./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label44+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label44+token_ring.02.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 8d5f2743e51cbbe46f8de63e434497edb332f77d30ade744101224af0fe29fdc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:56:42,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:56:42,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:56:42,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:56:42,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:56:42,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:56:42,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:56:42,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:56:42,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:56:42,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:56:42,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:56:42,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:56:42,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:56:42,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:56:42,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:56:42,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:56:42,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:56:42,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:56:42,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:56:42,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:56:42,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:56:42,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:56:42,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:56:42,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:56:42,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:56:42,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:56:42,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:56:42,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:56:42,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:56:42,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:56:42,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:56:42,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:56:42,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:56:42,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:56:42,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:56:42,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:56:42,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:56:42,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:56:42,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:56:42,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:56:42,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:56:42,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:56:42,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:56:42,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:56:42,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:56:42,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:56:42,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:56:42,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:56:42,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:56:42,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:56:42,224 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:56:42,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:56:42,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:56:42,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:56:42,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:56:42,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:56:42,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:56:42,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:56:42,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:56:42,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:56:42,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:56:42,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:56:42,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:56:42,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:56:42,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:56:42,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:56:42,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:56:42,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:56:42,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:56:42,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:56:42,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d5f2743e51cbbe46f8de63e434497edb332f77d30ade744101224af0fe29fdc [2021-12-16 01:56:42,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:56:42,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:56:42,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:56:42,435 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:56:42,435 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:56:42,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label44+token_ring.02.cil-1.c [2021-12-16 01:56:42,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a4f3b85/153c1f0baa2a42688b6343d9f93b86e8/FLAG506f34e6a [2021-12-16 01:56:43,273 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:56:43,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.02.cil-1.c [2021-12-16 01:56:43,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a4f3b85/153c1f0baa2a42688b6343d9f93b86e8/FLAG506f34e6a [2021-12-16 01:56:43,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a4f3b85/153c1f0baa2a42688b6343d9f93b86e8 [2021-12-16 01:56:43,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:56:43,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:56:43,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:56:43,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:56:43,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:56:43,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:56:43" (1/1) ... [2021-12-16 01:56:43,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3585e375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:43, skipping insertion in model container [2021-12-16 01:56:43,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:56:43" (1/1) ... [2021-12-16 01:56:43,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:56:43,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:56:45,251 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/Problem05_label44+token_ring.02.cil-1.c[377340,377353] [2021-12-16 01:56:45,281 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/Problem05_label44+token_ring.02.cil-1.c[383339,383352] [2021-12-16 01:56:45,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:56:45,436 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:56:46,123 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/Problem05_label44+token_ring.02.cil-1.c[377340,377353] [2021-12-16 01:56:46,129 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/Problem05_label44+token_ring.02.cil-1.c[383339,383352] [2021-12-16 01:56:46,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:56:46,185 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:56:46,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46 WrapperNode [2021-12-16 01:56:46,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:56:46,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:56:46,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:56:46,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:56:46,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,500 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-16 01:56:46,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:56:46,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:56:46,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:56:46,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:56:46,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:56:46,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:56:46,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:56:46,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:56:46,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (1/1) ... [2021-12-16 01:56:46,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:56:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:56:46,865 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) [2021-12-16 01:56:46,872 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 [2021-12-16 01:56:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:56:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 01:56:46,893 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 01:56:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:56:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:56:47,077 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:56:47,078 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:56:51,801 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:56:51,824 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:56:51,824 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-16 01:56:51,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:56:51 BoogieIcfgContainer [2021-12-16 01:56:51,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:56:51,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:56:51,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:56:51,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:56:51,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:56:43" (1/3) ... [2021-12-16 01:56:51,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d10529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:56:51, skipping insertion in model container [2021-12-16 01:56:51,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:56:46" (2/3) ... [2021-12-16 01:56:51,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d10529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:56:51, skipping insertion in model container [2021-12-16 01:56:51,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:56:51" (3/3) ... [2021-12-16 01:56:51,834 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.02.cil-1.c [2021-12-16 01:56:51,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:56:51,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 01:56:51,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:56:51,880 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 [2021-12-16 01:56:51,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 01:56:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 01:56:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:51,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:51,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:56:51,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-16 01:56:51,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:51,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23423258] [2021-12-16 01:56:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:51,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:52,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23423258] [2021-12-16 01:56:52,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23423258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:52,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:52,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:56:52,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229890458] [2021-12-16 01:56:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:56:52,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:56:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:56:52,272 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-16 01:56:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:52,956 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-16 01:56:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:56:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:52,983 INFO L225 Difference]: With dead ends: 4802 [2021-12-16 01:56:52,983 INFO L226 Difference]: Without dead ends: 2427 [2021-12-16 01:56:52,993 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 [2021-12-16 01:56:52,997 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:52,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 01:56:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-16 01:56:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-16 01:56:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-16 01:56:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-16 01:56:53,132 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-16 01:56:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:53,133 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-16 01:56:53,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-16 01:56:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-16 01:56:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:53,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:53,137 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] [2021-12-16 01:56:53,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:56:53,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-16 01:56:53,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:53,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548205090] [2021-12-16 01:56:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:53,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:53,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:53,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548205090] [2021-12-16 01:56:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548205090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:53,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:53,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:56:53,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465776296] [2021-12-16 01:56:53,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:56:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:56:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:56:53,257 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:53,919 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-16 01:56:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:56:53,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:53,932 INFO L225 Difference]: With dead ends: 2807 [2021-12-16 01:56:53,932 INFO L226 Difference]: Without dead ends: 2574 [2021-12-16 01:56:53,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:56:53,935 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:53,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:56:53,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-16 01:56:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-16 01:56:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-16 01:56:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-16 01:56:53,988 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-16 01:56:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:53,988 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-16 01:56:53,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-16 01:56:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:53,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:53,990 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] [2021-12-16 01:56:53,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:56:53,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-16 01:56:53,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688707778] [2021-12-16 01:56:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:53,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:54,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688707778] [2021-12-16 01:56:54,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688707778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:54,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:54,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:56:54,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048673946] [2021-12-16 01:56:54,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:54,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:56:54,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:56:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:56:54,107 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:54,712 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-16 01:56:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:56:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:54,723 INFO L225 Difference]: With dead ends: 3193 [2021-12-16 01:56:54,724 INFO L226 Difference]: Without dead ends: 2851 [2021-12-16 01:56:54,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:56:54,731 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20448 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:54,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 01:56:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-16 01:56:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-16 01:56:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-16 01:56:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-16 01:56:54,800 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-16 01:56:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-16 01:56:54,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-16 01:56:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:54,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:54,803 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] [2021-12-16 01:56:54,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:56:54,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-16 01:56:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414203960] [2021-12-16 01:56:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:54,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:54,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414203960] [2021-12-16 01:56:54,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414203960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:54,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:54,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:56:54,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062495409] [2021-12-16 01:56:54,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:54,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:56:54,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:56:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:56:54,903 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:55,664 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-16 01:56:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:56:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:55,678 INFO L225 Difference]: With dead ends: 4037 [2021-12-16 01:56:55,678 INFO L226 Difference]: Without dead ends: 3476 [2021-12-16 01:56:55,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:56:55,690 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20704 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:55,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:56:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-16 01:56:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-16 01:56:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-16 01:56:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-16 01:56:55,774 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-16 01:56:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:55,775 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-16 01:56:55,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-16 01:56:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:55,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:55,776 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] [2021-12-16 01:56:55,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:56:55,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-16 01:56:55,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:55,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931613654] [2021-12-16 01:56:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:55,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:55,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931613654] [2021-12-16 01:56:55,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931613654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:55,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:55,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:56:55,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288791345] [2021-12-16 01:56:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:55,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:56:55,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:56:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:56:55,838 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:56,261 INFO L93 Difference]: Finished difference Result 4308 states and 7182 transitions. [2021-12-16 01:56:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:56:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:56,273 INFO L225 Difference]: With dead ends: 4308 [2021-12-16 01:56:56,273 INFO L226 Difference]: Without dead ends: 3335 [2021-12-16 01:56:56,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:56:56,277 INFO L933 BasicCegarLoop]: 4118 mSDtfsCounter, 4257 mSDsluCounter, 16125 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4267 SdHoareTripleChecker+Valid, 20243 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:56,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4267 Valid, 20243 Invalid, 453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:56:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-16 01:56:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3104. [2021-12-16 01:56:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.75) internal successors, (5145), 2950 states have internal predecessors, (5145), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-16 01:56:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5380 transitions. [2021-12-16 01:56:56,352 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5380 transitions. Word has length 68 [2021-12-16 01:56:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:56,352 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5380 transitions. [2021-12-16 01:56:56,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-16 01:56:56,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5380 transitions. [2021-12-16 01:56:56,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 01:56:56,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:56,354 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] [2021-12-16 01:56:56,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:56:56,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-16 01:56:56,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753742449] [2021-12-16 01:56:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:56,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:56:56,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:56,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753742449] [2021-12-16 01:56:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753742449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:56,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:56:56,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:56:56,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126029925] [2021-12-16 01:56:56,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:56:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:56:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:56:56,425 INFO L87 Difference]: Start difference. First operand 3104 states and 5380 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-16 01:56:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:56,966 INFO L93 Difference]: Finished difference Result 4949 states and 8091 transitions. [2021-12-16 01:56:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:56:56,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-16 01:56:56,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:56,979 INFO L225 Difference]: With dead ends: 4949 [2021-12-16 01:56:56,979 INFO L226 Difference]: Without dead ends: 3977 [2021-12-16 01:56:56,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-16 01:56:56,984 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 4481 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4506 SdHoareTripleChecker+Valid, 16555 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:56,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4506 Valid, 16555 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 01:56:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2021-12-16 01:56:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3634. [2021-12-16 01:56:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3380 states have (on average 1.7044378698224851) internal successors, (5761), 3399 states have internal predecessors, (5761), 156 states have call successors, (156), 84 states have call predecessors, (156), 96 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2021-12-16 01:56:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6118 transitions. [2021-12-16 01:56:57,082 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6118 transitions. Word has length 68 [2021-12-16 01:56:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6118 transitions. [2021-12-16 01:56:57,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-16 01:56:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6118 transitions. [2021-12-16 01:56:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 01:56:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:57,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:56:57,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:56:57,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-16 01:56:57,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589433500] [2021-12-16 01:56:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:57,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:56:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:56:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 01:56:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:56:57,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589433500] [2021-12-16 01:56:57,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589433500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:56:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430039188] [2021-12-16 01:56:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:57,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:56:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:56:57,183 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) [2021-12-16 01:56:57,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:56:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:56:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:56:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 01:56:57,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:56:57,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430039188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:57,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:56:57,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:56:57,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837401194] [2021-12-16 01:56:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:57,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:56:57,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:57,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:56:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:57,438 INFO L87 Difference]: Start difference. First operand 3634 states and 6118 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-16 01:56:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:57,522 INFO L93 Difference]: Finished difference Result 6567 states and 10352 transitions. [2021-12-16 01:56:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:56:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 110 [2021-12-16 01:56:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:57,539 INFO L225 Difference]: With dead ends: 6567 [2021-12-16 01:56:57,539 INFO L226 Difference]: Without dead ends: 5065 [2021-12-16 01:56:57,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:57,546 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4097 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4307 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 [2021-12-16 01:56:57,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:56:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2021-12-16 01:56:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 5035. [2021-12-16 01:56:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 4547 states have (on average 1.633164723993842) internal successors, (7426), 4583 states have internal predecessors, (7426), 294 states have call successors, (294), 168 states have call predecessors, (294), 192 states have return successors, (377), 291 states have call predecessors, (377), 294 states have call successors, (377) [2021-12-16 01:56:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8097 transitions. [2021-12-16 01:56:57,667 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 8097 transitions. Word has length 110 [2021-12-16 01:56:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:57,667 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 8097 transitions. [2021-12-16 01:56:57,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-16 01:56:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 8097 transitions. [2021-12-16 01:56:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 01:56:57,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:57,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:56:57,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 01:56:57,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:56:57,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-16 01:56:57,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:57,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811342995] [2021-12-16 01:56:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:57,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:56:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:56:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 01:56:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:56:57,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811342995] [2021-12-16 01:56:57,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811342995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:56:57,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14526203] [2021-12-16 01:56:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:57,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:56:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:56:57,966 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) [2021-12-16 01:56:57,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:56:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:56:58,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:56:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 01:56:58,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:56:58,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14526203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:58,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:56:58,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:56:58,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129775862] [2021-12-16 01:56:58,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:58,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:56:58,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:56:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:58,198 INFO L87 Difference]: Start difference. First operand 5035 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 01:56:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:58,327 INFO L93 Difference]: Finished difference Result 10695 states and 16311 transitions. [2021-12-16 01:56:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:56:58,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-16 01:56:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:58,350 INFO L225 Difference]: With dead ends: 10695 [2021-12-16 01:56:58,351 INFO L226 Difference]: Without dead ends: 7793 [2021-12-16 01:56:58,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:58,361 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 153 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 8435 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:56:58,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 8435 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:56:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2021-12-16 01:56:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7793. [2021-12-16 01:56:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7793 states, 6840 states have (on average 1.557748538011696) internal successors, (10655), 6901 states have internal predecessors, (10655), 567 states have call successors, (567), 336 states have call predecessors, (567), 384 states have return successors, (836), 571 states have call predecessors, (836), 567 states have call successors, (836) [2021-12-16 01:56:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 12058 transitions. [2021-12-16 01:56:58,558 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 12058 transitions. Word has length 110 [2021-12-16 01:56:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:58,558 INFO L470 AbstractCegarLoop]: Abstraction has 7793 states and 12058 transitions. [2021-12-16 01:56:58,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 01:56:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 12058 transitions. [2021-12-16 01:56:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-16 01:56:58,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:58,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:56:58,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 01:56:58,781 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,SelfDestructingSolverStorable7 [2021-12-16 01:56:58,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:56:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:56:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-16 01:56:58,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:56:58,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571307847] [2021-12-16 01:56:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:58,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:56:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:56:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:56:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:56:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:56:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:56:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:56:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:56:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 01:56:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:56:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 01:56:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 01:56:58,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:56:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571307847] [2021-12-16 01:56:58,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571307847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:56:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156121211] [2021-12-16 01:56:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:56:58,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:56:58,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:56:58,863 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) [2021-12-16 01:56:58,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 01:56:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:56:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:56:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:56:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 01:56:59,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:56:59,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156121211] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:56:59,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:56:59,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:56:59,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841813222] [2021-12-16 01:56:59,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:56:59,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:56:59,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:56:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:56:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:59,129 INFO L87 Difference]: Start difference. First operand 7793 states and 12058 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 01:56:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:56:59,442 INFO L93 Difference]: Finished difference Result 18769 states and 27911 transitions. [2021-12-16 01:56:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:56:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-16 01:56:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:56:59,487 INFO L225 Difference]: With dead ends: 18769 [2021-12-16 01:56:59,487 INFO L226 Difference]: Without dead ends: 13113 [2021-12-16 01:56:59,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:56:59,511 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4055 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 4316 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 [2021-12-16 01:56:59,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 4316 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:56:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-12-16 01:56:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12999. [2021-12-16 01:56:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 11194 states have (on average 1.5019653385742362) internal successors, (16813), 11313 states have internal predecessors, (16813), 1053 states have call successors, (1053), 654 states have call predecessors, (1053), 750 states have return successors, (1534), 1047 states have call predecessors, (1534), 1053 states have call successors, (1534) [2021-12-16 01:56:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19400 transitions. [2021-12-16 01:56:59,946 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19400 transitions. Word has length 142 [2021-12-16 01:56:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:56:59,947 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19400 transitions. [2021-12-16 01:56:59,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 01:56:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19400 transitions. [2021-12-16 01:56:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 01:56:59,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:56:59,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:56:59,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:00,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:00,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-16 01:57:00,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:00,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619814753] [2021-12-16 01:57:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:00,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 01:57:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:57:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 01:57:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 01:57:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 01:57:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619814753] [2021-12-16 01:57:00,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619814753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952365468] [2021-12-16 01:57:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:00,286 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) [2021-12-16 01:57:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 01:57:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:57:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 01:57:00,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:00,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952365468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:00,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:00,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:00,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535877182] [2021-12-16 01:57:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:00,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:00,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:00,543 INFO L87 Difference]: Start difference. First operand 12999 states and 19400 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:00,869 INFO L93 Difference]: Finished difference Result 25185 states and 37088 transitions. [2021-12-16 01:57:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-16 01:57:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:00,910 INFO L225 Difference]: With dead ends: 25185 [2021-12-16 01:57:00,911 INFO L226 Difference]: Without dead ends: 14321 [2021-12-16 01:57:00,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:00,938 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4074 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:00,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 4170 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14321 states. [2021-12-16 01:57:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14321 to 14321. [2021-12-16 01:57:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 12384 states have (on average 1.448562661498708) internal successors, (17939), 12503 states have internal predecessors, (17939), 1091 states have call successors, (1091), 748 states have call predecessors, (1091), 844 states have return successors, (1586), 1085 states have call predecessors, (1586), 1091 states have call successors, (1586) [2021-12-16 01:57:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 20616 transitions. [2021-12-16 01:57:01,302 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 20616 transitions. Word has length 159 [2021-12-16 01:57:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:01,302 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 20616 transitions. [2021-12-16 01:57:01,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 20616 transitions. [2021-12-16 01:57:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 01:57:01,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:01,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:01,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:01,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:01,550 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-16 01:57:01,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:01,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449313046] [2021-12-16 01:57:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:01,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 01:57:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 01:57:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 01:57:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 01:57:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 01:57:01,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449313046] [2021-12-16 01:57:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449313046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:01,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235219353] [2021-12-16 01:57:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:01,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:01,647 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) [2021-12-16 01:57:01,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 01:57:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 01:57:01,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:01,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235219353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:01,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:01,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:01,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632441566] [2021-12-16 01:57:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:01,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:01,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:01,943 INFO L87 Difference]: Start difference. First operand 14321 states and 20616 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:02,311 INFO L93 Difference]: Finished difference Result 23600 states and 33252 transitions. [2021-12-16 01:57:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:02,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-16 01:57:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:02,357 INFO L225 Difference]: With dead ends: 23600 [2021-12-16 01:57:02,357 INFO L226 Difference]: Without dead ends: 15189 [2021-12-16 01:57:02,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:02,379 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4087 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4323 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:02,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4323 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2021-12-16 01:57:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15129. [2021-12-16 01:57:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15129 states, 13112 states have (on average 1.423352654057352) internal successors, (18663), 13231 states have internal predecessors, (18663), 1111 states have call successors, (1111), 808 states have call predecessors, (1111), 904 states have return successors, (1666), 1105 states have call predecessors, (1666), 1111 states have call successors, (1666) [2021-12-16 01:57:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 21440 transitions. [2021-12-16 01:57:02,767 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 21440 transitions. Word has length 159 [2021-12-16 01:57:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:02,768 INFO L470 AbstractCegarLoop]: Abstraction has 15129 states and 21440 transitions. [2021-12-16 01:57:02,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 21440 transitions. [2021-12-16 01:57:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 01:57:02,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:02,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:02,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:03,009 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,SelfDestructingSolverStorable10 [2021-12-16 01:57:03,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-16 01:57:03,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431507282] [2021-12-16 01:57:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:03,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 01:57:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 01:57:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 01:57:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 01:57:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 01:57:03,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:03,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431507282] [2021-12-16 01:57:03,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431507282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:03,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243910205] [2021-12-16 01:57:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:03,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:03,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:03,108 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) [2021-12-16 01:57:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 01:57:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 01:57:03,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243910205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:03,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:03,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:03,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598660598] [2021-12-16 01:57:03,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:03,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:03,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:03,371 INFO L87 Difference]: Start difference. First operand 15129 states and 21440 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:03,879 INFO L93 Difference]: Finished difference Result 39445 states and 54854 transitions. [2021-12-16 01:57:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-16 01:57:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:03,973 INFO L225 Difference]: With dead ends: 39445 [2021-12-16 01:57:03,973 INFO L226 Difference]: Without dead ends: 26455 [2021-12-16 01:57:04,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:04,005 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4101 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:04,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 4332 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26455 states. [2021-12-16 01:57:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26455 to 26061. [2021-12-16 01:57:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26061 states, 22254 states have (on average 1.3790329828345467) internal successors, (30689), 22491 states have internal predecessors, (30689), 2109 states have call successors, (2109), 1504 states have call predecessors, (2109), 1696 states have return successors, (3834), 2097 states have call predecessors, (3834), 2109 states have call successors, (3834) [2021-12-16 01:57:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26061 states to 26061 states and 36632 transitions. [2021-12-16 01:57:04,929 INFO L78 Accepts]: Start accepts. Automaton has 26061 states and 36632 transitions. Word has length 160 [2021-12-16 01:57:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:04,929 INFO L470 AbstractCegarLoop]: Abstraction has 26061 states and 36632 transitions. [2021-12-16 01:57:04,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26061 states and 36632 transitions. [2021-12-16 01:57:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 01:57:04,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:04,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:57:04,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:05,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:05,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:05,183 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-16 01:57:05,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:05,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158819053] [2021-12-16 01:57:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:05,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 01:57:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 01:57:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 01:57:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 01:57:05,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158819053] [2021-12-16 01:57:05,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158819053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551313728] [2021-12-16 01:57:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:05,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:05,264 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) [2021-12-16 01:57:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 01:57:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:57:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 01:57:05,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:05,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551313728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:05,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:05,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:05,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703092824] [2021-12-16 01:57:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:05,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:05,550 INFO L87 Difference]: Start difference. First operand 26061 states and 36632 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:06,236 INFO L93 Difference]: Finished difference Result 52503 states and 73687 transitions. [2021-12-16 01:57:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-16 01:57:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:06,323 INFO L225 Difference]: With dead ends: 52503 [2021-12-16 01:57:06,324 INFO L226 Difference]: Without dead ends: 28589 [2021-12-16 01:57:06,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:06,369 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:06,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28589 states. [2021-12-16 01:57:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28589 to 28509. [2021-12-16 01:57:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28509 states, 24590 states have (on average 1.3440016266775112) internal successors, (33049), 24827 states have internal predecessors, (33049), 2109 states have call successors, (2109), 1616 states have call predecessors, (2109), 1808 states have return successors, (3774), 2097 states have call predecessors, (3774), 2109 states have call successors, (3774) [2021-12-16 01:57:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 38932 transitions. [2021-12-16 01:57:07,310 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 38932 transitions. Word has length 160 [2021-12-16 01:57:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:07,311 INFO L470 AbstractCegarLoop]: Abstraction has 28509 states and 38932 transitions. [2021-12-16 01:57:07,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 38932 transitions. [2021-12-16 01:57:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 01:57:07,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:07,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:07,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:07,570 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-16 01:57:07,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408629777] [2021-12-16 01:57:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:07,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 01:57:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 01:57:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 01:57:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 01:57:07,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:07,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408629777] [2021-12-16 01:57:07,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408629777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:07,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579287557] [2021-12-16 01:57:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:07,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:07,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:07,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 01:57:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 01:57:07,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:07,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579287557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:07,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:07,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:07,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200294725] [2021-12-16 01:57:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:07,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:07,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:07,925 INFO L87 Difference]: Start difference. First operand 28509 states and 38932 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:09,059 INFO L93 Difference]: Finished difference Result 78523 states and 106744 transitions. [2021-12-16 01:57:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-16 01:57:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:09,232 INFO L225 Difference]: With dead ends: 78523 [2021-12-16 01:57:09,232 INFO L226 Difference]: Without dead ends: 52161 [2021-12-16 01:57:09,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:09,303 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:09,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52161 states. [2021-12-16 01:57:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52161 to 50647. [2021-12-16 01:57:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50647 states, 43260 states have (on average 1.3100554785020804) internal successors, (56673), 43733 states have internal predecessors, (56673), 3993 states have call successors, (3993), 3008 states have call predecessors, (3993), 3392 states have return successors, (8324), 3969 states have call predecessors, (8324), 3993 states have call successors, (8324) [2021-12-16 01:57:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50647 states to 50647 states and 68990 transitions. [2021-12-16 01:57:11,440 INFO L78 Accepts]: Start accepts. Automaton has 50647 states and 68990 transitions. Word has length 160 [2021-12-16 01:57:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:11,441 INFO L470 AbstractCegarLoop]: Abstraction has 50647 states and 68990 transitions. [2021-12-16 01:57:11,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:57:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50647 states and 68990 transitions. [2021-12-16 01:57:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 01:57:11,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:11,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:11,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 01:57:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 01:57:11,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-16 01:57:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221155074] [2021-12-16 01:57:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:11,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 01:57:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 01:57:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 01:57:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 01:57:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-16 01:57:11,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221155074] [2021-12-16 01:57:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221155074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:11,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:57:11,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:57:11,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650861163] [2021-12-16 01:57:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:57:11,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:57:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:57:11,801 INFO L87 Difference]: Start difference. First operand 50647 states and 68990 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 01:57:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:13,428 INFO L93 Difference]: Finished difference Result 96777 states and 129475 transitions. [2021-12-16 01:57:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:57:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-16 01:57:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:13,552 INFO L225 Difference]: With dead ends: 96777 [2021-12-16 01:57:13,553 INFO L226 Difference]: Without dead ends: 48275 [2021-12-16 01:57:13,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:13,613 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:13,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:57:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48275 states. [2021-12-16 01:57:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48275 to 45869. [2021-12-16 01:57:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45869 states, 39502 states have (on average 1.3101868259834946) internal successors, (51755), 40355 states have internal predecessors, (51755), 3045 states have call successors, (3045), 2312 states have call predecessors, (3045), 3320 states have return successors, (6785), 3233 states have call predecessors, (6785), 3045 states have call successors, (6785) [2021-12-16 01:57:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 61585 transitions. [2021-12-16 01:57:15,388 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 61585 transitions. Word has length 160 [2021-12-16 01:57:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:15,388 INFO L470 AbstractCegarLoop]: Abstraction has 45869 states and 61585 transitions. [2021-12-16 01:57:15,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 01:57:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 61585 transitions. [2021-12-16 01:57:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 01:57:15,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:15,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:15,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:57:15,444 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-16 01:57:15,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:15,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378554717] [2021-12-16 01:57:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:15,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 01:57:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 01:57:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 01:57:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 01:57:15,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:15,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378554717] [2021-12-16 01:57:15,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378554717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:15,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:57:15,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:57:15,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708923301] [2021-12-16 01:57:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:15,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:57:15,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:57:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:57:15,529 INFO L87 Difference]: Start difference. First operand 45869 states and 61585 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 01:57:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:16,723 INFO L93 Difference]: Finished difference Result 81932 states and 108692 transitions. [2021-12-16 01:57:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 01:57:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-16 01:57:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:16,814 INFO L225 Difference]: With dead ends: 81932 [2021-12-16 01:57:16,815 INFO L226 Difference]: Without dead ends: 38200 [2021-12-16 01:57:16,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:16,879 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:16,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:57:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38200 states. [2021-12-16 01:57:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38200 to 35792. [2021-12-16 01:57:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3250524955580683) internal successors, (41017), 31577 states have internal predecessors, (41017), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-16 01:57:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 48195 transitions. [2021-12-16 01:57:18,209 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 48195 transitions. Word has length 160 [2021-12-16 01:57:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:18,210 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 48195 transitions. [2021-12-16 01:57:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 01:57:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 48195 transitions. [2021-12-16 01:57:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 01:57:18,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:18,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:18,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:57:18,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:18,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-16 01:57:18,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:18,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103232539] [2021-12-16 01:57:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:18,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 01:57:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 01:57:18,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:18,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103232539] [2021-12-16 01:57:18,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103232539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062692387] [2021-12-16 01:57:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:18,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:18,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:18,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 01:57:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 01:57:18,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:18,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062692387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:18,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:18,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:18,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776140441] [2021-12-16 01:57:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:18,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:18,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:18,690 INFO L87 Difference]: Start difference. First operand 35792 states and 48195 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:19,975 INFO L93 Difference]: Finished difference Result 59772 states and 81983 transitions. [2021-12-16 01:57:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-16 01:57:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:20,052 INFO L225 Difference]: With dead ends: 59772 [2021-12-16 01:57:20,052 INFO L226 Difference]: Without dead ends: 35962 [2021-12-16 01:57:20,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:20,090 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 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 [2021-12-16 01:57:20,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35962 states. [2021-12-16 01:57:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35962 to 35792. [2021-12-16 01:57:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3027620739783556) internal successors, (40327), 31577 states have internal predecessors, (40327), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-16 01:57:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 47505 transitions. [2021-12-16 01:57:21,458 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 47505 transitions. Word has length 162 [2021-12-16 01:57:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:21,458 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 47505 transitions. [2021-12-16 01:57:21,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 47505 transitions. [2021-12-16 01:57:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 01:57:21,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:21,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:21,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:21,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 01:57:21,708 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-16 01:57:21,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:21,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544561816] [2021-12-16 01:57:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:21,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 01:57:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 01:57:21,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544561816] [2021-12-16 01:57:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544561816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116226034] [2021-12-16 01:57:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:21,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:21,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:21,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 01:57:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:57:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 01:57:22,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116226034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:22,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:22,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:22,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462395464] [2021-12-16 01:57:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:22,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:22,057 INFO L87 Difference]: Start difference. First operand 35792 states and 47505 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:23,117 INFO L93 Difference]: Finished difference Result 62057 states and 83039 transitions. [2021-12-16 01:57:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-16 01:57:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:23,224 INFO L225 Difference]: With dead ends: 62057 [2021-12-16 01:57:23,224 INFO L226 Difference]: Without dead ends: 30866 [2021-12-16 01:57:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:23,294 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 4110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:23,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4167 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30866 states. [2021-12-16 01:57:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30866 to 29554. [2021-12-16 01:57:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2758755015387013) internal successors, (32753), 26155 states have internal predecessors, (32753), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-16 01:57:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 38215 transitions. [2021-12-16 01:57:24,499 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 38215 transitions. Word has length 162 [2021-12-16 01:57:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:24,499 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 38215 transitions. [2021-12-16 01:57:24,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 38215 transitions. [2021-12-16 01:57:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 01:57:24,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:24,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:24,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:24,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 01:57:24,732 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-16 01:57:24,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:24,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270327908] [2021-12-16 01:57:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:24,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 01:57:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 01:57:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 01:57:24,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270327908] [2021-12-16 01:57:24,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270327908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076573176] [2021-12-16 01:57:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:24,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:24,818 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:24,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 01:57:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:24,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 01:57:25,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:25,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076573176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:25,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:25,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:25,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365477606] [2021-12-16 01:57:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:25,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:25,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:25,080 INFO L87 Difference]: Start difference. First operand 29554 states and 38215 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:25,923 INFO L93 Difference]: Finished difference Result 49138 states and 64365 transitions. [2021-12-16 01:57:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-16 01:57:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:25,996 INFO L225 Difference]: With dead ends: 49138 [2021-12-16 01:57:25,996 INFO L226 Difference]: Without dead ends: 29688 [2021-12-16 01:57:26,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:26,033 INFO L933 BasicCegarLoop]: 4271 mSDtfsCounter, 123 mSDsluCounter, 4114 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 8385 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 [2021-12-16 01:57:26,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 8385 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-12-16 01:57:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29554. [2021-12-16 01:57:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2505551010868294) internal successors, (32103), 26155 states have internal predecessors, (32103), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-16 01:57:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37565 transitions. [2021-12-16 01:57:27,254 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37565 transitions. Word has length 162 [2021-12-16 01:57:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37565 transitions. [2021-12-16 01:57:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37565 transitions. [2021-12-16 01:57:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 01:57:27,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:27,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 01:57:27,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:27,480 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943992, now seen corresponding path program 1 times [2021-12-16 01:57:27,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:27,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645564241] [2021-12-16 01:57:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:27,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:57:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 01:57:27,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645564241] [2021-12-16 01:57:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645564241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:27,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179902438] [2021-12-16 01:57:27,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:27,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:27,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:27,563 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 01:57:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:57:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 01:57:27,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:27,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179902438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:27,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:27,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:27,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451747906] [2021-12-16 01:57:27,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:27,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:27,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:27,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:27,804 INFO L87 Difference]: Start difference. First operand 29554 states and 37565 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:28,649 INFO L93 Difference]: Finished difference Result 42489 states and 54427 transitions. [2021-12-16 01:57:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-16 01:57:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:28,719 INFO L225 Difference]: With dead ends: 42489 [2021-12-16 01:57:28,719 INFO L226 Difference]: Without dead ends: 29599 [2021-12-16 01:57:28,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:28,753 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 144 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 8365 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:28,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 8365 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2021-12-16 01:57:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 29554. [2021-12-16 01:57:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2412060301507537) internal successors, (31863), 26155 states have internal predecessors, (31863), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-16 01:57:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37325 transitions. [2021-12-16 01:57:29,788 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37325 transitions. Word has length 163 [2021-12-16 01:57:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:29,789 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37325 transitions. [2021-12-16 01:57:29,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 01:57:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37325 transitions. [2021-12-16 01:57:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 01:57:29,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:29,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:57:29,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:30,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:30,014 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1712947354, now seen corresponding path program 1 times [2021-12-16 01:57:30,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35898082] [2021-12-16 01:57:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:30,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:57:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:57:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 01:57:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:57:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 01:57:30,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:30,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35898082] [2021-12-16 01:57:30,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35898082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763676908] [2021-12-16 01:57:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:30,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:30,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:30,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 01:57:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:57:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 01:57:30,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763676908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:57:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709053328] [2021-12-16 01:57:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:57:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:57:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:30,394 INFO L87 Difference]: Start difference. First operand 29554 states and 37325 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:31,406 INFO L93 Difference]: Finished difference Result 49006 states and 60989 transitions. [2021-12-16 01:57:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:57:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-16 01:57:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:31,486 INFO L225 Difference]: With dead ends: 49006 [2021-12-16 01:57:31,487 INFO L226 Difference]: Without dead ends: 29556 [2021-12-16 01:57:31,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:57:31,524 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 125 mSDsluCounter, 4126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 8393 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:31,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 8393 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:57:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29556 states. [2021-12-16 01:57:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29556 to 29554. [2021-12-16 01:57:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.238206536558763) internal successors, (31786), 26155 states have internal predecessors, (31786), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3556), 1972 states have call predecessors, (3556), 1873 states have call successors, (3556) [2021-12-16 01:57:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37215 transitions. [2021-12-16 01:57:32,637 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37215 transitions. Word has length 163 [2021-12-16 01:57:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:32,638 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37215 transitions. [2021-12-16 01:57:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 01:57:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37215 transitions. [2021-12-16 01:57:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-16 01:57:32,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:32,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:57:32,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 01:57:32,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 01:57:32,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -349035639, now seen corresponding path program 1 times [2021-12-16 01:57:32,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663680860] [2021-12-16 01:57:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:32,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 01:57:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 01:57:32,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663680860] [2021-12-16 01:57:32,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663680860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141290166] [2021-12-16 01:57:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:32,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:32,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:32,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:32,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 01:57:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 01:57:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-16 01:57:33,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:33,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141290166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:33,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:33,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 01:57:33,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070809063] [2021-12-16 01:57:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:33,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:57:33,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:57:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:57:33,280 INFO L87 Difference]: Start difference. First operand 29554 states and 37215 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 01:57:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:34,135 INFO L93 Difference]: Finished difference Result 40044 states and 50254 transitions. [2021-12-16 01:57:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:57:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-16 01:57:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:34,185 INFO L225 Difference]: With dead ends: 40044 [2021-12-16 01:57:34,185 INFO L226 Difference]: Without dead ends: 22379 [2021-12-16 01:57:34,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:57:34,207 INFO L933 BasicCegarLoop]: 4109 mSDtfsCounter, 4132 mSDsluCounter, 8085 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 12194 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:34,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 12194 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:57:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22379 states. [2021-12-16 01:57:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22379 to 22289. [2021-12-16 01:57:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 19452 states have (on average 1.2401295496607032) internal successors, (24123), 19779 states have internal predecessors, (24123), 1387 states have call successors, (1387), 1056 states have call predecessors, (1387), 1448 states have return successors, (2523), 1457 states have call predecessors, (2523), 1387 states have call successors, (2523) [2021-12-16 01:57:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 28033 transitions. [2021-12-16 01:57:35,064 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 28033 transitions. Word has length 164 [2021-12-16 01:57:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 22289 states and 28033 transitions. [2021-12-16 01:57:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 01:57:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 28033 transitions. [2021-12-16 01:57:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-16 01:57:35,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:35,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:57:35,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-16 01:57:35,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:35,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1441670841, now seen corresponding path program 1 times [2021-12-16 01:57:35,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035539486] [2021-12-16 01:57:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:35,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:57:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:57:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:57:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:57:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:57:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 01:57:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:57:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:57:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 01:57:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 01:57:35,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035539486] [2021-12-16 01:57:35,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035539486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:57:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812612210] [2021-12-16 01:57:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:35,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:57:35,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:35,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:57:35,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 01:57:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 01:57:35,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:57:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-16 01:57:35,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:57:35,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812612210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:35,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:57:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-16 01:57:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625512612] [2021-12-16 01:57:35,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:35,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:57:35,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:57:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:57:35,702 INFO L87 Difference]: Start difference. First operand 22289 states and 28033 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)