./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.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 b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:16:02,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:16:02,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:16:02,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:16:02,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:16:02,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:16:02,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:16:02,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:16:02,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:16:02,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:16:02,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:16:02,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:16:02,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:16:02,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:16:02,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:16:02,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:16:02,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:16:02,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:16:02,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:16:02,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:16:02,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:16:02,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:16:02,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:16:02,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:16:02,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:16:02,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:16:02,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:16:02,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:16:02,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:16:02,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:16:02,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:16:02,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:16:02,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:16:02,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:16:02,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:16:02,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:16:02,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:16:02,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:16:02,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:16:02,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:16:02,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:16:02,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:16:02,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:16:02,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:16:02,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:16:02,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:16:02,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:16:02,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:16:02,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:16:02,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:16:02,192 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:16:02,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:16:02,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:16:02,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:16:02,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:16:02,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:16:02,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:16:02,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:16:02,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:16:02,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:16:02,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:16:02,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:02,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:16:02,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:16:02,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:16:02,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:16:02,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:16:02,196 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:16:02,196 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:16:02,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:16:02,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:16:02,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 [2021-12-14 16:16:02,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:16:02,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:16:02,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:16:02,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:16:02,518 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:16:02,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2021-12-14 16:16:02,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507b51be1/e1bdb5b5193f402b97643fef9981395c/FLAGef3f56af0 [2021-12-14 16:16:03,018 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:16:03,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2021-12-14 16:16:03,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507b51be1/e1bdb5b5193f402b97643fef9981395c/FLAGef3f56af0 [2021-12-14 16:16:03,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507b51be1/e1bdb5b5193f402b97643fef9981395c [2021-12-14 16:16:03,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:16:03,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:16:03,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:03,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:16:03,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:16:03,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5bcb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03, skipping insertion in model container [2021-12-14 16:16:03,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:16:03,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:16:03,588 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/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2021-12-14 16:16:03,681 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/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2021-12-14 16:16:03,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:03,769 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:16:03,781 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/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2021-12-14 16:16:03,805 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/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2021-12-14 16:16:03,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:03,869 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:16:03,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03 WrapperNode [2021-12-14 16:16:03,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:03,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:03,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:16:03,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:16:03,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,927 INFO L137 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 649 [2021-12-14 16:16:03,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:03,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:16:03,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:16:03,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:16:03,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:16:03,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:16:03,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:16:03,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:16:03,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (1/1) ... [2021-12-14 16:16:03,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:04,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:04,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:16:04,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:16:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:16:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:16:04,045 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:16:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:16:04,050 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:16:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:16:04,050 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:16:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:16:04,050 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:16:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:16:04,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:16:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:16:04,051 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:16:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:16:04,051 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:16:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:16:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:16:04,052 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:16:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:16:04,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:16:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:16:04,052 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:16:04,178 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:16:04,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:16:04,716 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:16:04,724 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:16:04,725 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-14 16:16:04,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:04 BoogieIcfgContainer [2021-12-14 16:16:04,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:16:04,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:16:04,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:16:04,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:16:04,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:16:03" (1/3) ... [2021-12-14 16:16:04,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f0f703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:04, skipping insertion in model container [2021-12-14 16:16:04,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:03" (2/3) ... [2021-12-14 16:16:04,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f0f703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:04, skipping insertion in model container [2021-12-14 16:16:04,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:04" (3/3) ... [2021-12-14 16:16:04,738 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2021-12-14 16:16:04,742 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:16:04,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:16:04,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:16:04,792 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:16:04,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:16:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 242 states have (on average 1.6074380165289257) internal successors, (389), 247 states have internal predecessors, (389), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 16:16:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:04,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:04,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:04,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -196001466, now seen corresponding path program 1 times [2021-12-14 16:16:04,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:04,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602041747] [2021-12-14 16:16:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:04,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:05,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602041747] [2021-12-14 16:16:05,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602041747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:05,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:05,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:05,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034350465] [2021-12-14 16:16:05,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:05,172 INFO L87 Difference]: Start difference. First operand has 279 states, 242 states have (on average 1.6074380165289257) internal successors, (389), 247 states have internal predecessors, (389), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:05,469 INFO L93 Difference]: Finished difference Result 610 states and 960 transitions. [2021-12-14 16:16:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:16:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:05,482 INFO L225 Difference]: With dead ends: 610 [2021-12-14 16:16:05,483 INFO L226 Difference]: Without dead ends: 339 [2021-12-14 16:16:05,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:05,491 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 524 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:05,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 707 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-14 16:16:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2021-12-14 16:16:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 291 states have (on average 1.47766323024055) internal successors, (430), 295 states have internal predecessors, (430), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-12-14 16:16:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 492 transitions. [2021-12-14 16:16:05,567 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 492 transitions. Word has length 44 [2021-12-14 16:16:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:05,568 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 492 transitions. [2021-12-14 16:16:05,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 492 transitions. [2021-12-14 16:16:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:05,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:05,572 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] [2021-12-14 16:16:05,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:16:05,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1414910090, now seen corresponding path program 1 times [2021-12-14 16:16:05,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:05,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984649138] [2021-12-14 16:16:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:05,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:05,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:05,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984649138] [2021-12-14 16:16:05,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984649138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:05,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:05,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:05,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161481013] [2021-12-14 16:16:05,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:05,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:05,701 INFO L87 Difference]: Start difference. First operand 333 states and 492 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:05,995 INFO L93 Difference]: Finished difference Result 581 states and 832 transitions. [2021-12-14 16:16:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,008 INFO L225 Difference]: With dead ends: 581 [2021-12-14 16:16:06,008 INFO L226 Difference]: Without dead ends: 457 [2021-12-14 16:16:06,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:06,016 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 228 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 909 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-14 16:16:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 400. [2021-12-14 16:16:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 352 states have (on average 1.4602272727272727) internal successors, (514), 356 states have internal predecessors, (514), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-14 16:16:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 582 transitions. [2021-12-14 16:16:06,081 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 582 transitions. Word has length 45 [2021-12-14 16:16:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,081 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 582 transitions. [2021-12-14 16:16:06,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 582 transitions. [2021-12-14 16:16:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:06,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,089 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] [2021-12-14 16:16:06,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:16:06,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,091 INFO L85 PathProgramCache]: Analyzing trace with hash 130552629, now seen corresponding path program 1 times [2021-12-14 16:16:06,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215707757] [2021-12-14 16:16:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:06,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215707757] [2021-12-14 16:16:06,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215707757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:06,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:06,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14283881] [2021-12-14 16:16:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:06,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:06,184 INFO L87 Difference]: Start difference. First operand 400 states and 582 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:06,348 INFO L93 Difference]: Finished difference Result 808 states and 1141 transitions. [2021-12-14 16:16:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,353 INFO L225 Difference]: With dead ends: 808 [2021-12-14 16:16:06,353 INFO L226 Difference]: Without dead ends: 617 [2021-12-14 16:16:06,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:06,362 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 533 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 704 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-14 16:16:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 565. [2021-12-14 16:16:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 498 states have (on average 1.4136546184738956) internal successors, (704), 505 states have internal predecessors, (704), 43 states have call successors, (43), 21 states have call predecessors, (43), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2021-12-14 16:16:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 800 transitions. [2021-12-14 16:16:06,396 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 800 transitions. Word has length 45 [2021-12-14 16:16:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,396 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 800 transitions. [2021-12-14 16:16:06,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 800 transitions. [2021-12-14 16:16:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:16:06,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,398 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:16:06,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:16:06,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1692231402, now seen corresponding path program 1 times [2021-12-14 16:16:06,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535876438] [2021-12-14 16:16:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:16:06,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535876438] [2021-12-14 16:16:06,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535876438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:06,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:06,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992899442] [2021-12-14 16:16:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:06,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:06,456 INFO L87 Difference]: Start difference. First operand 565 states and 800 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:06,713 INFO L93 Difference]: Finished difference Result 1149 states and 1585 transitions. [2021-12-14 16:16:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:16:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,717 INFO L225 Difference]: With dead ends: 1149 [2021-12-14 16:16:06,718 INFO L226 Difference]: Without dead ends: 793 [2021-12-14 16:16:06,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:06,719 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 212 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 943 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:16:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-14 16:16:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2021-12-14 16:16:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 664 states have (on average 1.3614457831325302) internal successors, (904), 673 states have internal predecessors, (904), 57 states have call successors, (57), 29 states have call predecessors, (57), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2021-12-14 16:16:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1038 transitions. [2021-12-14 16:16:06,759 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1038 transitions. Word has length 62 [2021-12-14 16:16:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:06,760 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1038 transitions. [2021-12-14 16:16:06,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1038 transitions. [2021-12-14 16:16:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:16:06,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:06,762 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:16:06,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:16:06,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 492946489, now seen corresponding path program 1 times [2021-12-14 16:16:06,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282539946] [2021-12-14 16:16:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:06,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:16:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:16:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:16:06,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282539946] [2021-12-14 16:16:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282539946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:06,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:06,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:06,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583656621] [2021-12-14 16:16:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:06,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:06,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:06,813 INFO L87 Difference]: Start difference. First operand 755 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:06,963 INFO L93 Difference]: Finished difference Result 1408 states and 1891 transitions. [2021-12-14 16:16:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:16:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:06,968 INFO L225 Difference]: With dead ends: 1408 [2021-12-14 16:16:06,968 INFO L226 Difference]: Without dead ends: 954 [2021-12-14 16:16:06,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:06,970 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 520 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:06,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 701 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-12-14 16:16:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 899. [2021-12-14 16:16:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 792 states have (on average 1.332070707070707) internal successors, (1055), 803 states have internal predecessors, (1055), 65 states have call successors, (65), 35 states have call predecessors, (65), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-12-14 16:16:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1211 transitions. [2021-12-14 16:16:07,008 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1211 transitions. Word has length 67 [2021-12-14 16:16:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:07,008 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1211 transitions. [2021-12-14 16:16:07,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1211 transitions. [2021-12-14 16:16:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:16:07,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:07,011 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] [2021-12-14 16:16:07,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:16:07,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1766542515, now seen corresponding path program 1 times [2021-12-14 16:16:07,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:07,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337996480] [2021-12-14 16:16:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:07,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:07,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337996480] [2021-12-14 16:16:07,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337996480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472720836] [2021-12-14 16:16:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:07,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:07,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:07,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:16:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 16:16:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:07,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:07,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472720836] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:07,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:16:07,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:16:07,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758935863] [2021-12-14 16:16:07,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:07,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:07,492 INFO L87 Difference]: Start difference. First operand 899 states and 1211 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:07,607 INFO L93 Difference]: Finished difference Result 955 states and 1279 transitions. [2021-12-14 16:16:07,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:16:07,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:16:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:07,613 INFO L225 Difference]: With dead ends: 955 [2021-12-14 16:16:07,613 INFO L226 Difference]: Without dead ends: 952 [2021-12-14 16:16:07,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:07,614 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 713 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 493 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:07,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-14 16:16:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 898. [2021-12-14 16:16:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 792 states have (on average 1.3295454545454546) internal successors, (1053), 802 states have internal predecessors, (1053), 64 states have call successors, (64), 35 states have call predecessors, (64), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2021-12-14 16:16:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1208 transitions. [2021-12-14 16:16:07,656 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1208 transitions. Word has length 68 [2021-12-14 16:16:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1208 transitions. [2021-12-14 16:16:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1208 transitions. [2021-12-14 16:16:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:16:07,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:07,658 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] [2021-12-14 16:16:07,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:07,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 16:16:07,882 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1072636420, now seen corresponding path program 1 times [2021-12-14 16:16:07,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286748471] [2021-12-14 16:16:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:07,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:07,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286748471] [2021-12-14 16:16:07,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286748471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264683769] [2021-12-14 16:16:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:07,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:07,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:16:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:08,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:08,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264683769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:16:08,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:16:08,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:16:08,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527307097] [2021-12-14 16:16:08,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:16:08,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:16:08,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:16:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:08,519 INFO L87 Difference]: Start difference. First operand 898 states and 1208 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:09,784 INFO L93 Difference]: Finished difference Result 2598 states and 3428 transitions. [2021-12-14 16:16:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:09,794 INFO L225 Difference]: With dead ends: 2598 [2021-12-14 16:16:09,795 INFO L226 Difference]: Without dead ends: 2054 [2021-12-14 16:16:09,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:09,799 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 877 mSDsluCounter, 2527 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:09,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 3058 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:16:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-12-14 16:16:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1287. [2021-12-14 16:16:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1142 states have (on average 1.3021015761821366) internal successors, (1487), 1160 states have internal predecessors, (1487), 84 states have call successors, (84), 49 states have call predecessors, (84), 59 states have return successors, (125), 78 states have call predecessors, (125), 83 states have call successors, (125) [2021-12-14 16:16:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1696 transitions. [2021-12-14 16:16:09,875 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1696 transitions. Word has length 69 [2021-12-14 16:16:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:09,875 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1696 transitions. [2021-12-14 16:16:09,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1696 transitions. [2021-12-14 16:16:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:09,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:09,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 16:16:09,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:10,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 16:16:10,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:10,100 INFO L85 PathProgramCache]: Analyzing trace with hash -357727812, now seen corresponding path program 1 times [2021-12-14 16:16:10,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324849722] [2021-12-14 16:16:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:10,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:10,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324849722] [2021-12-14 16:16:10,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324849722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:10,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077370765] [2021-12-14 16:16:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:10,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:10,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:10,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:16:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:10,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:10,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077370765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:10,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:10,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:10,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944245198] [2021-12-14 16:16:10,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:10,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:10,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:10,417 INFO L87 Difference]: Start difference. First operand 1287 states and 1696 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:10,466 INFO L93 Difference]: Finished difference Result 2010 states and 2634 transitions. [2021-12-14 16:16:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:10,473 INFO L225 Difference]: With dead ends: 2010 [2021-12-14 16:16:10,473 INFO L226 Difference]: Without dead ends: 1165 [2021-12-14 16:16:10,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:10,478 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 361 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:10,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 507 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-14 16:16:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1150. [2021-12-14 16:16:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1021 states have (on average 1.3016650342801175) internal successors, (1329), 1038 states have internal predecessors, (1329), 76 states have call successors, (76), 43 states have call predecessors, (76), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2021-12-14 16:16:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1516 transitions. [2021-12-14 16:16:10,531 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1516 transitions. Word has length 88 [2021-12-14 16:16:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1516 transitions. [2021-12-14 16:16:10,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1516 transitions. [2021-12-14 16:16:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:10,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:10,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:10,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:10,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:10,754 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash -884291044, now seen corresponding path program 1 times [2021-12-14 16:16:10,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:10,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939407633] [2021-12-14 16:16:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:10,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:10,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:10,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939407633] [2021-12-14 16:16:10,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939407633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:10,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:10,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:10,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421597483] [2021-12-14 16:16:10,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:10,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:10,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:10,847 INFO L87 Difference]: Start difference. First operand 1150 states and 1516 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:11,942 INFO L93 Difference]: Finished difference Result 1662 states and 2323 transitions. [2021-12-14 16:16:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:11,949 INFO L225 Difference]: With dead ends: 1662 [2021-12-14 16:16:11,950 INFO L226 Difference]: Without dead ends: 1473 [2021-12-14 16:16:11,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:11,953 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 893 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:11,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 1151 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:16:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-12-14 16:16:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1344. [2021-12-14 16:16:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1194 states have (on average 1.338358458961474) internal successors, (1598), 1212 states have internal predecessors, (1598), 90 states have call successors, (90), 49 states have call predecessors, (90), 58 states have return successors, (128), 83 states have call predecessors, (128), 89 states have call successors, (128) [2021-12-14 16:16:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1816 transitions. [2021-12-14 16:16:12,038 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1816 transitions. Word has length 101 [2021-12-14 16:16:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:12,039 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1816 transitions. [2021-12-14 16:16:12,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1816 transitions. [2021-12-14 16:16:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:12,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:12,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:16:12,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1693791648, now seen corresponding path program 1 times [2021-12-14 16:16:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018276340] [2021-12-14 16:16:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:12,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:12,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:12,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018276340] [2021-12-14 16:16:12,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018276340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:12,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:12,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:12,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179089152] [2021-12-14 16:16:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:12,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:12,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:12,141 INFO L87 Difference]: Start difference. First operand 1344 states and 1816 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:12,894 INFO L93 Difference]: Finished difference Result 1864 states and 2639 transitions. [2021-12-14 16:16:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:12,901 INFO L225 Difference]: With dead ends: 1864 [2021-12-14 16:16:12,901 INFO L226 Difference]: Without dead ends: 1481 [2021-12-14 16:16:12,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:12,903 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 803 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:12,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 946 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-12-14 16:16:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1344. [2021-12-14 16:16:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1194 states have (on average 1.3366834170854272) internal successors, (1596), 1212 states have internal predecessors, (1596), 90 states have call successors, (90), 49 states have call predecessors, (90), 58 states have return successors, (128), 83 states have call predecessors, (128), 89 states have call successors, (128) [2021-12-14 16:16:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1814 transitions. [2021-12-14 16:16:12,994 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1814 transitions. Word has length 101 [2021-12-14 16:16:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:12,994 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1814 transitions. [2021-12-14 16:16:12,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1814 transitions. [2021-12-14 16:16:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:12,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:12,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:12,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:16:12,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -185339298, now seen corresponding path program 1 times [2021-12-14 16:16:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574142669] [2021-12-14 16:16:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:12,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:13,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:13,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574142669] [2021-12-14 16:16:13,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574142669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:13,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:13,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:13,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646632282] [2021-12-14 16:16:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:13,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:13,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:13,085 INFO L87 Difference]: Start difference. First operand 1344 states and 1814 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:13,839 INFO L93 Difference]: Finished difference Result 1861 states and 2628 transitions. [2021-12-14 16:16:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:13,845 INFO L225 Difference]: With dead ends: 1861 [2021-12-14 16:16:13,846 INFO L226 Difference]: Without dead ends: 1478 [2021-12-14 16:16:13,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:13,848 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 798 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:13,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 940 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-12-14 16:16:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1344. [2021-12-14 16:16:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1194 states have (on average 1.3350083752093802) internal successors, (1594), 1212 states have internal predecessors, (1594), 90 states have call successors, (90), 49 states have call predecessors, (90), 58 states have return successors, (128), 83 states have call predecessors, (128), 89 states have call successors, (128) [2021-12-14 16:16:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1812 transitions. [2021-12-14 16:16:13,947 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1812 transitions. Word has length 101 [2021-12-14 16:16:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 1812 transitions. [2021-12-14 16:16:13,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1812 transitions. [2021-12-14 16:16:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:13,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:13,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:13,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:16:13,951 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1381418652, now seen corresponding path program 1 times [2021-12-14 16:16:13,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:13,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993777015] [2021-12-14 16:16:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:13,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:13,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:14,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:14,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993777015] [2021-12-14 16:16:14,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993777015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:14,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:14,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:14,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549999239] [2021-12-14 16:16:14,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:14,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:14,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:14,056 INFO L87 Difference]: Start difference. First operand 1344 states and 1812 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:15,478 INFO L93 Difference]: Finished difference Result 2115 states and 3011 transitions. [2021-12-14 16:16:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:15,488 INFO L225 Difference]: With dead ends: 2115 [2021-12-14 16:16:15,488 INFO L226 Difference]: Without dead ends: 1732 [2021-12-14 16:16:15,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:15,491 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 886 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:15,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1812 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:16:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-12-14 16:16:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1527. [2021-12-14 16:16:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1356 states have (on average 1.3554572271386431) internal successors, (1838), 1375 states have internal predecessors, (1838), 104 states have call successors, (104), 55 states have call predecessors, (104), 65 states have return successors, (144), 98 states have call predecessors, (144), 103 states have call successors, (144) [2021-12-14 16:16:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2086 transitions. [2021-12-14 16:16:15,598 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2086 transitions. Word has length 101 [2021-12-14 16:16:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 2086 transitions. [2021-12-14 16:16:15,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2086 transitions. [2021-12-14 16:16:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:15,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:15,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:15,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:16:15,602 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash 323580574, now seen corresponding path program 1 times [2021-12-14 16:16:15,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:15,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345133902] [2021-12-14 16:16:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:15,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:15,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345133902] [2021-12-14 16:16:15,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345133902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:15,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:15,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:15,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924665927] [2021-12-14 16:16:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:15,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:15,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:15,698 INFO L87 Difference]: Start difference. First operand 1527 states and 2086 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:17,213 INFO L93 Difference]: Finished difference Result 2783 states and 4031 transitions. [2021-12-14 16:16:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:17,226 INFO L225 Difference]: With dead ends: 2783 [2021-12-14 16:16:17,227 INFO L226 Difference]: Without dead ends: 2217 [2021-12-14 16:16:17,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:17,230 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 882 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1801 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:16:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-12-14 16:16:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1896. [2021-12-14 16:16:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1683 states have (on average 1.3850267379679144) internal successors, (2331), 1704 states have internal predecessors, (2331), 132 states have call successors, (132), 67 states have call predecessors, (132), 79 states have return successors, (180), 128 states have call predecessors, (180), 131 states have call successors, (180) [2021-12-14 16:16:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2643 transitions. [2021-12-14 16:16:17,341 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2643 transitions. Word has length 101 [2021-12-14 16:16:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:17,341 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 2643 transitions. [2021-12-14 16:16:17,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2643 transitions. [2021-12-14 16:16:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:17,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:17,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:17,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:16:17,345 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -818921892, now seen corresponding path program 1 times [2021-12-14 16:16:17,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:17,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885302921] [2021-12-14 16:16:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:17,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:17,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:17,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885302921] [2021-12-14 16:16:17,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885302921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:17,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:17,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:17,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487109514] [2021-12-14 16:16:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:17,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:17,448 INFO L87 Difference]: Start difference. First operand 1896 states and 2643 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:19,225 INFO L93 Difference]: Finished difference Result 4402 states and 6494 transitions. [2021-12-14 16:16:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:19,245 INFO L225 Difference]: With dead ends: 4402 [2021-12-14 16:16:19,246 INFO L226 Difference]: Without dead ends: 3467 [2021-12-14 16:16:19,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:19,251 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 934 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:19,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 1874 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:16:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-12-14 16:16:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 2625. [2021-12-14 16:16:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2332 states have (on average 1.4206689536878216) internal successors, (3313), 2357 states have internal predecessors, (3313), 184 states have call successors, (184), 91 states have call predecessors, (184), 107 states have return successors, (254), 184 states have call predecessors, (254), 183 states have call successors, (254) [2021-12-14 16:16:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3751 transitions. [2021-12-14 16:16:19,457 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3751 transitions. Word has length 101 [2021-12-14 16:16:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 3751 transitions. [2021-12-14 16:16:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3751 transitions. [2021-12-14 16:16:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:19,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:19,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:19,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:16:19,462 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -578682146, now seen corresponding path program 1 times [2021-12-14 16:16:19,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642620038] [2021-12-14 16:16:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:19,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:19,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642620038] [2021-12-14 16:16:19,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642620038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:19,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:19,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:19,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581466748] [2021-12-14 16:16:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:19,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:19,561 INFO L87 Difference]: Start difference. First operand 2625 states and 3751 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:20,337 INFO L93 Difference]: Finished difference Result 4801 states and 7128 transitions. [2021-12-14 16:16:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:20,352 INFO L225 Difference]: With dead ends: 4801 [2021-12-14 16:16:20,352 INFO L226 Difference]: Without dead ends: 3137 [2021-12-14 16:16:20,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:20,362 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 815 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:20,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 912 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:16:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-12-14 16:16:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2625. [2021-12-14 16:16:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2332 states have (on average 1.4168096054888508) internal successors, (3304), 2357 states have internal predecessors, (3304), 184 states have call successors, (184), 91 states have call predecessors, (184), 107 states have return successors, (254), 184 states have call predecessors, (254), 183 states have call successors, (254) [2021-12-14 16:16:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3742 transitions. [2021-12-14 16:16:20,539 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3742 transitions. Word has length 101 [2021-12-14 16:16:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:20,540 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 3742 transitions. [2021-12-14 16:16:20,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3742 transitions. [2021-12-14 16:16:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:20,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:20,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:20,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:16:20,545 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:20,545 INFO L85 PathProgramCache]: Analyzing trace with hash 260351516, now seen corresponding path program 1 times [2021-12-14 16:16:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775264160] [2021-12-14 16:16:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:20,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:20,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:20,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775264160] [2021-12-14 16:16:20,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775264160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:20,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:20,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:20,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135661458] [2021-12-14 16:16:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:20,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:20,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:20,632 INFO L87 Difference]: Start difference. First operand 2625 states and 3742 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:21,351 INFO L93 Difference]: Finished difference Result 4791 states and 7081 transitions. [2021-12-14 16:16:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:16:21,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:21,373 INFO L225 Difference]: With dead ends: 4791 [2021-12-14 16:16:21,374 INFO L226 Difference]: Without dead ends: 3127 [2021-12-14 16:16:21,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:21,381 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 795 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:21,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 919 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:16:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2021-12-14 16:16:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 2625. [2021-12-14 16:16:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2332 states have (on average 1.41295025728988) internal successors, (3295), 2357 states have internal predecessors, (3295), 184 states have call successors, (184), 91 states have call predecessors, (184), 107 states have return successors, (254), 184 states have call predecessors, (254), 183 states have call successors, (254) [2021-12-14 16:16:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3733 transitions. [2021-12-14 16:16:21,610 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3733 transitions. Word has length 101 [2021-12-14 16:16:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:21,611 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 3733 transitions. [2021-12-14 16:16:21,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3733 transitions. [2021-12-14 16:16:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:21,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:21,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:16:21,616 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 287417118, now seen corresponding path program 1 times [2021-12-14 16:16:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599969416] [2021-12-14 16:16:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:21,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:21,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599969416] [2021-12-14 16:16:21,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599969416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:21,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:21,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:21,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672119413] [2021-12-14 16:16:21,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:21,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:21,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:21,705 INFO L87 Difference]: Start difference. First operand 2625 states and 3733 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:23,361 INFO L93 Difference]: Finished difference Result 6957 states and 10324 transitions. [2021-12-14 16:16:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:23,382 INFO L225 Difference]: With dead ends: 6957 [2021-12-14 16:16:23,382 INFO L226 Difference]: Without dead ends: 5293 [2021-12-14 16:16:23,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:23,390 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 965 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:23,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 1767 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:16:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-12-14 16:16:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4096. [2021-12-14 16:16:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 3647 states have (on average 1.4436523169728543) internal successors, (5265), 3680 states have internal predecessors, (5265), 284 states have call successors, (284), 139 states have call predecessors, (284), 163 states have return successors, (416), 292 states have call predecessors, (416), 283 states have call successors, (416) [2021-12-14 16:16:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 5965 transitions. [2021-12-14 16:16:23,667 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 5965 transitions. Word has length 101 [2021-12-14 16:16:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:23,668 INFO L470 AbstractCegarLoop]: Abstraction has 4096 states and 5965 transitions. [2021-12-14 16:16:23,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 5965 transitions. [2021-12-14 16:16:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:23,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:23,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:23,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:16:23,675 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1789919780, now seen corresponding path program 1 times [2021-12-14 16:16:23,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873720325] [2021-12-14 16:16:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:23,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:23,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873720325] [2021-12-14 16:16:23,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873720325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:23,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:23,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:23,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188456998] [2021-12-14 16:16:23,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:23,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:23,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:23,757 INFO L87 Difference]: Start difference. First operand 4096 states and 5965 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:25,449 INFO L93 Difference]: Finished difference Result 11920 states and 17918 transitions. [2021-12-14 16:16:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:16:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:25,486 INFO L225 Difference]: With dead ends: 11920 [2021-12-14 16:16:25,486 INFO L226 Difference]: Without dead ends: 8785 [2021-12-14 16:16:25,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:16:25,501 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 882 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:25,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1759 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:16:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-12-14 16:16:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 7042. [2021-12-14 16:16:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7042 states, 6289 states have (on average 1.4687549689934807) internal successors, (9237), 6338 states have internal predecessors, (9237), 476 states have call successors, (476), 235 states have call predecessors, (476), 275 states have return successors, (786), 500 states have call predecessors, (786), 475 states have call successors, (786) [2021-12-14 16:16:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 10499 transitions. [2021-12-14 16:16:25,966 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 10499 transitions. Word has length 101 [2021-12-14 16:16:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:25,966 INFO L470 AbstractCegarLoop]: Abstraction has 7042 states and 10499 transitions. [2021-12-14 16:16:25,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 10499 transitions. [2021-12-14 16:16:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:25,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:25,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:25,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:16:25,974 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -902696934, now seen corresponding path program 1 times [2021-12-14 16:16:25,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292300464] [2021-12-14 16:16:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:25,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:26,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292300464] [2021-12-14 16:16:26,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292300464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:26,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:26,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:26,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363921671] [2021-12-14 16:16:26,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:26,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:26,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:26,112 INFO L87 Difference]: Start difference. First operand 7042 states and 10499 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:27,815 INFO L93 Difference]: Finished difference Result 17874 states and 26885 transitions. [2021-12-14 16:16:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:16:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:27,865 INFO L225 Difference]: With dead ends: 17874 [2021-12-14 16:16:27,865 INFO L226 Difference]: Without dead ends: 11794 [2021-12-14 16:16:27,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:16:27,888 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 604 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:27,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1471 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:16:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-12-14 16:16:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 7141. [2021-12-14 16:16:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7141 states, 6388 states have (on average 1.461490294301816) internal successors, (9336), 6437 states have internal predecessors, (9336), 476 states have call successors, (476), 235 states have call predecessors, (476), 275 states have return successors, (786), 500 states have call predecessors, (786), 475 states have call successors, (786) [2021-12-14 16:16:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7141 states to 7141 states and 10598 transitions. [2021-12-14 16:16:28,451 INFO L78 Accepts]: Start accepts. Automaton has 7141 states and 10598 transitions. Word has length 101 [2021-12-14 16:16:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:28,451 INFO L470 AbstractCegarLoop]: Abstraction has 7141 states and 10598 transitions. [2021-12-14 16:16:28,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7141 states and 10598 transitions. [2021-12-14 16:16:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:16:28,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:28,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:28,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:16:28,460 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1706090524, now seen corresponding path program 1 times [2021-12-14 16:16:28,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762613843] [2021-12-14 16:16:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:28,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:28,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:28,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762613843] [2021-12-14 16:16:28,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762613843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:28,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:28,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:28,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413377601] [2021-12-14 16:16:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:28,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:28,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:28,612 INFO L87 Difference]: Start difference. First operand 7141 states and 10598 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:32,091 INFO L93 Difference]: Finished difference Result 36072 states and 56101 transitions. [2021-12-14 16:16:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:16:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:16:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:32,211 INFO L225 Difference]: With dead ends: 36072 [2021-12-14 16:16:32,212 INFO L226 Difference]: Without dead ends: 29893 [2021-12-14 16:16:32,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:16:32,244 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2024 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:32,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2051 Valid, 1700 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:16:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29893 states. [2021-12-14 16:16:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29893 to 24448. [2021-12-14 16:16:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24448 states, 21826 states have (on average 1.4782827820031155) internal successors, (32265), 22070 states have internal predecessors, (32265), 1655 states have call successors, (1655), 829 states have call predecessors, (1655), 965 states have return successors, (3315), 1580 states have call predecessors, (3315), 1654 states have call successors, (3315) [2021-12-14 16:16:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24448 states to 24448 states and 37235 transitions. [2021-12-14 16:16:33,834 INFO L78 Accepts]: Start accepts. Automaton has 24448 states and 37235 transitions. Word has length 101 [2021-12-14 16:16:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:33,834 INFO L470 AbstractCegarLoop]: Abstraction has 24448 states and 37235 transitions. [2021-12-14 16:16:33,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24448 states and 37235 transitions. [2021-12-14 16:16:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:33,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:33,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:33,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:16:33,845 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 924470242, now seen corresponding path program 1 times [2021-12-14 16:16:33,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:33,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042129888] [2021-12-14 16:16:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:33,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:33,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042129888] [2021-12-14 16:16:33,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042129888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995845240] [2021-12-14 16:16:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:33,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:33,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:33,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:16:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:34,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:34,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995845240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:34,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:34,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:34,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249096170] [2021-12-14 16:16:34,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:34,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:34,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:34,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:34,161 INFO L87 Difference]: Start difference. First operand 24448 states and 37235 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:35,607 INFO L93 Difference]: Finished difference Result 24827 states and 37703 transitions. [2021-12-14 16:16:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:35,675 INFO L225 Difference]: With dead ends: 24827 [2021-12-14 16:16:35,676 INFO L226 Difference]: Without dead ends: 23501 [2021-12-14 16:16:35,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:35,697 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 62 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:35,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 814 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23501 states. [2021-12-14 16:16:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23501 to 23501. [2021-12-14 16:16:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23501 states, 20982 states have (on average 1.4873224668763703) internal successors, (31207), 21210 states have internal predecessors, (31207), 1598 states have call successors, (1598), 792 states have call predecessors, (1598), 920 states have return successors, (3223), 1530 states have call predecessors, (3223), 1598 states have call successors, (3223) [2021-12-14 16:16:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23501 states to 23501 states and 36028 transitions. [2021-12-14 16:16:37,228 INFO L78 Accepts]: Start accepts. Automaton has 23501 states and 36028 transitions. Word has length 103 [2021-12-14 16:16:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:37,228 INFO L470 AbstractCegarLoop]: Abstraction has 23501 states and 36028 transitions. [2021-12-14 16:16:37,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 23501 states and 36028 transitions. [2021-12-14 16:16:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 16:16:37,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:37,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 16:16:37,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:37,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:37,501 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -270482580, now seen corresponding path program 1 times [2021-12-14 16:16:37,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:37,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683424869] [2021-12-14 16:16:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:37,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 16:16:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 16:16:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 16:16:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683424869] [2021-12-14 16:16:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683424869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876092453] [2021-12-14 16:16:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:37,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:37,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:37,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:16:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 16:16:38,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:38,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876092453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:38,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:38,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:38,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815941136] [2021-12-14 16:16:38,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:38,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:38,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:38,033 INFO L87 Difference]: Start difference. First operand 23501 states and 36028 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:40,344 INFO L93 Difference]: Finished difference Result 69812 states and 108170 transitions. [2021-12-14 16:16:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-14 16:16:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:40,500 INFO L225 Difference]: With dead ends: 69812 [2021-12-14 16:16:40,500 INFO L226 Difference]: Without dead ends: 46326 [2021-12-14 16:16:40,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:40,569 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 245 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:40,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 588 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46326 states. [2021-12-14 16:16:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46326 to 46060. [2021-12-14 16:16:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 41159 states have (on average 1.4870866639131175) internal successors, (61207), 41614 states have internal predecessors, (61207), 3060 states have call successors, (3060), 1584 states have call predecessors, (3060), 1840 states have return successors, (6180), 2893 states have call predecessors, (6180), 3060 states have call successors, (6180) [2021-12-14 16:16:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 70447 transitions. [2021-12-14 16:16:43,555 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 70447 transitions. Word has length 164 [2021-12-14 16:16:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:43,555 INFO L470 AbstractCegarLoop]: Abstraction has 46060 states and 70447 transitions. [2021-12-14 16:16:43,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 70447 transitions. [2021-12-14 16:16:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 16:16:43,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:43,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 16:16:43,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:43,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-14 16:16:43,836 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1216300980, now seen corresponding path program 1 times [2021-12-14 16:16:43,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:43,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635223865] [2021-12-14 16:16:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:43,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 16:16:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 16:16:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 16:16:43,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635223865] [2021-12-14 16:16:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635223865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895590497] [2021-12-14 16:16:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:43,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:43,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:43,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:16:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 16:16:44,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:44,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895590497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:44,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:44,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 16:16:44,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939826357] [2021-12-14 16:16:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:44,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:44,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:44,355 INFO L87 Difference]: Start difference. First operand 46060 states and 70447 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:48,843 INFO L93 Difference]: Finished difference Result 137213 states and 212194 transitions. [2021-12-14 16:16:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-14 16:16:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,138 INFO L225 Difference]: With dead ends: 137213 [2021-12-14 16:16:49,138 INFO L226 Difference]: Without dead ends: 91168 [2021-12-14 16:16:49,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:49,260 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 233 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 587 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91168 states. [2021-12-14 16:16:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91168 to 90638. [2021-12-14 16:16:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90638 states, 80977 states have (on average 1.4852982945774726) internal successors, (120275), 81886 states have internal predecessors, (120275), 5980 states have call successors, (5980), 3168 states have call predecessors, (5980), 3680 states have return successors, (12087), 5615 states have call predecessors, (12087), 5980 states have call successors, (12087) [2021-12-14 16:16:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90638 states to 90638 states and 138342 transitions. [2021-12-14 16:16:54,574 INFO L78 Accepts]: Start accepts. Automaton has 90638 states and 138342 transitions. Word has length 164 [2021-12-14 16:16:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:54,574 INFO L470 AbstractCegarLoop]: Abstraction has 90638 states and 138342 transitions. [2021-12-14 16:16:54,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:16:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 90638 states and 138342 transitions. [2021-12-14 16:16:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 16:16:54,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:54,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 16:16:54,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:55,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:55,136 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -557777620, now seen corresponding path program 1 times [2021-12-14 16:16:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576157559] [2021-12-14 16:16:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:55,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:16:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:16:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:16:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:16:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 16:16:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 16:16:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 16:16:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 16:16:55,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576157559] [2021-12-14 16:16:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576157559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424602292] [2021-12-14 16:16:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:55,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:55,254 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:55,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:16:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:55,374 INFO L286 TraceCheckSpWp]: Computing forward predicates...