./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.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 e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:56:15,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:56:15,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:56:15,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:56:15,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:56:15,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:56:15,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:56:15,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:56:15,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:56:15,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:56:15,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:56:15,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:56:15,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:56:15,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:56:15,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:56:15,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:56:15,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:56:15,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:56:15,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:56:15,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:56:15,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:56:15,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:56:15,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:56:15,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:56:15,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:56:15,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:56:15,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:56:15,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:56:15,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:56:15,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:56:15,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:56:15,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:56:15,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:56:15,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:56:15,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:56:15,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:56:15,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:56:15,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:56:15,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:56:15,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:56:15,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:56:15,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:56:15,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:56:15,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:56:15,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:56:15,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:56:15,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:56:15,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:56:15,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:56:15,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:56:15,768 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:56:15,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:56:15,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:56:15,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:56:15,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:56:15,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:56:15,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:56:15,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:56:15,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:56:15,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:56:15,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:56:15,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:56:15,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:56:15,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:56:15,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:56:15,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:56:15,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:56:15,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:56:15,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:56:15,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:56:15,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:56:15,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f [2021-12-17 20:56:15,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:56:15,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:56:15,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:56:15,994 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:56:15,994 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:56:15,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-17 20:56:16,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8467e8a/f274bcb4625e465e8581f0cc19d24fb2/FLAG0874cbc64 [2021-12-17 20:56:16,631 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:56:16,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-17 20:56:16,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8467e8a/f274bcb4625e465e8581f0cc19d24fb2/FLAG0874cbc64 [2021-12-17 20:56:17,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8467e8a/f274bcb4625e465e8581f0cc19d24fb2 [2021-12-17 20:56:17,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:56:17,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:56:17,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:56:17,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:56:17,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:56:17,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:56:17" (1/1) ... [2021-12-17 20:56:17,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@887ccfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:17, skipping insertion in model container [2021-12-17 20:56:17,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:56:17" (1/1) ... [2021-12-17 20:56:17,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:56:17,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:56:17,487 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-17 20:56:17,516 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-17 20:56:17,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:56:17,955 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:56:17,990 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-17 20:56:17,995 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/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-17 20:56:18,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:56:18,304 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:56:18,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18 WrapperNode [2021-12-17 20:56:18,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:56:18,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:56:18,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:56:18,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:56:18,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,563 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-12-17 20:56:18,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:56:18,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:56:18,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:56:18,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:56:18,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:18,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:56:19,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:56:19,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:56:19,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:56:19,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (1/1) ... [2021-12-17 20:56:19,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:56:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:56:19,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 20:56:19,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 20:56:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:56:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:56:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:56:19,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:56:19,279 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:56:19,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:56:21,958 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:56:21,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:56:21,970 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:56:21,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:56:21 BoogieIcfgContainer [2021-12-17 20:56:21,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:56:21,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:56:21,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:56:21,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:56:21,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:56:17" (1/3) ... [2021-12-17 20:56:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a511ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:56:21, skipping insertion in model container [2021-12-17 20:56:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:56:18" (2/3) ... [2021-12-17 20:56:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a511ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:56:21, skipping insertion in model container [2021-12-17 20:56:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:56:21" (3/3) ... [2021-12-17 20:56:21,979 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-17 20:56:21,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:56:21,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:56:22,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:56:22,022 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 20:56:22,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:56:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 20:56:22,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:22,052 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] [2021-12-17 20:56:22,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1041827451, now seen corresponding path program 1 times [2021-12-17 20:56:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:22,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930499881] [2021-12-17 20:56:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:22,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:22,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930499881] [2021-12-17 20:56:22,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930499881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:22,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:22,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:56:22,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076816809] [2021-12-17 20:56:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:22,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:22,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:22,256 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,020 INFO L93 Difference]: Finished difference Result 2563 states and 4924 transitions. [2021-12-17 20:56:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-17 20:56:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,043 INFO L225 Difference]: With dead ends: 2563 [2021-12-17 20:56:25,044 INFO L226 Difference]: Without dead ends: 1613 [2021-12-17 20:56:25,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,051 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 999 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 20:56:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-17 20:56:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-17 20:56:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6449410304158907) internal successors, (2650), 1612 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2650 transitions. [2021-12-17 20:56:25,159 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2650 transitions. Word has length 20 [2021-12-17 20:56:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2650 transitions. [2021-12-17 20:56:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2650 transitions. [2021-12-17 20:56:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 20:56:25,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,161 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] [2021-12-17 20:56:25,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:56:25,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,162 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-12-17 20:56:25,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640169643] [2021-12-17 20:56:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640169643] [2021-12-17 20:56:25,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640169643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:56:25,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251297329] [2021-12-17 20:56:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:56:25,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:56:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:56:25,234 INFO L87 Difference]: Start difference. First operand 1613 states and 2650 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,296 INFO L93 Difference]: Finished difference Result 1679 states and 2752 transitions. [2021-12-17 20:56:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:56:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 20:56:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,302 INFO L225 Difference]: With dead ends: 1679 [2021-12-17 20:56:25,302 INFO L226 Difference]: Without dead ends: 1613 [2021-12-17 20:56:25,305 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 [2021-12-17 20:56:25,306 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-17 20:56:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-17 20:56:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6201117318435754) internal successors, (2610), 1612 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2610 transitions. [2021-12-17 20:56:25,337 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2610 transitions. Word has length 38 [2021-12-17 20:56:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,337 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2610 transitions. [2021-12-17 20:56:25,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2610 transitions. [2021-12-17 20:56:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:25,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:25,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:56:25,347 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-12-17 20:56:25,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545250366] [2021-12-17 20:56:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545250366] [2021-12-17 20:56:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545250366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:25,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267765440] [2021-12-17 20:56:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,437 INFO L87 Difference]: Start difference. First operand 1613 states and 2610 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,460 INFO L93 Difference]: Finished difference Result 1731 states and 2796 transitions. [2021-12-17 20:56:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,465 INFO L225 Difference]: With dead ends: 1731 [2021-12-17 20:56:25,465 INFO L226 Difference]: Without dead ends: 1669 [2021-12-17 20:56:25,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,470 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-12-17 20:56:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2021-12-17 20:56:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.6192192192192192) internal successors, (2696), 1666 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2696 transitions. [2021-12-17 20:56:25,498 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2696 transitions. Word has length 77 [2021-12-17 20:56:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,499 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2696 transitions. [2021-12-17 20:56:25,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2696 transitions. [2021-12-17 20:56:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:25,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:25,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:56:25,501 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-12-17 20:56:25,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633272977] [2021-12-17 20:56:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633272977] [2021-12-17 20:56:25,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633272977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:25,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40758134] [2021-12-17 20:56:25,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:25,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:25,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,578 INFO L87 Difference]: Start difference. First operand 1667 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,601 INFO L93 Difference]: Finished difference Result 1887 states and 3044 transitions. [2021-12-17 20:56:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,607 INFO L225 Difference]: With dead ends: 1887 [2021-12-17 20:56:25,607 INFO L226 Difference]: Without dead ends: 1771 [2021-12-17 20:56:25,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,608 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-17 20:56:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-12-17 20:56:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-17 20:56:25,633 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 77 [2021-12-17 20:56:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-17 20:56:25,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-17 20:56:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:25,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:25,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:56:25,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-12-17 20:56:25,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339223597] [2021-12-17 20:56:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339223597] [2021-12-17 20:56:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339223597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:25,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421219551] [2021-12-17 20:56:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:25,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,671 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,696 INFO L93 Difference]: Finished difference Result 2181 states and 3507 transitions. [2021-12-17 20:56:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,702 INFO L225 Difference]: With dead ends: 2181 [2021-12-17 20:56:25,702 INFO L226 Difference]: Without dead ends: 1963 [2021-12-17 20:56:25,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,704 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-17 20:56:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2021-12-17 20:56:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.6115364982133742) internal successors, (3157), 1960 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3157 transitions. [2021-12-17 20:56:25,731 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3157 transitions. Word has length 77 [2021-12-17 20:56:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,732 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3157 transitions. [2021-12-17 20:56:25,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3157 transitions. [2021-12-17 20:56:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:25,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:25,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:56:25,733 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-12-17 20:56:25,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967254024] [2021-12-17 20:56:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967254024] [2021-12-17 20:56:25,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967254024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:25,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910924522] [2021-12-17 20:56:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:25,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,770 INFO L87 Difference]: Start difference. First operand 1961 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,800 INFO L93 Difference]: Finished difference Result 2733 states and 4367 transitions. [2021-12-17 20:56:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,809 INFO L225 Difference]: With dead ends: 2733 [2021-12-17 20:56:25,810 INFO L226 Difference]: Without dead ends: 2323 [2021-12-17 20:56:25,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,811 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-12-17 20:56:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2321. [2021-12-17 20:56:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2319 states have (on average 1.6011211729193617) internal successors, (3713), 2320 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3713 transitions. [2021-12-17 20:56:25,851 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3713 transitions. Word has length 77 [2021-12-17 20:56:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:25,851 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3713 transitions. [2021-12-17 20:56:25,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3713 transitions. [2021-12-17 20:56:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:25,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:25,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:25,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:56:25,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-12-17 20:56:25,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:25,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589709257] [2021-12-17 20:56:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:25,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:25,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589709257] [2021-12-17 20:56:25,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589709257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:25,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:25,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:25,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029030507] [2021-12-17 20:56:25,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:25,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:25,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:25,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:25,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,886 INFO L87 Difference]: Start difference. First operand 2321 states and 3713 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:25,931 INFO L93 Difference]: Finished difference Result 3765 states and 5955 transitions. [2021-12-17 20:56:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:25,940 INFO L225 Difference]: With dead ends: 3765 [2021-12-17 20:56:25,940 INFO L226 Difference]: Without dead ends: 2995 [2021-12-17 20:56:25,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:25,942 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:25,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-17 20:56:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2993. [2021-12-17 20:56:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2991 states have (on average 1.583751253761284) internal successors, (4737), 2992 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4737 transitions. [2021-12-17 20:56:26,004 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4737 transitions. Word has length 77 [2021-12-17 20:56:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:26,005 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4737 transitions. [2021-12-17 20:56:26,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4737 transitions. [2021-12-17 20:56:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:56:26,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:26,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:26,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:56:26,006 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:26,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-12-17 20:56:26,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:26,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121150014] [2021-12-17 20:56:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:26,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:26,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121150014] [2021-12-17 20:56:26,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121150014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:26,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:26,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217968733] [2021-12-17 20:56:26,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:26,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:26,066 INFO L87 Difference]: Start difference. First operand 2993 states and 4737 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:26,589 INFO L93 Difference]: Finished difference Result 20297 states and 31437 transitions. [2021-12-17 20:56:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 20:56:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-17 20:56:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:26,654 INFO L225 Difference]: With dead ends: 20297 [2021-12-17 20:56:26,654 INFO L226 Difference]: Without dead ends: 18855 [2021-12-17 20:56:26,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-17 20:56:26,665 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:26,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:56:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18855 states. [2021-12-17 20:56:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18855 to 4433. [2021-12-17 20:56:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4431 states have (on average 1.5565335138794854) internal successors, (6897), 4432 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 6897 transitions. [2021-12-17 20:56:26,892 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 6897 transitions. Word has length 77 [2021-12-17 20:56:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 6897 transitions. [2021-12-17 20:56:26,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 6897 transitions. [2021-12-17 20:56:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:56:26,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:26,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:26,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:56:26,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-12-17 20:56:26,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:26,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305277701] [2021-12-17 20:56:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:26,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:26,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:26,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305277701] [2021-12-17 20:56:26,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305277701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:26,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:26,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:26,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055868852] [2021-12-17 20:56:26,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:26,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:26,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:26,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:26,935 INFO L87 Difference]: Start difference. First operand 4433 states and 6897 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:27,129 INFO L93 Difference]: Finished difference Result 9845 states and 15059 transitions. [2021-12-17 20:56:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-17 20:56:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:27,140 INFO L225 Difference]: With dead ends: 9845 [2021-12-17 20:56:27,140 INFO L226 Difference]: Without dead ends: 6963 [2021-12-17 20:56:27,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:27,145 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 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 [2021-12-17 20:56:27,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6963 states. [2021-12-17 20:56:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 6897. [2021-12-17 20:56:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5154459753444525) internal successors, (10449), 6896 states have internal predecessors, (10449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10449 transitions. [2021-12-17 20:56:27,351 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10449 transitions. Word has length 79 [2021-12-17 20:56:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:27,351 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10449 transitions. [2021-12-17 20:56:27,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10449 transitions. [2021-12-17 20:56:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:56:27,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:27,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:27,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:56:27,355 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-12-17 20:56:27,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327940979] [2021-12-17 20:56:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:27,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327940979] [2021-12-17 20:56:27,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327940979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:27,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:27,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:27,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064644140] [2021-12-17 20:56:27,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:27,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:27,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:27,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:27,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:27,545 INFO L87 Difference]: Start difference. First operand 6897 states and 10449 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:27,823 INFO L93 Difference]: Finished difference Result 12245 states and 18387 transitions. [2021-12-17 20:56:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-17 20:56:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:27,835 INFO L225 Difference]: With dead ends: 12245 [2021-12-17 20:56:27,835 INFO L226 Difference]: Without dead ends: 6899 [2021-12-17 20:56:27,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-17 20:56:27,843 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:27,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2048 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-12-17 20:56:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6897. [2021-12-17 20:56:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5061638868745468) internal successors, (10385), 6896 states have internal predecessors, (10385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10385 transitions. [2021-12-17 20:56:28,116 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10385 transitions. Word has length 79 [2021-12-17 20:56:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:28,116 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10385 transitions. [2021-12-17 20:56:28,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10385 transitions. [2021-12-17 20:56:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 20:56:28,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:28,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:28,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:56:28,118 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-12-17 20:56:28,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:28,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268098436] [2021-12-17 20:56:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:28,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:28,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268098436] [2021-12-17 20:56:28,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268098436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:28,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:28,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:56:28,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585895244] [2021-12-17 20:56:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:28,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 20:56:28,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:28,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 20:56:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 20:56:28,170 INFO L87 Difference]: Start difference. First operand 6897 states and 10385 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:28,442 INFO L93 Difference]: Finished difference Result 12243 states and 18258 transitions. [2021-12-17 20:56:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 20:56:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-17 20:56:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:28,453 INFO L225 Difference]: With dead ends: 12243 [2021-12-17 20:56:28,453 INFO L226 Difference]: Without dead ends: 6897 [2021-12-17 20:56:28,461 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 [2021-12-17 20:56:28,461 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4648 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:28,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4648 Valid, 3055 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-12-17 20:56:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6897. [2021-12-17 20:56:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.496881798404641) internal successors, (10321), 6896 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10321 transitions. [2021-12-17 20:56:28,710 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10321 transitions. Word has length 80 [2021-12-17 20:56:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:28,710 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10321 transitions. [2021-12-17 20:56:28,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10321 transitions. [2021-12-17 20:56:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 20:56:28,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:28,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:28,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:56:28,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-12-17 20:56:28,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175957523] [2021-12-17 20:56:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:28,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:28,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175957523] [2021-12-17 20:56:28,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175957523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:28,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:28,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:28,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893756012] [2021-12-17 20:56:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:28,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:28,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:28,782 INFO L87 Difference]: Start difference. First operand 6897 states and 10321 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:29,150 INFO L93 Difference]: Finished difference Result 10867 states and 16028 transitions. [2021-12-17 20:56:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 20:56:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-17 20:56:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:29,166 INFO L225 Difference]: With dead ends: 10867 [2021-12-17 20:56:29,166 INFO L226 Difference]: Without dead ends: 10865 [2021-12-17 20:56:29,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 20:56:29,169 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 696 mSDsluCounter, 9179 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 10807 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:29,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 10807 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2021-12-17 20:56:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 7089. [2021-12-17 20:56:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7087 states have (on average 1.4789050373924086) internal successors, (10481), 7088 states have internal predecessors, (10481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 10481 transitions. [2021-12-17 20:56:29,418 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 10481 transitions. Word has length 80 [2021-12-17 20:56:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:29,418 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 10481 transitions. [2021-12-17 20:56:29,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 10481 transitions. [2021-12-17 20:56:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 20:56:29,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:29,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:29,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:56:29,422 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-12-17 20:56:29,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:29,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213673828] [2021-12-17 20:56:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:29,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:29,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:29,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213673828] [2021-12-17 20:56:29,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213673828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:29,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:29,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:29,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938837830] [2021-12-17 20:56:29,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:29,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:29,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:29,454 INFO L87 Difference]: Start difference. First operand 7089 states and 10481 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-12-17 20:56:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:29,753 INFO L93 Difference]: Finished difference Result 12728 states and 18679 transitions. [2021-12-17 20:56:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) Word has length 81 [2021-12-17 20:56:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:29,765 INFO L225 Difference]: With dead ends: 12728 [2021-12-17 20:56:29,765 INFO L226 Difference]: Without dead ends: 9653 [2021-12-17 20:56:29,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:29,769 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:29,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2021-12-17 20:56:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9651. [2021-12-17 20:56:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.4611876878432999) internal successors, (14099), 9650 states have internal predecessors, (14099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 14099 transitions. [2021-12-17 20:56:30,084 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 14099 transitions. Word has length 81 [2021-12-17 20:56:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:30,085 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 14099 transitions. [2021-12-17 20:56:30,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-12-17 20:56:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 14099 transitions. [2021-12-17 20:56:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 20:56:30,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:30,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:30,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:56:30,087 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:30,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:30,087 INFO L85 PathProgramCache]: Analyzing trace with hash 684368052, now seen corresponding path program 1 times [2021-12-17 20:56:30,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:30,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107627326] [2021-12-17 20:56:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:30,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 20:56:30,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107627326] [2021-12-17 20:56:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107627326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:30,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:30,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:56:30,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035860074] [2021-12-17 20:56:30,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:30,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:30,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:30,132 INFO L87 Difference]: Start difference. First operand 9651 states and 14099 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:32,841 INFO L93 Difference]: Finished difference Result 12657 states and 19026 transitions. [2021-12-17 20:56:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 91 [2021-12-17 20:56:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:32,859 INFO L225 Difference]: With dead ends: 12657 [2021-12-17 20:56:32,859 INFO L226 Difference]: Without dead ends: 11153 [2021-12-17 20:56:32,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:32,865 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:32,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 618 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 20:56:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-17 20:56:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 11153. [2021-12-17 20:56:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11153 states, 11151 states have (on average 1.4275849699578513) internal successors, (15919), 11152 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11153 states to 11153 states and 15919 transitions. [2021-12-17 20:56:33,201 INFO L78 Accepts]: Start accepts. Automaton has 11153 states and 15919 transitions. Word has length 91 [2021-12-17 20:56:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:33,202 INFO L470 AbstractCegarLoop]: Abstraction has 11153 states and 15919 transitions. [2021-12-17 20:56:33,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11153 states and 15919 transitions. [2021-12-17 20:56:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:56:33,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:33,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:56:33,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash 626430014, now seen corresponding path program 1 times [2021-12-17 20:56:33,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:33,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025067409] [2021-12-17 20:56:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:33,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:33,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:33,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025067409] [2021-12-17 20:56:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025067409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:33,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:33,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:33,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779660857] [2021-12-17 20:56:33,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:33,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 20:56:33,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 20:56:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 20:56:33,314 INFO L87 Difference]: Start difference. First operand 11153 states and 15919 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:35,866 INFO L93 Difference]: Finished difference Result 14926 states and 21060 transitions. [2021-12-17 20:56:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:56:35,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-17 20:56:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:35,890 INFO L225 Difference]: With dead ends: 14926 [2021-12-17 20:56:35,890 INFO L226 Difference]: Without dead ends: 11920 [2021-12-17 20:56:35,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:56:35,900 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1503 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:35,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1931 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 20:56:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11920 states. [2021-12-17 20:56:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11920 to 11904. [2021-12-17 20:56:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11902 states have (on average 1.4011090573012939) internal successors, (16676), 11903 states have internal predecessors, (16676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 16676 transitions. [2021-12-17 20:56:36,362 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 16676 transitions. Word has length 95 [2021-12-17 20:56:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:36,363 INFO L470 AbstractCegarLoop]: Abstraction has 11904 states and 16676 transitions. [2021-12-17 20:56:36,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 16676 transitions. [2021-12-17 20:56:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:56:36,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:36,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:36,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 20:56:36,367 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-12-17 20:56:36,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281698972] [2021-12-17 20:56:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:36,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 20:56:36,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281698972] [2021-12-17 20:56:36,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281698972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:36,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:36,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:36,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282502423] [2021-12-17 20:56:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:36,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:36,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:36,428 INFO L87 Difference]: Start difference. First operand 11904 states and 16676 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:38,181 INFO L93 Difference]: Finished difference Result 62094 states and 88395 transitions. [2021-12-17 20:56:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 20:56:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:38,263 INFO L225 Difference]: With dead ends: 62094 [2021-12-17 20:56:38,264 INFO L226 Difference]: Without dead ends: 53996 [2021-12-17 20:56:38,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:56:38,283 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8634 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8634 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8634 Valid, 3833 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:56:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53996 states. [2021-12-17 20:56:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53996 to 20000. [2021-12-17 20:56:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20000 states, 19998 states have (on average 1.4083408340834083) internal successors, (28164), 19999 states have internal predecessors, (28164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20000 states to 20000 states and 28164 transitions. [2021-12-17 20:56:39,299 INFO L78 Accepts]: Start accepts. Automaton has 20000 states and 28164 transitions. Word has length 112 [2021-12-17 20:56:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:39,300 INFO L470 AbstractCegarLoop]: Abstraction has 20000 states and 28164 transitions. [2021-12-17 20:56:39,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20000 states and 28164 transitions. [2021-12-17 20:56:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:56:39,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:39,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:39,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 20:56:39,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-12-17 20:56:39,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:39,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134611562] [2021-12-17 20:56:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:39,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 20:56:39,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134611562] [2021-12-17 20:56:39,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134611562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:39,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:39,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:39,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926454584] [2021-12-17 20:56:39,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:39,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:39,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:39,385 INFO L87 Difference]: Start difference. First operand 20000 states and 28164 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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) [2021-12-17 20:56:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:41,744 INFO L93 Difference]: Finished difference Result 70190 states and 99883 transitions. [2021-12-17 20:56:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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) Word has length 112 [2021-12-17 20:56:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:41,828 INFO L225 Difference]: With dead ends: 70190 [2021-12-17 20:56:41,829 INFO L226 Difference]: Without dead ends: 62092 [2021-12-17 20:56:41,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:56:41,851 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8459 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8459 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8459 Valid, 3881 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:56:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62092 states. [2021-12-17 20:56:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62092 to 32160. [2021-12-17 20:56:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32160 states, 32158 states have (on average 1.4091672367684558) internal successors, (45316), 32159 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32160 states to 32160 states and 45316 transitions. [2021-12-17 20:56:43,391 INFO L78 Accepts]: Start accepts. Automaton has 32160 states and 45316 transitions. Word has length 112 [2021-12-17 20:56:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:43,391 INFO L470 AbstractCegarLoop]: Abstraction has 32160 states and 45316 transitions. [2021-12-17 20:56:43,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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) [2021-12-17 20:56:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32160 states and 45316 transitions. [2021-12-17 20:56:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:56:43,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:43,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:43,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 20:56:43,397 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-12-17 20:56:43,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:43,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089790457] [2021-12-17 20:56:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:43,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 20:56:43,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089790457] [2021-12-17 20:56:43,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089790457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:43,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:43,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:43,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121345161] [2021-12-17 20:56:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:43,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:43,463 INFO L87 Difference]: Start difference. First operand 32160 states and 45316 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:46,638 INFO L93 Difference]: Finished difference Result 78286 states and 111371 transitions. [2021-12-17 20:56:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 20:56:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:46,738 INFO L225 Difference]: With dead ends: 78286 [2021-12-17 20:56:46,738 INFO L226 Difference]: Without dead ends: 70188 [2021-12-17 20:56:46,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:56:46,765 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:46,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:56:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70188 states. [2021-12-17 20:56:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70188 to 40256. [2021-12-17 20:56:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40256 states, 40254 states have (on average 1.4111392656630397) internal successors, (56804), 40255 states have internal predecessors, (56804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40256 states to 40256 states and 56804 transitions. [2021-12-17 20:56:48,748 INFO L78 Accepts]: Start accepts. Automaton has 40256 states and 56804 transitions. Word has length 112 [2021-12-17 20:56:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:48,748 INFO L470 AbstractCegarLoop]: Abstraction has 40256 states and 56804 transitions. [2021-12-17 20:56:48,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 40256 states and 56804 transitions. [2021-12-17 20:56:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:56:48,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:48,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:48,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:56:48,755 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-12-17 20:56:48,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908724336] [2021-12-17 20:56:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:48,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 20:56:48,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:48,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908724336] [2021-12-17 20:56:48,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908724336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:48,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85863597] [2021-12-17 20:56:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:48,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:48,819 INFO L87 Difference]: Start difference. First operand 40256 states and 56804 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:52,621 INFO L93 Difference]: Finished difference Result 86382 states and 122859 transitions. [2021-12-17 20:56:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 20:56:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:52,731 INFO L225 Difference]: With dead ends: 86382 [2021-12-17 20:56:52,731 INFO L226 Difference]: Without dead ends: 78284 [2021-12-17 20:56:52,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:56:52,765 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8497 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8497 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:52,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8497 Valid, 3944 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:56:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78284 states. [2021-12-17 20:56:55,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78284 to 48352. [2021-12-17 20:56:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48352 states, 48350 states have (on average 1.412450879007239) internal successors, (68292), 48351 states have internal predecessors, (68292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48352 states to 48352 states and 68292 transitions. [2021-12-17 20:56:55,410 INFO L78 Accepts]: Start accepts. Automaton has 48352 states and 68292 transitions. Word has length 112 [2021-12-17 20:56:55,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:55,410 INFO L470 AbstractCegarLoop]: Abstraction has 48352 states and 68292 transitions. [2021-12-17 20:56:55,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 48352 states and 68292 transitions. [2021-12-17 20:56:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:56:55,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:55,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:56:55,417 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-12-17 20:56:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101566138] [2021-12-17 20:56:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:55,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 20:56:55,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101566138] [2021-12-17 20:56:55,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101566138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:55,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:55,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:56:55,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995532018] [2021-12-17 20:56:55,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:55,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:56:55,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:56:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:56:55,474 INFO L87 Difference]: Start difference. First operand 48352 states and 68292 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:59,648 INFO L93 Difference]: Finished difference Result 94478 states and 134347 transitions. [2021-12-17 20:56:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:56:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 20:56:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:59,771 INFO L225 Difference]: With dead ends: 94478 [2021-12-17 20:56:59,772 INFO L226 Difference]: Without dead ends: 86380 [2021-12-17 20:56:59,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:56:59,801 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8611 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8611 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:59,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8611 Valid, 3885 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86380 states. [2021-12-17 20:57:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86380 to 56448. [2021-12-17 20:57:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56448 states, 56446 states have (on average 1.4133862452609574) internal successors, (79780), 56447 states have internal predecessors, (79780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56448 states to 56448 states and 79780 transitions. [2021-12-17 20:57:03,700 INFO L78 Accepts]: Start accepts. Automaton has 56448 states and 79780 transitions. Word has length 112 [2021-12-17 20:57:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:57:03,701 INFO L470 AbstractCegarLoop]: Abstraction has 56448 states and 79780 transitions. [2021-12-17 20:57:03,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56448 states and 79780 transitions. [2021-12-17 20:57:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 20:57:03,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:57:03,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:57:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 20:57:03,711 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:57:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:57:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-12-17 20:57:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:57:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421724259] [2021-12-17 20:57:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:57:03,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:57:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:57:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:57:03,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:57:03,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421724259] [2021-12-17 20:57:03,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421724259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:57:03,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:57:03,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:57:03,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256437717] [2021-12-17 20:57:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:57:03,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:57:03,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:57:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:57:03,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:57:03,755 INFO L87 Difference]: Start difference. First operand 56448 states and 79780 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:57:06,074 INFO L93 Difference]: Finished difference Result 93094 states and 132238 transitions. [2021-12-17 20:57:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:57:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-17 20:57:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:57:06,126 INFO L225 Difference]: With dead ends: 93094 [2021-12-17 20:57:06,126 INFO L226 Difference]: Without dead ends: 40452 [2021-12-17 20:57:06,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:57:06,160 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 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 [2021-12-17 20:57:06,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:57:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-12-17 20:57:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 40450. [2021-12-17 20:57:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40450 states, 40448 states have (on average 1.4124554984177216) internal successors, (57131), 40449 states have internal predecessors, (57131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40450 states to 40450 states and 57131 transitions. [2021-12-17 20:57:08,538 INFO L78 Accepts]: Start accepts. Automaton has 40450 states and 57131 transitions. Word has length 114 [2021-12-17 20:57:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:57:08,538 INFO L470 AbstractCegarLoop]: Abstraction has 40450 states and 57131 transitions. [2021-12-17 20:57:08,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 40450 states and 57131 transitions. [2021-12-17 20:57:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 20:57:08,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:57:08,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:57:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 20:57:08,544 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:57:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:57:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-12-17 20:57:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:57:08,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585223737] [2021-12-17 20:57:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:57:08,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:57:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:57:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:57:08,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:57:08,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585223737] [2021-12-17 20:57:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585223737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:57:08,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:57:08,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:57:08,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600572197] [2021-12-17 20:57:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:57:08,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:57:08,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:57:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:57:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:57:08,618 INFO L87 Difference]: Start difference. First operand 40450 states and 57131 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:57:12,207 INFO L93 Difference]: Finished difference Result 74256 states and 105522 transitions. [2021-12-17 20:57:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:57:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 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 114 [2021-12-17 20:57:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:57:12,420 INFO L225 Difference]: With dead ends: 74256 [2021-12-17 20:57:12,420 INFO L226 Difference]: Without dead ends: 68622 [2021-12-17 20:57:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:57:12,436 INFO L933 BasicCegarLoop]: 1667 mSDtfsCounter, 8579 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8579 SdHoareTripleChecker+Valid, 3859 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:57:12,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8579 Valid, 3859 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:57:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68622 states. [2021-12-17 20:57:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68622 to 46082. [2021-12-17 20:57:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46082 states, 46080 states have (on average 1.4134331597222223) internal successors, (65131), 46081 states have internal predecessors, (65131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46082 states to 46082 states and 65131 transitions. [2021-12-17 20:57:15,363 INFO L78 Accepts]: Start accepts. Automaton has 46082 states and 65131 transitions. Word has length 114 [2021-12-17 20:57:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:57:15,363 INFO L470 AbstractCegarLoop]: Abstraction has 46082 states and 65131 transitions. [2021-12-17 20:57:15,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:57:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 46082 states and 65131 transitions. [2021-12-17 20:57:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-17 20:57:15,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:57:15,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:57:15,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 20:57:15,371 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:57:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:57:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1184656150, now seen corresponding path program 1 times [2021-12-17 20:57:15,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:57:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323802006] [2021-12-17 20:57:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:57:15,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:57:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:57:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:57:15,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:57:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323802006] [2021-12-17 20:57:15,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323802006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:57:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652730661] [2021-12-17 20:57:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:57:15,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:57:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:57:15,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:57:15,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:57:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:57:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 20:57:15,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:57:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:57:16,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:57:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:57:16,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652730661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:57:16,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:57:16,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-17 20:57:16,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041530981] [2021-12-17 20:57:16,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:57:16,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 20:57:16,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:57:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 20:57:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-17 20:57:16,377 INFO L87 Difference]: Start difference. First operand 46082 states and 65131 transitions. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)