./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.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 f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:12:08,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:12:08,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:12:08,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:12:08,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:12:08,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:12:08,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:12:08,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:12:08,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:12:08,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:12:08,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:12:08,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:12:08,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:12:08,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:12:08,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:12:08,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:12:08,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:12:08,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:12:08,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:12:08,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:12:08,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:12:08,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:12:08,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:12:08,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:12:08,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:12:08,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:12:08,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:12:08,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:12:08,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:12:08,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:12:08,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:12:08,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:12:08,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:12:08,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:12:08,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:12:08,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:12:08,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:12:08,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:12:08,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:12:08,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:12:08,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:12:08,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:12:08,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:12:08,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:12:08,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:12:08,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:12:08,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:12:08,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:12:08,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:12:08,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:12:08,274 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:12:08,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:12:08,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:12:08,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:12:08,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:12:08,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:12:08,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:12:08,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:12:08,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:12:08,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:12:08,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:08,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:12:08,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:12:08,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:12:08,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:12:08,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 [2021-12-22 13:12:08,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:12:08,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:12:08,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:12:08,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:12:08,497 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:12:08,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-22 13:12:08,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04202b0cc/9a155508d4a74663903a906132998810/FLAGa66aa418f [2021-12-22 13:12:08,856 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:12:08,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-22 13:12:08,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04202b0cc/9a155508d4a74663903a906132998810/FLAGa66aa418f [2021-12-22 13:12:09,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04202b0cc/9a155508d4a74663903a906132998810 [2021-12-22 13:12:09,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:12:09,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:12:09,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:09,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:12:09,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:12:09,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3503935a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09, skipping insertion in model container [2021-12-22 13:12:09,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:12:09,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:12:09,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[914,927] [2021-12-22 13:12:09,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[7115,7128] [2021-12-22 13:12:09,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:09,563 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:12:09,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[914,927] [2021-12-22 13:12:09,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[7115,7128] [2021-12-22 13:12:09,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:12:09,651 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:12:09,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09 WrapperNode [2021-12-22 13:12:09,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:12:09,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:09,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:12:09,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:12:09,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,717 INFO L137 Inliner]: procedures = 55, calls = 60, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 402 [2021-12-22 13:12:09,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:12:09,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:12:09,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:12:09,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:12:09,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:12:09,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:12:09,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:12:09,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:12:09,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (1/1) ... [2021-12-22 13:12:09,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:12:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:09,817 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) [2021-12-22 13:12:09,848 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 [2021-12-22 13:12:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:12:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:12:09,869 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:12:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:12:09,869 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:12:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:12:09,869 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:12:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:12:09,870 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:12:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:12:09,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:12:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:12:09,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:12:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:12:09,870 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:12:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:12:09,871 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:12:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:12:09,871 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:12:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:12:09,871 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:12:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:12:09,871 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:12:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:12:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:12:09,872 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:12:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:12:09,872 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:12:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:12:09,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:12:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:12:09,873 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:12:09,942 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:12:09,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:12:10,256 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:12:10,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:12:10,264 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-22 13:12:10,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:10 BoogieIcfgContainer [2021-12-22 13:12:10,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:12:10,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:12:10,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:12:10,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:12:10,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:12:09" (1/3) ... [2021-12-22 13:12:10,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85a4578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:10, skipping insertion in model container [2021-12-22 13:12:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:12:09" (2/3) ... [2021-12-22 13:12:10,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85a4578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:12:10, skipping insertion in model container [2021-12-22 13:12:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:12:10" (3/3) ... [2021-12-22 13:12:10,274 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2021-12-22 13:12:10,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:12:10,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:12:10,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:12:10,312 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 [2021-12-22 13:12:10,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:12:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 162 states have (on average 1.5308641975308641) internal successors, (248), 168 states have internal predecessors, (248), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-22 13:12:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 13:12:10,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:10,333 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] [2021-12-22 13:12:10,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674214, now seen corresponding path program 1 times [2021-12-22 13:12:10,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:10,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738998878] [2021-12-22 13:12:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:10,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:10,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:10,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738998878] [2021-12-22 13:12:10,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738998878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:10,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:10,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:10,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261231494] [2021-12-22 13:12:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:10,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:10,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:10,639 INFO L87 Difference]: Start difference. First operand has 208 states, 162 states have (on average 1.5308641975308641) internal successors, (248), 168 states have internal predecessors, (248), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-12-22 13:12:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:11,178 INFO L93 Difference]: Finished difference Result 530 states and 790 transitions. [2021-12-22 13:12:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2021-12-22 13:12:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:11,189 INFO L225 Difference]: With dead ends: 530 [2021-12-22 13:12:11,189 INFO L226 Difference]: Without dead ends: 329 [2021-12-22 13:12:11,192 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 [2021-12-22 13:12:11,194 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 516 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:11,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 775 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:12:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-22 13:12:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 288. [2021-12-22 13:12:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 227 states have (on average 1.4317180616740088) internal successors, (325), 232 states have internal predecessors, (325), 39 states have call successors, (39), 20 states have call predecessors, (39), 20 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-12-22 13:12:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 404 transitions. [2021-12-22 13:12:11,244 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 404 transitions. Word has length 57 [2021-12-22 13:12:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:11,244 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 404 transitions. [2021-12-22 13:12:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-12-22 13:12:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 404 transitions. [2021-12-22 13:12:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 13:12:11,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:11,247 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] [2021-12-22 13:12:11,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:12:11,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:11,248 INFO L85 PathProgramCache]: Analyzing trace with hash -604187876, now seen corresponding path program 1 times [2021-12-22 13:12:11,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:11,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944130779] [2021-12-22 13:12:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:11,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:11,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:11,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944130779] [2021-12-22 13:12:11,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944130779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:11,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:11,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:11,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027508117] [2021-12-22 13:12:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:11,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:11,322 INFO L87 Difference]: Start difference. First operand 288 states and 404 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:11,929 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2021-12-22 13:12:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:11,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-22 13:12:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:11,933 INFO L225 Difference]: With dead ends: 620 [2021-12-22 13:12:11,933 INFO L226 Difference]: Without dead ends: 437 [2021-12-22 13:12:11,934 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 [2021-12-22 13:12:11,935 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 493 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:11,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1059 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-22 13:12:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 373. [2021-12-22 13:12:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 295 states have (on average 1.423728813559322) internal successors, (420), 301 states have internal predecessors, (420), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-22 13:12:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 521 transitions. [2021-12-22 13:12:11,958 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 521 transitions. Word has length 57 [2021-12-22 13:12:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:11,958 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 521 transitions. [2021-12-22 13:12:11,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 521 transitions. [2021-12-22 13:12:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 13:12:11,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:11,960 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] [2021-12-22 13:12:11,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:12:11,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1641391578, now seen corresponding path program 1 times [2021-12-22 13:12:11,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:11,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944586261] [2021-12-22 13:12:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:11,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:12,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944586261] [2021-12-22 13:12:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944586261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:12,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:12,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:12,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54256709] [2021-12-22 13:12:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:12,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:12,032 INFO L87 Difference]: Start difference. First operand 373 states and 521 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:12,388 INFO L93 Difference]: Finished difference Result 703 states and 997 transitions. [2021-12-22 13:12:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-22 13:12:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:12,391 INFO L225 Difference]: With dead ends: 703 [2021-12-22 13:12:12,391 INFO L226 Difference]: Without dead ends: 435 [2021-12-22 13:12:12,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:12,393 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 436 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:12,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 689 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-22 13:12:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 373. [2021-12-22 13:12:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 295 states have (on average 1.4135593220338982) internal successors, (417), 301 states have internal predecessors, (417), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-22 13:12:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 518 transitions. [2021-12-22 13:12:12,428 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 518 transitions. Word has length 57 [2021-12-22 13:12:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:12,428 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 518 transitions. [2021-12-22 13:12:12,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 518 transitions. [2021-12-22 13:12:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 13:12:12,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:12,430 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] [2021-12-22 13:12:12,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:12:12,430 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 743998300, now seen corresponding path program 1 times [2021-12-22 13:12:12,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:12,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665531049] [2021-12-22 13:12:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:12,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:12,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:12,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665531049] [2021-12-22 13:12:12,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665531049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:12,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:12,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:12,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164404442] [2021-12-22 13:12:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:12,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:12,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:12,493 INFO L87 Difference]: Start difference. First operand 373 states and 518 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:12,886 INFO L93 Difference]: Finished difference Result 739 states and 1054 transitions. [2021-12-22 13:12:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-22 13:12:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:12,888 INFO L225 Difference]: With dead ends: 739 [2021-12-22 13:12:12,889 INFO L226 Difference]: Without dead ends: 472 [2021-12-22 13:12:12,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:12:12,890 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 267 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:12,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1025 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-22 13:12:12,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 382. [2021-12-22 13:12:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 304 states have (on average 1.4013157894736843) internal successors, (426), 310 states have internal predecessors, (426), 49 states have call successors, (49), 26 states have call predecessors, (49), 27 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-22 13:12:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 527 transitions. [2021-12-22 13:12:12,906 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 527 transitions. Word has length 57 [2021-12-22 13:12:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:12,907 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 527 transitions. [2021-12-22 13:12:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 527 transitions. [2021-12-22 13:12:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 13:12:12,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:12,908 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] [2021-12-22 13:12:12,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:12:12,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash 671611742, now seen corresponding path program 1 times [2021-12-22 13:12:12,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:12,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880495996] [2021-12-22 13:12:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:12,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:13,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880495996] [2021-12-22 13:12:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880495996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:13,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:13,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:13,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782546792] [2021-12-22 13:12:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:13,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:13,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:13,024 INFO L87 Difference]: Start difference. First operand 382 states and 527 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:13,713 INFO L93 Difference]: Finished difference Result 1537 states and 2220 transitions. [2021-12-22 13:12:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:12:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-22 13:12:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:13,719 INFO L225 Difference]: With dead ends: 1537 [2021-12-22 13:12:13,719 INFO L226 Difference]: Without dead ends: 1261 [2021-12-22 13:12:13,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:12:13,721 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 938 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:13,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 976 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-12-22 13:12:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1090. [2021-12-22 13:12:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 865 states have (on average 1.3734104046242774) internal successors, (1188), 886 states have internal predecessors, (1188), 136 states have call successors, (136), 80 states have call predecessors, (136), 87 states have return successors, (187), 126 states have call predecessors, (187), 134 states have call successors, (187) [2021-12-22 13:12:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1511 transitions. [2021-12-22 13:12:13,827 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1511 transitions. Word has length 57 [2021-12-22 13:12:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:13,828 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1511 transitions. [2021-12-22 13:12:13,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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) [2021-12-22 13:12:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1511 transitions. [2021-12-22 13:12:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:13,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:13,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:13,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:12:13,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1385451018, now seen corresponding path program 1 times [2021-12-22 13:12:13,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:13,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744563732] [2021-12-22 13:12:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:13,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:13,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744563732] [2021-12-22 13:12:13,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744563732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:13,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:13,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:13,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009721319] [2021-12-22 13:12:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:13,938 INFO L87 Difference]: Start difference. First operand 1090 states and 1511 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:14,455 INFO L93 Difference]: Finished difference Result 1313 states and 1826 transitions. [2021-12-22 13:12:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:14,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:14,460 INFO L225 Difference]: With dead ends: 1313 [2021-12-22 13:12:14,460 INFO L226 Difference]: Without dead ends: 1225 [2021-12-22 13:12:14,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:14,464 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 532 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:14,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 940 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:12:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-12-22 13:12:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1186. [2021-12-22 13:12:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 941 states have (on average 1.3740701381509033) internal successors, (1293), 964 states have internal predecessors, (1293), 147 states have call successors, (147), 87 states have call predecessors, (147), 96 states have return successors, (203), 138 states have call predecessors, (203), 145 states have call successors, (203) [2021-12-22 13:12:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1643 transitions. [2021-12-22 13:12:14,529 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1643 transitions. Word has length 65 [2021-12-22 13:12:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:14,530 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1643 transitions. [2021-12-22 13:12:14,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1643 transitions. [2021-12-22 13:12:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:14,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:14,534 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] [2021-12-22 13:12:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:12:14,534 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1789236969, now seen corresponding path program 1 times [2021-12-22 13:12:14,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:14,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426847686] [2021-12-22 13:12:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:14,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:14,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:14,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426847686] [2021-12-22 13:12:14,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426847686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:14,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:14,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913880221] [2021-12-22 13:12:14,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:14,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:14,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:14,624 INFO L87 Difference]: Start difference. First operand 1186 states and 1643 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:15,225 INFO L93 Difference]: Finished difference Result 1533 states and 2120 transitions. [2021-12-22 13:12:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:15,230 INFO L225 Difference]: With dead ends: 1533 [2021-12-22 13:12:15,230 INFO L226 Difference]: Without dead ends: 1356 [2021-12-22 13:12:15,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:12:15,231 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 706 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:15,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1088 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:12:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-12-22 13:12:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1282. [2021-12-22 13:12:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1017 states have (on average 1.3736479842674534) internal successors, (1397), 1042 states have internal predecessors, (1397), 158 states have call successors, (158), 94 states have call predecessors, (158), 105 states have return successors, (222), 150 states have call predecessors, (222), 156 states have call successors, (222) [2021-12-22 13:12:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1777 transitions. [2021-12-22 13:12:15,283 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1777 transitions. Word has length 65 [2021-12-22 13:12:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:15,284 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1777 transitions. [2021-12-22 13:12:15,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1777 transitions. [2021-12-22 13:12:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:15,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:15,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:15,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:12:15,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash -239349141, now seen corresponding path program 1 times [2021-12-22 13:12:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430530448] [2021-12-22 13:12:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:15,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430530448] [2021-12-22 13:12:15,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430530448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:15,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:15,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:15,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299838672] [2021-12-22 13:12:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:15,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:15,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:15,382 INFO L87 Difference]: Start difference. First operand 1282 states and 1777 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:15,789 INFO L93 Difference]: Finished difference Result 1583 states and 2191 transitions. [2021-12-22 13:12:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:15,793 INFO L225 Difference]: With dead ends: 1583 [2021-12-22 13:12:15,794 INFO L226 Difference]: Without dead ends: 1316 [2021-12-22 13:12:15,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:15,795 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 305 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:15,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1211 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-12-22 13:12:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1287. [2021-12-22 13:12:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1021 states have (on average 1.3702252693437806) internal successors, (1399), 1046 states have internal predecessors, (1399), 158 states have call successors, (158), 94 states have call predecessors, (158), 106 states have return successors, (223), 151 states have call predecessors, (223), 156 states have call successors, (223) [2021-12-22 13:12:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1780 transitions. [2021-12-22 13:12:15,854 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1780 transitions. Word has length 65 [2021-12-22 13:12:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:15,854 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1780 transitions. [2021-12-22 13:12:15,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1780 transitions. [2021-12-22 13:12:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:15,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:15,855 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] [2021-12-22 13:12:15,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:12:15,856 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1268708439, now seen corresponding path program 1 times [2021-12-22 13:12:15,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:15,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113118148] [2021-12-22 13:12:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:15,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:15,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113118148] [2021-12-22 13:12:15,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113118148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:15,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:15,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:15,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270098951] [2021-12-22 13:12:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:15,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:15,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:15,941 INFO L87 Difference]: Start difference. First operand 1287 states and 1780 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:12:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:17,057 INFO L93 Difference]: Finished difference Result 2949 states and 4052 transitions. [2021-12-22 13:12:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:12:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-22 13:12:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:17,066 INFO L225 Difference]: With dead ends: 2949 [2021-12-22 13:12:17,066 INFO L226 Difference]: Without dead ends: 2677 [2021-12-22 13:12:17,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:12:17,068 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1324 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:17,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 1545 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:12:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-12-22 13:12:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2427. [2021-12-22 13:12:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1921 states have (on average 1.3430504945340969) internal successors, (2580), 1966 states have internal predecessors, (2580), 275 states have call successors, (275), 196 states have call predecessors, (275), 229 states have return successors, (409), 269 states have call predecessors, (409), 273 states have call successors, (409) [2021-12-22 13:12:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3264 transitions. [2021-12-22 13:12:17,184 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3264 transitions. Word has length 65 [2021-12-22 13:12:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:17,184 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 3264 transitions. [2021-12-22 13:12:17,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:12:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3264 transitions. [2021-12-22 13:12:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:17,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:17,186 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] [2021-12-22 13:12:17,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:12:17,186 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -217259350, now seen corresponding path program 1 times [2021-12-22 13:12:17,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059087902] [2021-12-22 13:12:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:17,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:17,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:17,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059087902] [2021-12-22 13:12:17,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059087902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:17,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:17,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:17,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344391278] [2021-12-22 13:12:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:17,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:17,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:17,260 INFO L87 Difference]: Start difference. First operand 2427 states and 3264 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:17,738 INFO L93 Difference]: Finished difference Result 4028 states and 5388 transitions. [2021-12-22 13:12:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 13:12:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:17,746 INFO L225 Difference]: With dead ends: 4028 [2021-12-22 13:12:17,746 INFO L226 Difference]: Without dead ends: 2616 [2021-12-22 13:12:17,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:17,749 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 206 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:17,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1324 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-12-22 13:12:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2472. [2021-12-22 13:12:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1957 states have (on average 1.3321410321921308) internal successors, (2607), 2002 states have internal predecessors, (2607), 275 states have call successors, (275), 196 states have call predecessors, (275), 238 states have return successors, (421), 278 states have call predecessors, (421), 273 states have call successors, (421) [2021-12-22 13:12:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3303 transitions. [2021-12-22 13:12:17,874 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3303 transitions. Word has length 65 [2021-12-22 13:12:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3303 transitions. [2021-12-22 13:12:17,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3303 transitions. [2021-12-22 13:12:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:17,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:17,876 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] [2021-12-22 13:12:17,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:12:17,877 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1168944044, now seen corresponding path program 1 times [2021-12-22 13:12:17,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:17,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935963147] [2021-12-22 13:12:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:17,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:17,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:17,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935963147] [2021-12-22 13:12:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935963147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:17,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:17,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:17,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447031709] [2021-12-22 13:12:17,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:17,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:17,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:17,951 INFO L87 Difference]: Start difference. First operand 2472 states and 3303 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:18,523 INFO L93 Difference]: Finished difference Result 3907 states and 5142 transitions. [2021-12-22 13:12:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:12:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:18,532 INFO L225 Difference]: With dead ends: 3907 [2021-12-22 13:12:18,532 INFO L226 Difference]: Without dead ends: 2670 [2021-12-22 13:12:18,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:12:18,535 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 680 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:18,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 852 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:12:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-12-22 13:12:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2450. [2021-12-22 13:12:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 1943 states have (on average 1.3293875450334534) internal successors, (2583), 1982 states have internal predecessors, (2583), 275 states have call successors, (275), 196 states have call predecessors, (275), 230 states have return successors, (405), 276 states have call predecessors, (405), 273 states have call successors, (405) [2021-12-22 13:12:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3263 transitions. [2021-12-22 13:12:18,630 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3263 transitions. Word has length 65 [2021-12-22 13:12:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:18,631 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 3263 transitions. [2021-12-22 13:12:18,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3263 transitions. [2021-12-22 13:12:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:12:18,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:18,633 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] [2021-12-22 13:12:18,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:12:18,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1034930538, now seen corresponding path program 1 times [2021-12-22 13:12:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706885970] [2021-12-22 13:12:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:18,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:18,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706885970] [2021-12-22 13:12:18,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706885970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:18,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:18,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:18,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981830877] [2021-12-22 13:12:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:18,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:18,707 INFO L87 Difference]: Start difference. First operand 2450 states and 3263 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:19,108 INFO L93 Difference]: Finished difference Result 5525 states and 7242 transitions. [2021-12-22 13:12:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:12:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:12:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:19,122 INFO L225 Difference]: With dead ends: 5525 [2021-12-22 13:12:19,122 INFO L226 Difference]: Without dead ends: 4093 [2021-12-22 13:12:19,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:19,127 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 653 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:19,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 655 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-12-22 13:12:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 3821. [2021-12-22 13:12:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3821 states, 3009 states have (on average 1.296111665004985) internal successors, (3900), 3069 states have internal predecessors, (3900), 427 states have call successors, (427), 319 states have call predecessors, (427), 383 states have return successors, (677), 440 states have call predecessors, (677), 425 states have call successors, (677) [2021-12-22 13:12:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5004 transitions. [2021-12-22 13:12:19,284 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5004 transitions. Word has length 65 [2021-12-22 13:12:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:19,285 INFO L470 AbstractCegarLoop]: Abstraction has 3821 states and 5004 transitions. [2021-12-22 13:12:19,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:12:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5004 transitions. [2021-12-22 13:12:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:12:19,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:19,286 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] [2021-12-22 13:12:19,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:12:19,287 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1593552473, now seen corresponding path program 1 times [2021-12-22 13:12:19,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524831509] [2021-12-22 13:12:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:19,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:19,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:19,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524831509] [2021-12-22 13:12:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524831509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:19,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:19,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:19,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113750767] [2021-12-22 13:12:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:19,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:19,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:19,327 INFO L87 Difference]: Start difference. First operand 3821 states and 5004 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:19,776 INFO L93 Difference]: Finished difference Result 8839 states and 11518 transitions. [2021-12-22 13:12:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 13:12:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:19,796 INFO L225 Difference]: With dead ends: 8839 [2021-12-22 13:12:19,796 INFO L226 Difference]: Without dead ends: 6015 [2021-12-22 13:12:19,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:19,802 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 377 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:19,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 797 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-12-22 13:12:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5499. [2021-12-22 13:12:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 4294 states have (on average 1.2808570097810899) internal successors, (5500), 4361 states have internal predecessors, (5500), 621 states have call successors, (621), 493 states have call predecessors, (621), 582 states have return successors, (998), 652 states have call predecessors, (998), 619 states have call successors, (998) [2021-12-22 13:12:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 7119 transitions. [2021-12-22 13:12:20,066 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 7119 transitions. Word has length 66 [2021-12-22 13:12:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:20,067 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 7119 transitions. [2021-12-22 13:12:20,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:12:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 7119 transitions. [2021-12-22 13:12:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 13:12:20,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:20,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:20,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:12:20,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -455119352, now seen corresponding path program 1 times [2021-12-22 13:12:20,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:20,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463009606] [2021-12-22 13:12:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:20,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:20,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:20,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463009606] [2021-12-22 13:12:20,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463009606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:20,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:20,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256915569] [2021-12-22 13:12:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:20,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:20,115 INFO L87 Difference]: Start difference. First operand 5499 states and 7119 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:20,591 INFO L93 Difference]: Finished difference Result 7129 states and 9121 transitions. [2021-12-22 13:12:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:12:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-22 13:12:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:20,625 INFO L225 Difference]: With dead ends: 7129 [2021-12-22 13:12:20,626 INFO L226 Difference]: Without dead ends: 7126 [2021-12-22 13:12:20,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:12:20,629 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 918 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:20,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 557 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-12-22 13:12:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6553. [2021-12-22 13:12:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6553 states, 5097 states have (on average 1.2693741416519522) internal successors, (6470), 5173 states have internal predecessors, (6470), 747 states have call successors, (747), 607 states have call predecessors, (747), 707 states have return successors, (1191), 780 states have call predecessors, (1191), 746 states have call successors, (1191) [2021-12-22 13:12:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6553 states to 6553 states and 8408 transitions. [2021-12-22 13:12:20,949 INFO L78 Accepts]: Start accepts. Automaton has 6553 states and 8408 transitions. Word has length 73 [2021-12-22 13:12:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 6553 states and 8408 transitions. [2021-12-22 13:12:20,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6553 states and 8408 transitions. [2021-12-22 13:12:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 13:12:20,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:20,952 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:20,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:12:20,952 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1224424688, now seen corresponding path program 1 times [2021-12-22 13:12:20,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58139178] [2021-12-22 13:12:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:20,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:21,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58139178] [2021-12-22 13:12:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58139178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857693123] [2021-12-22 13:12:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:21,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:21,037 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) [2021-12-22 13:12:21,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:12:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:12:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:21,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:12:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857693123] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:12:21,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:12:21,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-22 13:12:21,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099336568] [2021-12-22 13:12:21,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:12:21,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:12:21,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:21,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:12:21,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:21,651 INFO L87 Difference]: Start difference. First operand 6553 states and 8408 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:23,108 INFO L93 Difference]: Finished difference Result 14199 states and 17936 transitions. [2021-12-22 13:12:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:12:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-22 13:12:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:23,140 INFO L225 Difference]: With dead ends: 14199 [2021-12-22 13:12:23,140 INFO L226 Difference]: Without dead ends: 14196 [2021-12-22 13:12:23,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-22 13:12:23,146 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1211 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:23,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 1280 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14196 states. [2021-12-22 13:12:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14196 to 11811. [2021-12-22 13:12:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 9189 states have (on average 1.2600935901621504) internal successors, (11579), 9317 states have internal predecessors, (11579), 1313 states have call successors, (1313), 1097 states have call predecessors, (1313), 1307 states have return successors, (2130), 1404 states have call predecessors, (2130), 1312 states have call successors, (2130) [2021-12-22 13:12:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 15022 transitions. [2021-12-22 13:12:23,731 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 15022 transitions. Word has length 74 [2021-12-22 13:12:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 11811 states and 15022 transitions. [2021-12-22 13:12:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:12:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 15022 transitions. [2021-12-22 13:12:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:12:23,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:23,734 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:23,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:12:23,971 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -499209592, now seen corresponding path program 2 times [2021-12-22 13:12:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162830666] [2021-12-22 13:12:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:23,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:12:24,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:24,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162830666] [2021-12-22 13:12:24,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162830666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:24,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:24,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:24,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281255226] [2021-12-22 13:12:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:24,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:24,068 INFO L87 Difference]: Start difference. First operand 11811 states and 15022 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:24,695 INFO L93 Difference]: Finished difference Result 18354 states and 23364 transitions. [2021-12-22 13:12:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:12:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-22 13:12:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:24,719 INFO L225 Difference]: With dead ends: 18354 [2021-12-22 13:12:24,719 INFO L226 Difference]: Without dead ends: 8416 [2021-12-22 13:12:24,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:24,741 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 423 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:24,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 802 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8416 states. [2021-12-22 13:12:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8416 to 7864. [2021-12-22 13:12:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 6136 states have (on average 1.2416883963494132) internal successors, (7619), 6220 states have internal predecessors, (7619), 880 states have call successors, (880), 721 states have call predecessors, (880), 846 states have return successors, (1349), 930 states have call predecessors, (1349), 879 states have call successors, (1349) [2021-12-22 13:12:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 9848 transitions. [2021-12-22 13:12:25,194 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 9848 transitions. Word has length 77 [2021-12-22 13:12:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:25,194 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 9848 transitions. [2021-12-22 13:12:25,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:12:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 9848 transitions. [2021-12-22 13:12:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 13:12:25,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:25,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:25,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:12:25,197 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash 867535010, now seen corresponding path program 1 times [2021-12-22 13:12:25,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:25,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440627087] [2021-12-22 13:12:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:25,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:12:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:12:25,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440627087] [2021-12-22 13:12:25,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440627087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:25,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:25,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:12:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135455580] [2021-12-22 13:12:25,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:25,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:12:25,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:12:25,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:25,255 INFO L87 Difference]: Start difference. First operand 7864 states and 9848 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:26,409 INFO L93 Difference]: Finished difference Result 21738 states and 27065 transitions. [2021-12-22 13:12:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:12:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-22 13:12:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:26,444 INFO L225 Difference]: With dead ends: 21738 [2021-12-22 13:12:26,444 INFO L226 Difference]: Without dead ends: 14895 [2021-12-22 13:12:26,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:12:26,456 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 765 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:26,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1066 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14895 states. [2021-12-22 13:12:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14895 to 14036. [2021-12-22 13:12:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14036 states, 10812 states have (on average 1.212171661117277) internal successors, (13106), 11002 states have internal predecessors, (13106), 1596 states have call successors, (1596), 1325 states have call predecessors, (1596), 1626 states have return successors, (2752), 1722 states have call predecessors, (2752), 1595 states have call successors, (2752) [2021-12-22 13:12:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14036 states to 14036 states and 17454 transitions. [2021-12-22 13:12:27,122 INFO L78 Accepts]: Start accepts. Automaton has 14036 states and 17454 transitions. Word has length 84 [2021-12-22 13:12:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:27,122 INFO L470 AbstractCegarLoop]: Abstraction has 14036 states and 17454 transitions. [2021-12-22 13:12:27,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 14036 states and 17454 transitions. [2021-12-22 13:12:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 13:12:27,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:27,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:27,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:12:27,127 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash 260386383, now seen corresponding path program 1 times [2021-12-22 13:12:27,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913678800] [2021-12-22 13:12:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:27,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:12:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:12:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 13:12:27,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913678800] [2021-12-22 13:12:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913678800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533191615] [2021-12-22 13:12:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:27,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:27,183 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) [2021-12-22 13:12:27,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:12:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:12:27,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533191615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:27,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:27,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:27,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478779568] [2021-12-22 13:12:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:27,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:27,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:27,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:27,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:27,358 INFO L87 Difference]: Start difference. First operand 14036 states and 17454 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-22 13:12:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:27,932 INFO L93 Difference]: Finished difference Result 15912 states and 20081 transitions. [2021-12-22 13:12:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 92 [2021-12-22 13:12:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:27,964 INFO L225 Difference]: With dead ends: 15912 [2021-12-22 13:12:27,964 INFO L226 Difference]: Without dead ends: 14282 [2021-12-22 13:12:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:27,970 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 113 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 624 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 [2021-12-22 13:12:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 624 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14282 states. [2021-12-22 13:12:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14282 to 14282. [2021-12-22 13:12:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14282 states, 11010 states have (on average 1.2143505903723888) internal successors, (13370), 11202 states have internal predecessors, (13370), 1624 states have call successors, (1624), 1343 states have call predecessors, (1624), 1646 states have return successors, (2794), 1750 states have call predecessors, (2794), 1623 states have call successors, (2794) [2021-12-22 13:12:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14282 states to 14282 states and 17788 transitions. [2021-12-22 13:12:28,760 INFO L78 Accepts]: Start accepts. Automaton has 14282 states and 17788 transitions. Word has length 92 [2021-12-22 13:12:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:28,761 INFO L470 AbstractCegarLoop]: Abstraction has 14282 states and 17788 transitions. [2021-12-22 13:12:28,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-22 13:12:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 14282 states and 17788 transitions. [2021-12-22 13:12:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:12:28,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:28,766 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:28,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:28,981 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,SelfDestructingSolverStorable17 [2021-12-22 13:12:28,981 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1083636890, now seen corresponding path program 1 times [2021-12-22 13:12:28,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:28,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614972390] [2021-12-22 13:12:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:28,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:12:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 13:12:29,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614972390] [2021-12-22 13:12:29,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614972390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:29,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:29,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:12:29,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425899738] [2021-12-22 13:12:29,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:29,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:12:29,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:12:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:29,052 INFO L87 Difference]: Start difference. First operand 14282 states and 17788 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:30,401 INFO L93 Difference]: Finished difference Result 25156 states and 31107 transitions. [2021-12-22 13:12:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:12:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-22 13:12:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:30,436 INFO L225 Difference]: With dead ends: 25156 [2021-12-22 13:12:30,436 INFO L226 Difference]: Without dead ends: 12757 [2021-12-22 13:12:30,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:12:30,458 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 1520 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:30,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1555 Valid, 931 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:12:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12757 states. [2021-12-22 13:12:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12757 to 11857. [2021-12-22 13:12:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11857 states, 9176 states have (on average 1.207606800348736) internal successors, (11081), 9335 states have internal predecessors, (11081), 1325 states have call successors, (1325), 1092 states have call predecessors, (1325), 1354 states have return successors, (2126), 1440 states have call predecessors, (2126), 1324 states have call successors, (2126) [2021-12-22 13:12:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11857 states to 11857 states and 14532 transitions. [2021-12-22 13:12:30,986 INFO L78 Accepts]: Start accepts. Automaton has 11857 states and 14532 transitions. Word has length 93 [2021-12-22 13:12:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:30,988 INFO L470 AbstractCegarLoop]: Abstraction has 11857 states and 14532 transitions. [2021-12-22 13:12:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:12:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11857 states and 14532 transitions. [2021-12-22 13:12:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 13:12:30,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:30,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:12:30,995 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1789084765, now seen corresponding path program 1 times [2021-12-22 13:12:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98311156] [2021-12-22 13:12:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:30,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 13:12:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 13:12:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-22 13:12:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-22 13:12:31,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98311156] [2021-12-22 13:12:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98311156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596094028] [2021-12-22 13:12:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:31,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:31,072 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) [2021-12-22 13:12:31,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:12:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:31,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:12:31,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:31,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596094028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:31,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:31,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:12:31,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987986985] [2021-12-22 13:12:31,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:31,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:31,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:31,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:31,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:31,330 INFO L87 Difference]: Start difference. First operand 11857 states and 14532 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-12-22 13:12:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:31,839 INFO L93 Difference]: Finished difference Result 13574 states and 16943 transitions. [2021-12-22 13:12:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 118 [2021-12-22 13:12:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:31,866 INFO L225 Difference]: With dead ends: 13574 [2021-12-22 13:12:31,867 INFO L226 Difference]: Without dead ends: 12576 [2021-12-22 13:12:31,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:31,873 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 196 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 406 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 [2021-12-22 13:12:31,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 406 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12576 states. [2021-12-22 13:12:32,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12576 to 12550. [2021-12-22 13:12:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12550 states, 9734 states have (on average 1.216046846106431) internal successors, (11837), 9902 states have internal predecessors, (11837), 1403 states have call successors, (1403), 1143 states have call predecessors, (1403), 1411 states have return successors, (2230), 1515 states have call predecessors, (2230), 1402 states have call successors, (2230) [2021-12-22 13:12:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12550 states to 12550 states and 15470 transitions. [2021-12-22 13:12:32,418 INFO L78 Accepts]: Start accepts. Automaton has 12550 states and 15470 transitions. Word has length 118 [2021-12-22 13:12:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:32,419 INFO L470 AbstractCegarLoop]: Abstraction has 12550 states and 15470 transitions. [2021-12-22 13:12:32,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-12-22 13:12:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12550 states and 15470 transitions. [2021-12-22 13:12:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 13:12:32,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:32,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:32,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:32,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:32,645 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2070810004, now seen corresponding path program 1 times [2021-12-22 13:12:32,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:32,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971818978] [2021-12-22 13:12:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:32,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:12:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:12:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:12:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:12:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 13:12:32,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971818978] [2021-12-22 13:12:32,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971818978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723901699] [2021-12-22 13:12:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:32,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:32,724 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) [2021-12-22 13:12:32,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:12:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:12:32,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:32,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723901699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:32,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:32,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:32,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93595488] [2021-12-22 13:12:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:32,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:32,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:32,972 INFO L87 Difference]: Start difference. First operand 12550 states and 15470 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-12-22 13:12:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:33,557 INFO L93 Difference]: Finished difference Result 14780 states and 18580 transitions. [2021-12-22 13:12:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:33,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 134 [2021-12-22 13:12:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:33,577 INFO L225 Difference]: With dead ends: 14780 [2021-12-22 13:12:33,577 INFO L226 Difference]: Without dead ends: 12856 [2021-12-22 13:12:33,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:33,584 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 247 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 294 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 [2021-12-22 13:12:33,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 294 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12856 states. [2021-12-22 13:12:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12856 to 12790. [2021-12-22 13:12:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12790 states, 9953 states have (on average 1.2065708831508088) internal successors, (12009), 10118 states have internal predecessors, (12009), 1403 states have call successors, (1403), 1161 states have call predecessors, (1403), 1432 states have return successors, (2224), 1521 states have call predecessors, (2224), 1402 states have call successors, (2224) [2021-12-22 13:12:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12790 states to 12790 states and 15636 transitions. [2021-12-22 13:12:34,153 INFO L78 Accepts]: Start accepts. Automaton has 12790 states and 15636 transitions. Word has length 134 [2021-12-22 13:12:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:34,153 INFO L470 AbstractCegarLoop]: Abstraction has 12790 states and 15636 transitions. [2021-12-22 13:12:34,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-12-22 13:12:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12790 states and 15636 transitions. [2021-12-22 13:12:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-22 13:12:34,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:34,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:34,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:34,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:34,379 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -931525195, now seen corresponding path program 1 times [2021-12-22 13:12:34,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337523097] [2021-12-22 13:12:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:34,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 13:12:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:12:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:12:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 13:12:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-22 13:12:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337523097] [2021-12-22 13:12:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337523097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079552868] [2021-12-22 13:12:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:34,448 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) [2021-12-22 13:12:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:12:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:12:34,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:12:34,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:34,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079552868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:34,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:34,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:34,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494864326] [2021-12-22 13:12:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:34,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:34,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:34,691 INFO L87 Difference]: Start difference. First operand 12790 states and 15636 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:12:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:35,202 INFO L93 Difference]: Finished difference Result 15003 states and 18535 transitions. [2021-12-22 13:12:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 134 [2021-12-22 13:12:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:35,232 INFO L225 Difference]: With dead ends: 15003 [2021-12-22 13:12:35,232 INFO L226 Difference]: Without dead ends: 12841 [2021-12-22 13:12:35,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:35,310 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 247 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 405 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 [2021-12-22 13:12:35,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 405 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12841 states. [2021-12-22 13:12:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12841 to 12772. [2021-12-22 13:12:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12772 states, 9935 states have (on average 1.2015098137896325) internal successors, (11937), 10100 states have internal predecessors, (11937), 1403 states have call successors, (1403), 1161 states have call predecessors, (1403), 1432 states have return successors, (2224), 1521 states have call predecessors, (2224), 1402 states have call successors, (2224) [2021-12-22 13:12:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12772 states to 12772 states and 15564 transitions. [2021-12-22 13:12:36,101 INFO L78 Accepts]: Start accepts. Automaton has 12772 states and 15564 transitions. Word has length 134 [2021-12-22 13:12:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 12772 states and 15564 transitions. [2021-12-22 13:12:36,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 13:12:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12772 states and 15564 transitions. [2021-12-22 13:12:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-22 13:12:36,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:36,111 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:12:36,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:36,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 13:12:36,329 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash -564892461, now seen corresponding path program 1 times [2021-12-22 13:12:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:36,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955105361] [2021-12-22 13:12:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:36,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 13:12:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-22 13:12:36,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955105361] [2021-12-22 13:12:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955105361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559888171] [2021-12-22 13:12:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:36,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:36,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:36,428 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) [2021-12-22 13:12:36,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:12:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:12:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 13:12:36,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:36,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559888171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:36,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:36,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:36,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340893068] [2021-12-22 13:12:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:36,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:36,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:36,712 INFO L87 Difference]: Start difference. First operand 12772 states and 15564 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:12:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:37,356 INFO L93 Difference]: Finished difference Result 13697 states and 16818 transitions. [2021-12-22 13:12:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:37,356 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-22 13:12:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:37,386 INFO L225 Difference]: With dead ends: 13697 [2021-12-22 13:12:37,386 INFO L226 Difference]: Without dead ends: 12606 [2021-12-22 13:12:37,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:37,394 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 75 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 623 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 [2021-12-22 13:12:37,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 623 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2021-12-22 13:12:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 12568. [2021-12-22 13:12:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 9773 states have (on average 1.1971758927657832) internal successors, (11700), 9936 states have internal predecessors, (11700), 1381 states have call successors, (1381), 1146 states have call predecessors, (1381), 1412 states have return successors, (2184), 1496 states have call predecessors, (2184), 1380 states have call successors, (2184) [2021-12-22 13:12:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 15265 transitions. [2021-12-22 13:12:37,987 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 15265 transitions. Word has length 135 [2021-12-22 13:12:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:37,987 INFO L470 AbstractCegarLoop]: Abstraction has 12568 states and 15265 transitions. [2021-12-22 13:12:37,987 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-22 13:12:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 15265 transitions. [2021-12-22 13:12:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 13:12:37,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:37,995 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:12:38,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:38,212 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1386105035, now seen corresponding path program 1 times [2021-12-22 13:12:38,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580996060] [2021-12-22 13:12:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:38,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:12:38,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580996060] [2021-12-22 13:12:38,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580996060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519693407] [2021-12-22 13:12:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:38,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:38,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:38,297 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) [2021-12-22 13:12:38,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:12:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:12:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 13:12:38,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:38,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519693407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:38,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:38,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:12:38,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426877830] [2021-12-22 13:12:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:38,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:38,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:38,567 INFO L87 Difference]: Start difference. First operand 12568 states and 15265 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-12-22 13:12:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:39,284 INFO L93 Difference]: Finished difference Result 13904 states and 16977 transitions. [2021-12-22 13:12:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:12:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 136 [2021-12-22 13:12:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:39,313 INFO L225 Difference]: With dead ends: 13904 [2021-12-22 13:12:39,314 INFO L226 Difference]: Without dead ends: 12561 [2021-12-22 13:12:39,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:39,322 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 300 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:39,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 478 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:12:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12561 states. [2021-12-22 13:12:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12561 to 12002. [2021-12-22 13:12:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 9315 states have (on average 1.191196994095545) internal successors, (11096), 9468 states have internal predecessors, (11096), 1323 states have call successors, (1323), 1103 states have call predecessors, (1323), 1362 states have return successors, (2092), 1440 states have call predecessors, (2092), 1322 states have call successors, (2092) [2021-12-22 13:12:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 14511 transitions. [2021-12-22 13:12:39,930 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 14511 transitions. Word has length 136 [2021-12-22 13:12:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:39,931 INFO L470 AbstractCegarLoop]: Abstraction has 12002 states and 14511 transitions. [2021-12-22 13:12:39,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-12-22 13:12:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 14511 transitions. [2021-12-22 13:12:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 13:12:39,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:39,938 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:12:39,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:40,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:40,140 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash 78962637, now seen corresponding path program 1 times [2021-12-22 13:12:40,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745741661] [2021-12-22 13:12:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:40,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:12:40,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745741661] [2021-12-22 13:12:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745741661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251475812] [2021-12-22 13:12:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:40,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:40,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:40,270 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) [2021-12-22 13:12:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:12:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:12:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 13:12:40,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:40,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251475812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:40,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:40,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:12:40,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29400357] [2021-12-22 13:12:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:40,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:40,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:40,540 INFO L87 Difference]: Start difference. First operand 12002 states and 14511 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-12-22 13:12:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:41,220 INFO L93 Difference]: Finished difference Result 13122 states and 15882 transitions. [2021-12-22 13:12:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:12:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 136 [2021-12-22 13:12:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:41,242 INFO L225 Difference]: With dead ends: 13122 [2021-12-22 13:12:41,243 INFO L226 Difference]: Without dead ends: 11748 [2021-12-22 13:12:41,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:12:41,248 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 321 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:41,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 488 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-12-22 13:12:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 11726. [2021-12-22 13:12:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 9097 states have (on average 1.1854457513465977) internal successors, (10784), 9246 states have internal predecessors, (10784), 1285 states have call successors, (1285), 1081 states have call predecessors, (1285), 1342 states have return successors, (2043), 1408 states have call predecessors, (2043), 1284 states have call successors, (2043) [2021-12-22 13:12:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 14112 transitions. [2021-12-22 13:12:41,906 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 14112 transitions. Word has length 136 [2021-12-22 13:12:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:41,907 INFO L470 AbstractCegarLoop]: Abstraction has 11726 states and 14112 transitions. [2021-12-22 13:12:41,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-12-22 13:12:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 14112 transitions. [2021-12-22 13:12:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 13:12:41,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:41,914 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:12:41,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:42,115 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,SelfDestructingSolverStorable24 [2021-12-22 13:12:42,116 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1976459403, now seen corresponding path program 1 times [2021-12-22 13:12:42,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816987845] [2021-12-22 13:12:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 13:12:42,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816987845] [2021-12-22 13:12:42,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816987845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015063161] [2021-12-22 13:12:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:42,199 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) [2021-12-22 13:12:42,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:12:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:12:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:12:42,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:42,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015063161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:42,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:42,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 13:12:42,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619357923] [2021-12-22 13:12:42,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:42,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:42,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:42,469 INFO L87 Difference]: Start difference. First operand 11726 states and 14112 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-22 13:12:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:43,028 INFO L93 Difference]: Finished difference Result 12853 states and 15487 transitions. [2021-12-22 13:12:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:12:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 136 [2021-12-22 13:12:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:43,056 INFO L225 Difference]: With dead ends: 12853 [2021-12-22 13:12:43,057 INFO L226 Difference]: Without dead ends: 11754 [2021-12-22 13:12:43,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:12:43,065 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 10 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:43,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1043 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-12-22 13:12:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 11738. [2021-12-22 13:12:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11738 states, 9109 states have (on average 1.1828960368865957) internal successors, (10775), 9258 states have internal predecessors, (10775), 1285 states have call successors, (1285), 1081 states have call predecessors, (1285), 1342 states have return successors, (2043), 1408 states have call predecessors, (2043), 1284 states have call successors, (2043) [2021-12-22 13:12:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11738 states to 11738 states and 14103 transitions. [2021-12-22 13:12:43,695 INFO L78 Accepts]: Start accepts. Automaton has 11738 states and 14103 transitions. Word has length 136 [2021-12-22 13:12:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:43,695 INFO L470 AbstractCegarLoop]: Abstraction has 11738 states and 14103 transitions. [2021-12-22 13:12:43,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-22 13:12:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11738 states and 14103 transitions. [2021-12-22 13:12:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 13:12:43,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:43,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:43,917 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,SelfDestructingSolverStorable25 [2021-12-22 13:12:43,917 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1219164295, now seen corresponding path program 1 times [2021-12-22 13:12:43,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720923568] [2021-12-22 13:12:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:43,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 13:12:43,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720923568] [2021-12-22 13:12:43,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720923568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:43,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:43,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:43,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542702041] [2021-12-22 13:12:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:43,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:43,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:43,978 INFO L87 Difference]: Start difference. First operand 11738 states and 14103 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 13:12:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:45,036 INFO L93 Difference]: Finished difference Result 12713 states and 15200 transitions. [2021-12-22 13:12:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:12:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-22 13:12:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:45,063 INFO L225 Difference]: With dead ends: 12713 [2021-12-22 13:12:45,063 INFO L226 Difference]: Without dead ends: 12711 [2021-12-22 13:12:45,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:12:45,071 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 690 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:45,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 788 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12711 states. [2021-12-22 13:12:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12711 to 12442. [2021-12-22 13:12:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12442 states, 9689 states have (on average 1.1791722571988854) internal successors, (11425), 9844 states have internal predecessors, (11425), 1353 states have call successors, (1353), 1129 states have call predecessors, (1353), 1398 states have return successors, (2122), 1478 states have call predecessors, (2122), 1352 states have call successors, (2122) [2021-12-22 13:12:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 14900 transitions. [2021-12-22 13:12:45,810 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 14900 transitions. Word has length 136 [2021-12-22 13:12:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 12442 states and 14900 transitions. [2021-12-22 13:12:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-22 13:12:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 14900 transitions. [2021-12-22 13:12:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 13:12:45,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:45,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 13:12:45,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:12:45,821 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 114815496, now seen corresponding path program 1 times [2021-12-22 13:12:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112626993] [2021-12-22 13:12:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:45,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:12:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:12:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:12:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:12:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:12:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:12:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 13:12:45,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112626993] [2021-12-22 13:12:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112626993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943960729] [2021-12-22 13:12:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:45,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:45,925 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) [2021-12-22 13:12:45,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:12:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 13:12:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:12:46,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943960729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:46,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:46,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-22 13:12:46,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572672140] [2021-12-22 13:12:46,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:46,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:46,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:12:46,189 INFO L87 Difference]: Start difference. First operand 12442 states and 14900 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:12:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:46,612 INFO L93 Difference]: Finished difference Result 17590 states and 21120 transitions. [2021-12-22 13:12:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-22 13:12:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:46,630 INFO L225 Difference]: With dead ends: 17590 [2021-12-22 13:12:46,631 INFO L226 Difference]: Without dead ends: 7008 [2021-12-22 13:12:46,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:12:46,646 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 34 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:46,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1283 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2021-12-22 13:12:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 6566. [2021-12-22 13:12:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6566 states, 5254 states have (on average 1.159307194518462) internal successors, (6091), 5307 states have internal predecessors, (6091), 655 states have call successors, (655), 523 states have call predecessors, (655), 655 states have return successors, (962), 736 states have call predecessors, (962), 654 states have call successors, (962) [2021-12-22 13:12:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6566 states to 6566 states and 7708 transitions. [2021-12-22 13:12:47,113 INFO L78 Accepts]: Start accepts. Automaton has 6566 states and 7708 transitions. Word has length 145 [2021-12-22 13:12:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:47,113 INFO L470 AbstractCegarLoop]: Abstraction has 6566 states and 7708 transitions. [2021-12-22 13:12:47,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:12:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6566 states and 7708 transitions. [2021-12-22 13:12:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:12:47,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:47,120 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 13:12:47,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 13:12:47,342 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,SelfDestructingSolverStorable27 [2021-12-22 13:12:47,343 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 62040612, now seen corresponding path program 1 times [2021-12-22 13:12:47,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:47,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370718664] [2021-12-22 13:12:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:47,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:12:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:12:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:12:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:12:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:12:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:12:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:12:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:12:47,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370718664] [2021-12-22 13:12:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370718664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:47,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:47,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:47,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292183879] [2021-12-22 13:12:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:47,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:47,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:47,396 INFO L87 Difference]: Start difference. First operand 6566 states and 7708 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:12:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:47,885 INFO L93 Difference]: Finished difference Result 7114 states and 8326 transitions. [2021-12-22 13:12:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:47,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-22 13:12:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:47,900 INFO L225 Difference]: With dead ends: 7114 [2021-12-22 13:12:47,900 INFO L226 Difference]: Without dead ends: 6365 [2021-12-22 13:12:47,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:47,905 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 388 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 551 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:12:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2021-12-22 13:12:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6141. [2021-12-22 13:12:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 4925 states have (on average 1.1595939086294416) internal successors, (5711), 4975 states have internal predecessors, (5711), 609 states have call successors, (609), 483 states have call predecessors, (609), 605 states have return successors, (898), 683 states have call predecessors, (898), 608 states have call successors, (898) [2021-12-22 13:12:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 7218 transitions. [2021-12-22 13:12:48,284 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 7218 transitions. Word has length 147 [2021-12-22 13:12:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:48,284 INFO L470 AbstractCegarLoop]: Abstraction has 6141 states and 7218 transitions. [2021-12-22 13:12:48,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:12:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 7218 transitions. [2021-12-22 13:12:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 13:12:48,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:48,291 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:12:48,291 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash -818503781, now seen corresponding path program 1 times [2021-12-22 13:12:48,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770613229] [2021-12-22 13:12:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:48,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:12:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:12:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 13:12:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 13:12:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:12:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 13:12:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:12:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:12:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 13:12:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770613229] [2021-12-22 13:12:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770613229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159097496] [2021-12-22 13:12:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:48,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:48,404 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) [2021-12-22 13:12:48,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:12:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:12:48,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159097496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:48,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:48,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:12:48,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703886787] [2021-12-22 13:12:48,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:48,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:48,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:48,732 INFO L87 Difference]: Start difference. First operand 6141 states and 7218 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 13:12:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:49,019 INFO L93 Difference]: Finished difference Result 7977 states and 9378 transitions. [2021-12-22 13:12:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 158 [2021-12-22 13:12:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:49,029 INFO L225 Difference]: With dead ends: 7977 [2021-12-22 13:12:49,029 INFO L226 Difference]: Without dead ends: 3937 [2021-12-22 13:12:49,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:49,036 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 171 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 372 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 [2021-12-22 13:12:49,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-12-22 13:12:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3937. [2021-12-22 13:12:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3191 states have (on average 1.144468818552178) internal successors, (3652), 3225 states have internal predecessors, (3652), 380 states have call successors, (380), 295 states have call predecessors, (380), 364 states have return successors, (516), 417 states have call predecessors, (516), 379 states have call successors, (516) [2021-12-22 13:12:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 4548 transitions. [2021-12-22 13:12:49,282 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 4548 transitions. Word has length 158 [2021-12-22 13:12:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:49,283 INFO L470 AbstractCegarLoop]: Abstraction has 3937 states and 4548 transitions. [2021-12-22 13:12:49,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 13:12:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 4548 transitions. [2021-12-22 13:12:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:12:49,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:49,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:49,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:49,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:49,507 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1011844634, now seen corresponding path program 1 times [2021-12-22 13:12:49,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:49,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696078669] [2021-12-22 13:12:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:49,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:12:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:12:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:12:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:12:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:12:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:12:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:12:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 13:12:49,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:49,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696078669] [2021-12-22 13:12:49,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696078669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:49,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:49,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:49,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510989549] [2021-12-22 13:12:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:49,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:49,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:49,573 INFO L87 Difference]: Start difference. First operand 3937 states and 4548 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:12:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:50,086 INFO L93 Difference]: Finished difference Result 5801 states and 6758 transitions. [2021-12-22 13:12:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:12:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-22 13:12:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:50,093 INFO L225 Difference]: With dead ends: 5801 [2021-12-22 13:12:50,093 INFO L226 Difference]: Without dead ends: 4040 [2021-12-22 13:12:50,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:50,096 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 313 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:50,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 827 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:12:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-12-22 13:12:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3496. [2021-12-22 13:12:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 2842 states have (on average 1.145320197044335) internal successors, (3255), 2875 states have internal predecessors, (3255), 336 states have call successors, (336), 259 states have call predecessors, (336), 316 states have return successors, (448), 362 states have call predecessors, (448), 335 states have call successors, (448) [2021-12-22 13:12:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 4039 transitions. [2021-12-22 13:12:50,316 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 4039 transitions. Word has length 159 [2021-12-22 13:12:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:50,317 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 4039 transitions. [2021-12-22 13:12:50,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:12:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 4039 transitions. [2021-12-22 13:12:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:12:50,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:50,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:50,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:12:50,321 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash 978764957, now seen corresponding path program 1 times [2021-12-22 13:12:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:50,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475972785] [2021-12-22 13:12:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:12:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:12:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:12:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:12:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:12:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 13:12:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:12:50,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475972785] [2021-12-22 13:12:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475972785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140702669] [2021-12-22 13:12:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:50,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:50,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:50,416 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) [2021-12-22 13:12:50,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:12:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:12:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:12:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:12:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 13:12:51,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140702669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:12:51,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:12:51,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-22 13:12:51,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137195793] [2021-12-22 13:12:51,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:12:51,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:12:51,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:12:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:12:51,177 INFO L87 Difference]: Start difference. First operand 3496 states and 4039 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:12:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:52,122 INFO L93 Difference]: Finished difference Result 5531 states and 6517 transitions. [2021-12-22 13:12:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:12:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-22 13:12:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:52,129 INFO L225 Difference]: With dead ends: 5531 [2021-12-22 13:12:52,130 INFO L226 Difference]: Without dead ends: 3783 [2021-12-22 13:12:52,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:12:52,134 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 1184 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:52,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1018 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:12:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-12-22 13:12:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3583. [2021-12-22 13:12:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 2887 states have (on average 1.1323172843782474) internal successors, (3269), 2925 states have internal predecessors, (3269), 358 states have call successors, (358), 283 states have call predecessors, (358), 336 states have return successors, (499), 375 states have call predecessors, (499), 357 states have call successors, (499) [2021-12-22 13:12:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4126 transitions. [2021-12-22 13:12:52,358 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4126 transitions. Word has length 162 [2021-12-22 13:12:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:52,359 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4126 transitions. [2021-12-22 13:12:52,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:12:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4126 transitions. [2021-12-22 13:12:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-22 13:12:52,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:52,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:52,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:52,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-22 13:12:52,580 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1575925759, now seen corresponding path program 2 times [2021-12-22 13:12:52,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392074125] [2021-12-22 13:12:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:52,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:12:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 13:12:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:12:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 13:12:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:12:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:12:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:12:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-22 13:12:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:12:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-22 13:12:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-22 13:12:52,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:52,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392074125] [2021-12-22 13:12:52,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392074125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:52,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:52,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:52,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198173543] [2021-12-22 13:12:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:52,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:52,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:52,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:52,640 INFO L87 Difference]: Start difference. First operand 3583 states and 4126 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-22 13:12:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:53,432 INFO L93 Difference]: Finished difference Result 5452 states and 6270 transitions. [2021-12-22 13:12:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:12:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-22 13:12:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:53,436 INFO L225 Difference]: With dead ends: 5452 [2021-12-22 13:12:53,436 INFO L226 Difference]: Without dead ends: 1760 [2021-12-22 13:12:53,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:12:53,440 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 796 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:53,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 714 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:12:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-12-22 13:12:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1760. [2021-12-22 13:12:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1387 states have (on average 1.1391492429704397) internal successors, (1580), 1408 states have internal predecessors, (1580), 180 states have call successors, (180), 156 states have call predecessors, (180), 192 states have return successors, (286), 195 states have call predecessors, (286), 179 states have call successors, (286) [2021-12-22 13:12:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2046 transitions. [2021-12-22 13:12:53,557 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2046 transitions. Word has length 175 [2021-12-22 13:12:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:53,557 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2046 transitions. [2021-12-22 13:12:53,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-22 13:12:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2046 transitions. [2021-12-22 13:12:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:53,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:53,560 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:12:53,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 13:12:53,560 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash -61354190, now seen corresponding path program 1 times [2021-12-22 13:12:53,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835865135] [2021-12-22 13:12:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:53,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:12:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:12:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:12:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:12:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 13:12:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:12:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:12:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 13:12:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:12:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:12:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-22 13:12:53,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:53,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835865135] [2021-12-22 13:12:53,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835865135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:53,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704017162] [2021-12-22 13:12:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:53,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:53,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:53,648 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) [2021-12-22 13:12:53,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:12:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:12:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-22 13:12:54,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:54,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704017162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:54,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:54,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-22 13:12:54,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831125519] [2021-12-22 13:12:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:54,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:12:54,002 INFO L87 Difference]: Start difference. First operand 1760 states and 2046 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 13:12:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:54,213 INFO L93 Difference]: Finished difference Result 3405 states and 3969 transitions. [2021-12-22 13:12:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 179 [2021-12-22 13:12:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:54,216 INFO L225 Difference]: With dead ends: 3405 [2021-12-22 13:12:54,216 INFO L226 Difference]: Without dead ends: 1477 [2021-12-22 13:12:54,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:12:54,219 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:54,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 276 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:12:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-12-22 13:12:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1440. [2021-12-22 13:12:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1143 states have (on average 1.1286089238845145) internal successors, (1290), 1155 states have internal predecessors, (1290), 145 states have call successors, (145), 124 states have call predecessors, (145), 151 states have return successors, (214), 160 states have call predecessors, (214), 144 states have call successors, (214) [2021-12-22 13:12:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1649 transitions. [2021-12-22 13:12:54,320 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1649 transitions. Word has length 179 [2021-12-22 13:12:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 1649 transitions. [2021-12-22 13:12:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 13:12:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1649 transitions. [2021-12-22 13:12:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-22 13:12:54,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:54,322 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 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, 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] [2021-12-22 13:12:54,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:54,540 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,SelfDestructingSolverStorable33 [2021-12-22 13:12:54,540 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1658574142, now seen corresponding path program 1 times [2021-12-22 13:12:54,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:54,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749512954] [2021-12-22 13:12:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:54,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:12:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:12:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:12:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:12:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:12:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:12:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:12:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:12:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:12:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-22 13:12:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-22 13:12:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-22 13:12:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-22 13:12:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-22 13:12:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-22 13:12:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:12:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-12-22 13:12:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-12-22 13:12:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2021-12-22 13:12:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 75 proven. 16 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-22 13:12:54,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749512954] [2021-12-22 13:12:54,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749512954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024363879] [2021-12-22 13:12:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:54,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:54,647 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) [2021-12-22 13:12:54,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:12:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:12:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 256 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 13:12:55,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:12:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 107 proven. 7 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-22 13:12:55,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024363879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:12:55,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:12:55,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2021-12-22 13:12:55,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025243563] [2021-12-22 13:12:55,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:12:55,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:12:55,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:12:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:55,722 INFO L87 Difference]: Start difference. First operand 1440 states and 1649 transitions. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-22 13:12:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:56,190 INFO L93 Difference]: Finished difference Result 1743 states and 1984 transitions. [2021-12-22 13:12:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:12:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 253 [2021-12-22 13:12:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:56,191 INFO L225 Difference]: With dead ends: 1743 [2021-12-22 13:12:56,191 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 13:12:56,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 548 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:12:56,193 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 346 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:56,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 463 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:12:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 13:12:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 13:12:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:12:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 13:12:56,194 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 253 [2021-12-22 13:12:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:56,195 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 13:12:56,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 8 states have internal predecessors, (228), 4 states have call successors, (47), 8 states have call predecessors, (47), 8 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-12-22 13:12:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 13:12:56,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 13:12:56,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-22 13:12:56,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:12:56,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:56,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:56,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.