16:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:47,058 INFO L225 Difference]: With dead ends: 17209 [2021-12-15 11:16:47,058 INFO L226 Difference]: Without dead ends: 7408 [2021-12-15 11:16:47,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:16:47,065 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 197 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:47,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7408 states. [2021-12-15 11:16:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7408 to 7408. [2021-12-15 11:16:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7408 states, 7407 states have (on average 1.2111516133387337) internal successors, (8971), 7407 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7408 states to 7408 states and 8971 transitions. [2021-12-15 11:16:47,462 INFO L78 Accepts]: Start accepts. Automaton has 7408 states and 8971 transitions. Word has length 67 [2021-12-15 11:16:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:47,463 INFO L470 AbstractCegarLoop]: Abstraction has 7408 states and 8971 transitions. [2021-12-15 11:16:47,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7408 states and 8971 transitions. [2021-12-15 11:16:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:16:47,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:47,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:47,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:16:47,465 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -509283972, now seen corresponding path program 1 times [2021-12-15 11:16:47,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:47,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053099700] [2021-12-15 11:16:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:47,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 11:16:47,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:47,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053099700] [2021-12-15 11:16:47,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053099700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:16:47,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:16:47,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:16:47,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171838281] [2021-12-15 11:16:47,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:16:47,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:16:47,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:16:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:16:47,496 INFO L87 Difference]: Start difference. First operand 7408 states and 8971 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:47,982 INFO L93 Difference]: Finished difference Result 18717 states and 22872 transitions. [2021-12-15 11:16:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:16:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-15 11:16:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:47,996 INFO L225 Difference]: With dead ends: 18717 [2021-12-15 11:16:47,996 INFO L226 Difference]: Without dead ends: 11367 [2021-12-15 11:16:48,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:16:48,004 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 331 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:48,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 156 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:16:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2021-12-15 11:16:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 10501. [2021-12-15 11:16:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 10500 states have (on average 1.2077142857142857) internal successors, (12681), 10500 states have internal predecessors, (12681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 12681 transitions. [2021-12-15 11:16:48,531 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 12681 transitions. Word has length 67 [2021-12-15 11:16:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 12681 transitions. [2021-12-15 11:16:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 12681 transitions. [2021-12-15 11:16:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:16:48,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:48,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:16:48,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:16:48,533 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1730655410, now seen corresponding path program 1 times [2021-12-15 11:16:48,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:48,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747907464] [2021-12-15 11:16:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:48,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:49,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747907464] [2021-12-15 11:16:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747907464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53007477] [2021-12-15 11:16:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:49,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:49,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:49,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 11:16:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:49,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 11:16:49,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:16:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:50,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:16:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53007477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:16:51,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:16:51,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 45 [2021-12-15 11:16:51,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3180744] [2021-12-15 11:16:51,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:16:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 11:16:51,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:16:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 11:16:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 11:16:51,111 INFO L87 Difference]: Start difference. First operand 10501 states and 12681 transitions. Second operand has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:16:58,388 INFO L93 Difference]: Finished difference Result 29474 states and 36054 transitions. [2021-12-15 11:16:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-15 11:16:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 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 68 [2021-12-15 11:16:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:16:58,423 INFO L225 Difference]: With dead ends: 29474 [2021-12-15 11:16:58,423 INFO L226 Difference]: Without dead ends: 23974 [2021-12-15 11:16:58,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2021-12-15 11:16:58,441 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 2903 mSDsluCounter, 6044 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2903 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:16:58,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2903 Valid, 6314 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 11:16:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23974 states. [2021-12-15 11:16:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23974 to 9682. [2021-12-15 11:16:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9682 states, 9681 states have (on average 1.2080363598801778) internal successors, (11695), 9681 states have internal predecessors, (11695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9682 states to 9682 states and 11695 transitions. [2021-12-15 11:16:59,281 INFO L78 Accepts]: Start accepts. Automaton has 9682 states and 11695 transitions. Word has length 68 [2021-12-15 11:16:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:16:59,281 INFO L470 AbstractCegarLoop]: Abstraction has 9682 states and 11695 transitions. [2021-12-15 11:16:59,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.044444444444444) internal successors, (182), 45 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:16:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states and 11695 transitions. [2021-12-15 11:16:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:16:59,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:16:59,284 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] [2021-12-15 11:16:59,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 11:16:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:59,494 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:16:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:16:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1259974721, now seen corresponding path program 1 times [2021-12-15 11:16:59,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:16:59,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375033717] [2021-12-15 11:16:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:59,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:16:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:16:59,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:16:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375033717] [2021-12-15 11:16:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375033717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:16:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863733831] [2021-12-15 11:16:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:16:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:16:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:16:59,766 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:16:59,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 11:16:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:16:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 11:16:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:17:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:00,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:17:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:01,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863733831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:17:01,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:17:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 38 [2021-12-15 11:17:01,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150293995] [2021-12-15 11:17:01,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:17:01,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 11:17:01,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 11:17:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 11:17:01,814 INFO L87 Difference]: Start difference. First operand 9682 states and 11695 transitions. Second operand has 38 states, 38 states have (on average 4.921052631578948) internal successors, (187), 38 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:04,522 INFO L93 Difference]: Finished difference Result 19414 states and 23373 transitions. [2021-12-15 11:17:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 11:17:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.921052631578948) internal successors, (187), 38 states have internal predecessors, (187), 0 states have call successors, (0), 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 69 [2021-12-15 11:17:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:04,541 INFO L225 Difference]: With dead ends: 19414 [2021-12-15 11:17:04,542 INFO L226 Difference]: Without dead ends: 14217 [2021-12-15 11:17:04,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=976, Invalid=4426, Unknown=0, NotChecked=0, Total=5402 [2021-12-15 11:17:04,549 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2586 mSDsluCounter, 2535 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 2698 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:04,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2586 Valid, 2698 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 11:17:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14217 states. [2021-12-15 11:17:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14217 to 5906. [2021-12-15 11:17:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5906 states, 5905 states have (on average 1.2208298052497883) internal successors, (7209), 5905 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5906 states to 5906 states and 7209 transitions. [2021-12-15 11:17:04,938 INFO L78 Accepts]: Start accepts. Automaton has 5906 states and 7209 transitions. Word has length 69 [2021-12-15 11:17:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:04,938 INFO L470 AbstractCegarLoop]: Abstraction has 5906 states and 7209 transitions. [2021-12-15 11:17:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.921052631578948) internal successors, (187), 38 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5906 states and 7209 transitions. [2021-12-15 11:17:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:17:04,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:04,939 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] [2021-12-15 11:17:04,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 11:17:05,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:17:05,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1362769912, now seen corresponding path program 1 times [2021-12-15 11:17:05,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:05,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958832385] [2021-12-15 11:17:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:05,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:05,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:05,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958832385] [2021-12-15 11:17:05,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958832385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:17:05,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761310667] [2021-12-15 11:17:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:05,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:17:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:17:05,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:17:05,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 11:17:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 11:17:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:17:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:06,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:17:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761310667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:17:07,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:17:07,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2021-12-15 11:17:07,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388850184] [2021-12-15 11:17:07,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:17:07,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 11:17:07,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:17:07,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 11:17:07,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-12-15 11:17:07,566 INFO L87 Difference]: Start difference. First operand 5906 states and 7209 transitions. Second operand has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:17:10,272 INFO L93 Difference]: Finished difference Result 12672 states and 15302 transitions. [2021-12-15 11:17:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 11:17:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 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 70 [2021-12-15 11:17:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:17:10,284 INFO L225 Difference]: With dead ends: 12672 [2021-12-15 11:17:10,284 INFO L226 Difference]: Without dead ends: 9884 [2021-12-15 11:17:10,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=551, Invalid=2101, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 11:17:10,289 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 1073 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:17:10,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 1678 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:17:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2021-12-15 11:17:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 4734. [2021-12-15 11:17:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4734 states, 4733 states have (on average 1.2178322417071625) internal successors, (5764), 4733 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4734 states to 4734 states and 5764 transitions. [2021-12-15 11:17:10,655 INFO L78 Accepts]: Start accepts. Automaton has 4734 states and 5764 transitions. Word has length 70 [2021-12-15 11:17:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:17:10,655 INFO L470 AbstractCegarLoop]: Abstraction has 4734 states and 5764 transitions. [2021-12-15 11:17:10,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.133333333333334) internal successors, (184), 30 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:17:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4734 states and 5764 transitions. [2021-12-15 11:17:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 11:17:10,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:17:10,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:17:10,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 11:17:10,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 11:17:10,871 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:17:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:17:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -375920816, now seen corresponding path program 1 times [2021-12-15 11:17:10,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:17:10,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251918750] [2021-12-15 11:17:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:10,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:17:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:17:11,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:17:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251918750] [2021-12-15 11:17:11,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251918750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:17:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73158010] [2021-12-15 11:17:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:17:11,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:17:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:17:11,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:17:11,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 11:17:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:17:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 11:17:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates...