./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.07.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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:51:35,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:51:35,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:51:35,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:51:35,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:51:35,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:51:35,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:51:35,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:51:35,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:51:35,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:51:35,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:51:35,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:51:35,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:51:35,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:51:35,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:51:35,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:51:35,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:51:35,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:51:35,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:51:35,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:51:35,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:51:35,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:51:35,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:51:35,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:51:35,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:51:35,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:51:35,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:51:35,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:51:35,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:51:35,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:51:35,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:51:35,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:51:35,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:51:35,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:51:35,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:51:35,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:51:35,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:51:35,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:51:35,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:51:35,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:51:35,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:51:35,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:51:35,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:51:35,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:51:35,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:51:35,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:51:35,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:51:35,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:51:35,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:51:35,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:51:35,645 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:51:35,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:51:35,646 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:51:35,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:51:35,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:51:35,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:51:35,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:51:35,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:51:35,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:51:35,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:51:35,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:51:35,648 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:51:35,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:51:35,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:51:35,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:51:35,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:51:35,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:51:35,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:51:35,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:51:35,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:51:35,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:51:35,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:51:35,651 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:51:35,651 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:51:35,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:51:35,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:51:35,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2021-12-21 14:51:35,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:51:35,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:51:35,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:51:35,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:51:35,936 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:51:35,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-12-21 14:51:35,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1fac4ba/7bb5295adde441fd838705a79368f137/FLAG9348cda69 [2021-12-21 14:51:36,466 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:51:36,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-12-21 14:51:36,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1fac4ba/7bb5295adde441fd838705a79368f137/FLAG9348cda69 [2021-12-21 14:51:36,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1fac4ba/7bb5295adde441fd838705a79368f137 [2021-12-21 14:51:36,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:51:36,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:51:36,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:51:36,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:51:36,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:51:36,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:51:36" (1/1) ... [2021-12-21 14:51:36,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dde1098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:36, skipping insertion in model container [2021-12-21 14:51:36,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:51:36" (1/1) ... [2021-12-21 14:51:36,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:51:36,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:51:36,999 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.07.cil-1.c[914,927] [2021-12-21 14:51:37,062 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.07.cil-1.c[7115,7128] [2021-12-21 14:51:37,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:51:37,150 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:51:37,161 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.07.cil-1.c[914,927] [2021-12-21 14:51:37,185 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.07.cil-1.c[7115,7128] [2021-12-21 14:51:37,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:51:37,250 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:51:37,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37 WrapperNode [2021-12-21 14:51:37,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:51:37,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:51:37,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:51:37,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:51:37,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,325 INFO L137 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 750 [2021-12-21 14:51:37,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:51:37,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:51:37,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:51:37,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:51:37,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:51:37,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:51:37,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:51:37,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:51:37,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (1/1) ... [2021-12-21 14:51:37,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:51:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:51:37,440 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) [2021-12-21 14:51:37,464 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 [2021-12-21 14:51:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:51:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:51:37,486 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:51:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:51:37,488 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:51:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:51:37,488 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:51:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:51:37,489 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:51:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:51:37,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:51:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:51:37,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:51:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:51:37,489 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:51:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:51:37,490 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:51:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:51:37,490 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:51:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:51:37,490 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:51:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:51:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:51:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:51:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:51:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:51:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:51:37,492 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:51:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:51:37,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:51:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:51:37,492 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:51:37,657 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:51:37,665 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:51:38,211 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:51:38,225 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:51:38,227 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-21 14:51:38,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:51:38 BoogieIcfgContainer [2021-12-21 14:51:38,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:51:38,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:51:38,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:51:38,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:51:38,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:51:36" (1/3) ... [2021-12-21 14:51:38,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ea84cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:51:38, skipping insertion in model container [2021-12-21 14:51:38,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:37" (2/3) ... [2021-12-21 14:51:38,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ea84cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:51:38, skipping insertion in model container [2021-12-21 14:51:38,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:51:38" (3/3) ... [2021-12-21 14:51:38,237 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-12-21 14:51:38,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:51:38,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:51:38,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:51:38,286 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 [2021-12-21 14:51:38,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:51:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 358 states, 306 states have (on average 1.6143790849673203) internal successors, (494), 312 states have internal predecessors, (494), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-21 14:51:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:38,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:38,316 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] [2021-12-21 14:51:38,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2006337748, now seen corresponding path program 1 times [2021-12-21 14:51:38,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:38,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382670786] [2021-12-21 14:51:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:38,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:38,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382670786] [2021-12-21 14:51:38,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382670786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:38,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:38,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:51:38,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634149615] [2021-12-21 14:51:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:38,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:51:38,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:51:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:51:38,748 INFO L87 Difference]: Start difference. First operand has 358 states, 306 states have (on average 1.6143790849673203) internal successors, (494), 312 states have internal predecessors, (494), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:51:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:39,329 INFO L93 Difference]: Finished difference Result 712 states and 1119 transitions. [2021-12-21 14:51:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 14:51:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:51:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:39,369 INFO L225 Difference]: With dead ends: 712 [2021-12-21 14:51:39,370 INFO L226 Difference]: Without dead ends: 366 [2021-12-21 14:51:39,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:51:39,377 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 770 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:39,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1223 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:51:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-21 14:51:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 348. [2021-12-21 14:51:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 298 states have (on average 1.5201342281879195) internal successors, (453), 302 states have internal predecessors, (453), 35 states have call successors, (35), 14 states have call predecessors, (35), 13 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 14:51:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 521 transitions. [2021-12-21 14:51:39,437 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 521 transitions. Word has length 65 [2021-12-21 14:51:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:39,438 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 521 transitions. [2021-12-21 14:51:39,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:51:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 521 transitions. [2021-12-21 14:51:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:39,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:39,441 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] [2021-12-21 14:51:39,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:51:39,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2047012498, now seen corresponding path program 1 times [2021-12-21 14:51:39,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:39,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882780964] [2021-12-21 14:51:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:39,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:39,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882780964] [2021-12-21 14:51:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882780964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:39,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:39,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:51:39,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202102442] [2021-12-21 14:51:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:39,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:51:39,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:51:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:51:39,569 INFO L87 Difference]: Start difference. First operand 348 states and 521 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) [2021-12-21 14:51:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:40,483 INFO L93 Difference]: Finished difference Result 571 states and 835 transitions. [2021-12-21 14:51:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:40,484 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 [2021-12-21 14:51:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:40,491 INFO L225 Difference]: With dead ends: 571 [2021-12-21 14:51:40,491 INFO L226 Difference]: Without dead ends: 483 [2021-12-21 14:51:40,495 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 [2021-12-21 14:51:40,497 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 652 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:40,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1988 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:51:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-21 14:51:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 444. [2021-12-21 14:51:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 374 states have (on average 1.4893048128342246) internal successors, (557), 380 states have internal predecessors, (557), 46 states have call successors, (46), 21 states have call predecessors, (46), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2021-12-21 14:51:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 652 transitions. [2021-12-21 14:51:40,547 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 652 transitions. Word has length 65 [2021-12-21 14:51:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:40,547 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 652 transitions. [2021-12-21 14:51:40,548 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) [2021-12-21 14:51:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 652 transitions. [2021-12-21 14:51:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:40,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:40,552 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] [2021-12-21 14:51:40,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:51:40,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -368123858, now seen corresponding path program 1 times [2021-12-21 14:51:40,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:40,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904909048] [2021-12-21 14:51:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:40,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:40,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:40,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904909048] [2021-12-21 14:51:40,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904909048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:40,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:40,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:51:40,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815154258] [2021-12-21 14:51:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:40,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:51:40,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:51:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:51:40,657 INFO L87 Difference]: Start difference. First operand 444 states and 652 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) [2021-12-21 14:51:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:41,534 INFO L93 Difference]: Finished difference Result 791 states and 1128 transitions. [2021-12-21 14:51:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:51:41,534 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 [2021-12-21 14:51:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:41,538 INFO L225 Difference]: With dead ends: 791 [2021-12-21 14:51:41,538 INFO L226 Difference]: Without dead ends: 614 [2021-12-21 14:51:41,539 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 [2021-12-21 14:51:41,540 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 1034 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:41,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 1814 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:51:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-21 14:51:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 540. [2021-12-21 14:51:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 450 states have (on average 1.4666666666666666) internal successors, (660), 458 states have internal predecessors, (660), 57 states have call successors, (57), 28 states have call predecessors, (57), 31 states have return successors, (68), 57 states have call predecessors, (68), 55 states have call successors, (68) [2021-12-21 14:51:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 785 transitions. [2021-12-21 14:51:41,574 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 785 transitions. Word has length 65 [2021-12-21 14:51:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 785 transitions. [2021-12-21 14:51:41,575 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) [2021-12-21 14:51:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 785 transitions. [2021-12-21 14:51:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:41,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:41,577 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] [2021-12-21 14:51:41,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:51:41,578 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1898257328, now seen corresponding path program 1 times [2021-12-21 14:51:41,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819205986] [2021-12-21 14:51:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:41,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:41,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:41,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819205986] [2021-12-21 14:51:41,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819205986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:41,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:41,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:51:41,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515242168] [2021-12-21 14:51:41,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:41,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:51:41,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:51:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:41,673 INFO L87 Difference]: Start difference. First operand 540 states and 785 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) [2021-12-21 14:51:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:42,444 INFO L93 Difference]: Finished difference Result 867 states and 1239 transitions. [2021-12-21 14:51:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:51:42,445 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 [2021-12-21 14:51:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:42,448 INFO L225 Difference]: With dead ends: 867 [2021-12-21 14:51:42,448 INFO L226 Difference]: Without dead ends: 600 [2021-12-21 14:51:42,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:51:42,450 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 659 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:42,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 2183 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:51:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-12-21 14:51:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 555. [2021-12-21 14:51:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 470 states have internal predecessors, (672), 57 states have call successors, (57), 28 states have call predecessors, (57), 34 states have return successors, (71), 60 states have call predecessors, (71), 55 states have call successors, (71) [2021-12-21 14:51:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 800 transitions. [2021-12-21 14:51:42,483 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 800 transitions. Word has length 65 [2021-12-21 14:51:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:42,484 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 800 transitions. [2021-12-21 14:51:42,484 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) [2021-12-21 14:51:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 800 transitions. [2021-12-21 14:51:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:42,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:42,486 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] [2021-12-21 14:51:42,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:51:42,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash 512053934, now seen corresponding path program 1 times [2021-12-21 14:51:42,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:42,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244621787] [2021-12-21 14:51:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:42,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:42,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:42,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244621787] [2021-12-21 14:51:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244621787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:42,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:42,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:51:42,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678439784] [2021-12-21 14:51:42,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:42,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:51:42,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:51:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:42,617 INFO L87 Difference]: Start difference. First operand 555 states and 800 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) [2021-12-21 14:51:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:43,396 INFO L93 Difference]: Finished difference Result 873 states and 1232 transitions. [2021-12-21 14:51:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:51:43,399 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 [2021-12-21 14:51:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:43,403 INFO L225 Difference]: With dead ends: 873 [2021-12-21 14:51:43,403 INFO L226 Difference]: Without dead ends: 591 [2021-12-21 14:51:43,404 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 [2021-12-21 14:51:43,405 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 669 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:43,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 2171 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:51:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-12-21 14:51:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 560. [2021-12-21 14:51:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 466 states have (on average 1.446351931330472) internal successors, (674), 474 states have internal predecessors, (674), 57 states have call successors, (57), 28 states have call predecessors, (57), 35 states have return successors, (72), 61 states have call predecessors, (72), 55 states have call successors, (72) [2021-12-21 14:51:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 803 transitions. [2021-12-21 14:51:43,429 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 803 transitions. Word has length 65 [2021-12-21 14:51:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 803 transitions. [2021-12-21 14:51:43,430 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) [2021-12-21 14:51:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 803 transitions. [2021-12-21 14:51:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:43,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:43,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:43,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:51:43,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -517305364, now seen corresponding path program 1 times [2021-12-21 14:51:43,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:43,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124822441] [2021-12-21 14:51:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:43,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:43,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124822441] [2021-12-21 14:51:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124822441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:43,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:43,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:51:43,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823890641] [2021-12-21 14:51:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:51:43,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:51:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:51:43,536 INFO L87 Difference]: Start difference. First operand 560 states and 803 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:51:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:45,074 INFO L93 Difference]: Finished difference Result 1916 states and 2644 transitions. [2021-12-21 14:51:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:51:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-21 14:51:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:45,082 INFO L225 Difference]: With dead ends: 1916 [2021-12-21 14:51:45,083 INFO L226 Difference]: Without dead ends: 1611 [2021-12-21 14:51:45,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 14:51:45,087 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 2741 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2760 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:45,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2760 Valid, 2297 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:51:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-21 14:51:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1476. [2021-12-21 14:51:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1193 states have (on average 1.363788767812238) internal successors, (1627), 1216 states have internal predecessors, (1627), 145 states have call successors, (145), 111 states have call predecessors, (145), 136 states have return successors, (189), 151 states have call predecessors, (189), 143 states have call successors, (189) [2021-12-21 14:51:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1961 transitions. [2021-12-21 14:51:45,155 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1961 transitions. Word has length 65 [2021-12-21 14:51:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:45,156 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 1961 transitions. [2021-12-21 14:51:45,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:51:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1961 transitions. [2021-12-21 14:51:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:45,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:45,157 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] [2021-12-21 14:51:45,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:51:45,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:45,158 INFO L85 PathProgramCache]: Analyzing trace with hash 462107460, now seen corresponding path program 1 times [2021-12-21 14:51:45,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:45,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488620735] [2021-12-21 14:51:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:45,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:45,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488620735] [2021-12-21 14:51:45,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488620735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:45,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:45,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:45,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765766806] [2021-12-21 14:51:45,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:45,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:45,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:45,257 INFO L87 Difference]: Start difference. First operand 1476 states and 1961 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) [2021-12-21 14:51:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:45,713 INFO L93 Difference]: Finished difference Result 3939 states and 5106 transitions. [2021-12-21 14:51:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:51:45,713 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 [2021-12-21 14:51:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:45,726 INFO L225 Difference]: With dead ends: 3939 [2021-12-21 14:51:45,726 INFO L226 Difference]: Without dead ends: 2725 [2021-12-21 14:51:45,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:51:45,733 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 1514 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:45,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 996 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:51:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-12-21 14:51:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2585. [2021-12-21 14:51:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2046 states have (on average 1.3064516129032258) internal successors, (2673), 2090 states have internal predecessors, (2673), 267 states have call successors, (267), 215 states have call predecessors, (267), 270 states have return successors, (393), 282 states have call predecessors, (393), 265 states have call successors, (393) [2021-12-21 14:51:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3333 transitions. [2021-12-21 14:51:45,845 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3333 transitions. Word has length 65 [2021-12-21 14:51:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:45,846 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 3333 transitions. [2021-12-21 14:51:45,846 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) [2021-12-21 14:51:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3333 transitions. [2021-12-21 14:51:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:51:45,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:45,847 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] [2021-12-21 14:51:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:51:45,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2123328339, now seen corresponding path program 1 times [2021-12-21 14:51:45,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:45,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779039179] [2021-12-21 14:51:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:45,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:45,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:45,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779039179] [2021-12-21 14:51:45,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779039179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:45,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:45,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:51:45,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704664851] [2021-12-21 14:51:45,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:45,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:51:45,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:51:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:51:45,919 INFO L87 Difference]: Start difference. First operand 2585 states and 3333 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) [2021-12-21 14:51:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:46,458 INFO L93 Difference]: Finished difference Result 5877 states and 7495 transitions. [2021-12-21 14:51:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:51:46,458 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 [2021-12-21 14:51:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:46,475 INFO L225 Difference]: With dead ends: 5877 [2021-12-21 14:51:46,475 INFO L226 Difference]: Without dead ends: 3554 [2021-12-21 14:51:46,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:51:46,481 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 874 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:46,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1244 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:51:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-12-21 14:51:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 3270. [2021-12-21 14:51:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 2578 states have (on average 1.2936384794414275) internal successors, (3335), 2628 states have internal predecessors, (3335), 341 states have call successors, (341), 279 states have call predecessors, (341), 349 states have return successors, (485), 365 states have call predecessors, (485), 339 states have call successors, (485) [2021-12-21 14:51:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 4161 transitions. [2021-12-21 14:51:46,667 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 4161 transitions. Word has length 66 [2021-12-21 14:51:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:46,668 INFO L470 AbstractCegarLoop]: Abstraction has 3270 states and 4161 transitions. [2021-12-21 14:51:46,668 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) [2021-12-21 14:51:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 4161 transitions. [2021-12-21 14:51:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 14:51:46,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:46,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:46,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:51:46,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 534392178, now seen corresponding path program 1 times [2021-12-21 14:51:46,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:46,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818670165] [2021-12-21 14:51:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:46,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:46,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818670165] [2021-12-21 14:51:46,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818670165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:46,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:46,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:51:46,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109126566] [2021-12-21 14:51:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:46,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:51:46,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:51:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:51:46,746 INFO L87 Difference]: Start difference. First operand 3270 states and 4161 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-12-21 14:51:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:47,218 INFO L93 Difference]: Finished difference Result 6825 states and 8577 transitions. [2021-12-21 14:51:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:51:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 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 72 [2021-12-21 14:51:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:47,234 INFO L225 Difference]: With dead ends: 6825 [2021-12-21 14:51:47,234 INFO L226 Difference]: Without dead ends: 3816 [2021-12-21 14:51:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:51:47,239 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 962 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 1303 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:51:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-12-21 14:51:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3553. [2021-12-21 14:51:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 2803 states have (on average 1.2854084909026045) internal successors, (3603), 2856 states have internal predecessors, (3603), 369 states have call successors, (369), 304 states have call predecessors, (369), 379 states have return successors, (519), 395 states have call predecessors, (519), 367 states have call successors, (519) [2021-12-21 14:51:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 4491 transitions. [2021-12-21 14:51:47,386 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 4491 transitions. Word has length 72 [2021-12-21 14:51:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:47,386 INFO L470 AbstractCegarLoop]: Abstraction has 3553 states and 4491 transitions. [2021-12-21 14:51:47,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-12-21 14:51:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 4491 transitions. [2021-12-21 14:51:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 14:51:47,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:47,388 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] [2021-12-21 14:51:47,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:51:47,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1130274590, now seen corresponding path program 1 times [2021-12-21 14:51:47,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:47,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151166273] [2021-12-21 14:51:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:47,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:47,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151166273] [2021-12-21 14:51:47,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151166273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:47,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:47,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:47,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773816726] [2021-12-21 14:51:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:47,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:47,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:47,476 INFO L87 Difference]: Start difference. First operand 3553 states and 4491 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) [2021-12-21 14:51:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:48,005 INFO L93 Difference]: Finished difference Result 4617 states and 5769 transitions. [2021-12-21 14:51:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:51:48,006 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 [2021-12-21 14:51:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:48,026 INFO L225 Difference]: With dead ends: 4617 [2021-12-21 14:51:48,026 INFO L226 Difference]: Without dead ends: 4614 [2021-12-21 14:51:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:51:48,029 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 1712 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1722 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1722 Valid, 1034 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:51:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2021-12-21 14:51:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4290. [2021-12-21 14:51:48,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4290 states, 3365 states have (on average 1.2736998514115898) internal successors, (4286), 3425 states have internal predecessors, (4286), 450 states have call successors, (450), 374 states have call predecessors, (450), 473 states have return successors, (643), 493 states have call predecessors, (643), 449 states have call successors, (643) [2021-12-21 14:51:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 5379 transitions. [2021-12-21 14:51:48,245 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 5379 transitions. Word has length 73 [2021-12-21 14:51:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 4290 states and 5379 transitions. [2021-12-21 14:51:48,247 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) [2021-12-21 14:51:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 5379 transitions. [2021-12-21 14:51:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 14:51:48,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:48,249 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] [2021-12-21 14:51:48,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:51:48,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash -679840836, now seen corresponding path program 1 times [2021-12-21 14:51:48,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732584340] [2021-12-21 14:51:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:48,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:48,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:48,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732584340] [2021-12-21 14:51:48,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732584340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:51:48,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775934891] [2021-12-21 14:51:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:48,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:51:48,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:51:48,383 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) [2021-12-21 14:51:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:51:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:51:48,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:51:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:48,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:51:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775934891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:51:49,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:51:49,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-21 14:51:49,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578516547] [2021-12-21 14:51:49,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:51:49,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:51:49,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:51:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:51:49,164 INFO L87 Difference]: Start difference. First operand 4290 states and 5379 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) [2021-12-21 14:51:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:50,611 INFO L93 Difference]: Finished difference Result 8661 states and 10712 transitions. [2021-12-21 14:51:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 14:51:50,611 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 [2021-12-21 14:51:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:50,654 INFO L225 Difference]: With dead ends: 8661 [2021-12-21 14:51:50,654 INFO L226 Difference]: Without dead ends: 8658 [2021-12-21 14:51:50,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-21 14:51:50,660 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1774 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:50,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 1966 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:51:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8658 states. [2021-12-21 14:51:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8658 to 7749. [2021-12-21 14:51:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7749 states, 6070 states have (on average 1.2606260296540361) internal successors, (7652), 6181 states have internal predecessors, (7652), 810 states have call successors, (810), 689 states have call predecessors, (810), 867 states have return successors, (1169), 881 states have call predecessors, (1169), 809 states have call successors, (1169) [2021-12-21 14:51:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7749 states to 7749 states and 9631 transitions. [2021-12-21 14:51:51,091 INFO L78 Accepts]: Start accepts. Automaton has 7749 states and 9631 transitions. Word has length 74 [2021-12-21 14:51:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:51,091 INFO L470 AbstractCegarLoop]: Abstraction has 7749 states and 9631 transitions. [2021-12-21 14:51:51,092 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) [2021-12-21 14:51:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7749 states and 9631 transitions. [2021-12-21 14:51:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 14:51:51,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:51,094 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] [2021-12-21 14:51:51,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:51:51,315 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,SelfDestructingSolverStorable10 [2021-12-21 14:51:51,316 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash 669680098, now seen corresponding path program 2 times [2021-12-21 14:51:51,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109586049] [2021-12-21 14:51:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:51,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:51,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109586049] [2021-12-21 14:51:51,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109586049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:51,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:51,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:51:51,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435369476] [2021-12-21 14:51:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:51,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:51:51,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:51:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:51:51,373 INFO L87 Difference]: Start difference. First operand 7749 states and 9631 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) [2021-12-21 14:51:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:51,848 INFO L93 Difference]: Finished difference Result 10746 states and 13347 transitions. [2021-12-21 14:51:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:51:51,849 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 [2021-12-21 14:51:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:51,864 INFO L225 Difference]: With dead ends: 10746 [2021-12-21 14:51:51,864 INFO L226 Difference]: Without dead ends: 4128 [2021-12-21 14:51:51,876 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 [2021-12-21 14:51:51,877 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 1132 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:51,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1115 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:51:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-12-21 14:51:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3094. [2021-12-21 14:51:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2449 states have (on average 1.2580645161290323) internal successors, (3081), 2482 states have internal predecessors, (3081), 326 states have call successors, (326), 270 states have call predecessors, (326), 317 states have return successors, (427), 344 states have call predecessors, (427), 325 states have call successors, (427) [2021-12-21 14:51:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 3834 transitions. [2021-12-21 14:51:52,097 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 3834 transitions. Word has length 77 [2021-12-21 14:51:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:52,097 INFO L470 AbstractCegarLoop]: Abstraction has 3094 states and 3834 transitions. [2021-12-21 14:51:52,098 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) [2021-12-21 14:51:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 3834 transitions. [2021-12-21 14:51:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 14:51:52,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:52,101 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] [2021-12-21 14:51:52,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:51:52,102 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1857100594, now seen corresponding path program 1 times [2021-12-21 14:51:52,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482149369] [2021-12-21 14:51:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:52,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:51:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:51:52,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:52,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482149369] [2021-12-21 14:51:52,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482149369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:52,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:52,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:51:52,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261344837] [2021-12-21 14:51:52,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:52,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:51:52,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:51:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:51:52,187 INFO L87 Difference]: Start difference. First operand 3094 states and 3834 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) [2021-12-21 14:51:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:53,330 INFO L93 Difference]: Finished difference Result 8804 states and 10780 transitions. [2021-12-21 14:51:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 14:51:53,330 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 [2021-12-21 14:51:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:53,349 INFO L225 Difference]: With dead ends: 8804 [2021-12-21 14:51:53,350 INFO L226 Difference]: Without dead ends: 5972 [2021-12-21 14:51:53,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-21 14:51:53,355 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 914 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:53,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 2097 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:51:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2021-12-21 14:51:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 5663. [2021-12-21 14:51:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 4383 states have (on average 1.2233629933835273) internal successors, (5362), 4503 states have internal predecessors, (5362), 623 states have call successors, (623), 524 states have call predecessors, (623), 655 states have return successors, (932), 640 states have call predecessors, (932), 622 states have call successors, (932) [2021-12-21 14:51:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 6917 transitions. [2021-12-21 14:51:53,627 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 6917 transitions. Word has length 84 [2021-12-21 14:51:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:53,627 INFO L470 AbstractCegarLoop]: Abstraction has 5663 states and 6917 transitions. [2021-12-21 14:51:53,627 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) [2021-12-21 14:51:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 6917 transitions. [2021-12-21 14:51:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:51:53,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:53,631 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] [2021-12-21 14:51:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:51:53,631 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 887628672, now seen corresponding path program 1 times [2021-12-21 14:51:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123256354] [2021-12-21 14:51:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:51:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 14:51:53,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:53,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123256354] [2021-12-21 14:51:53,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123256354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:53,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:53,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:51:53,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418909273] [2021-12-21 14:51:53,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:51:53,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:51:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:53,704 INFO L87 Difference]: Start difference. First operand 5663 states and 6917 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) [2021-12-21 14:51:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:54,892 INFO L93 Difference]: Finished difference Result 8690 states and 10600 transitions. [2021-12-21 14:51:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 14:51:54,893 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 [2021-12-21 14:51:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:54,907 INFO L225 Difference]: With dead ends: 8690 [2021-12-21 14:51:54,907 INFO L226 Difference]: Without dead ends: 4152 [2021-12-21 14:51:54,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-21 14:51:54,916 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1553 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:54,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1841 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:51:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-12-21 14:51:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3775. [2021-12-21 14:51:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 2925 states have (on average 1.2126495726495727) internal successors, (3547), 3007 states have internal predecessors, (3547), 411 states have call successors, (411), 339 states have call predecessors, (411), 437 states have return successors, (581), 433 states have call predecessors, (581), 410 states have call successors, (581) [2021-12-21 14:51:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4539 transitions. [2021-12-21 14:51:55,145 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4539 transitions. Word has length 93 [2021-12-21 14:51:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:55,145 INFO L470 AbstractCegarLoop]: Abstraction has 3775 states and 4539 transitions. [2021-12-21 14:51:55,145 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) [2021-12-21 14:51:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4539 transitions. [2021-12-21 14:51:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:51:55,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:55,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:55,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:51:55,150 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 521017431, now seen corresponding path program 1 times [2021-12-21 14:51:55,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:55,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185539931] [2021-12-21 14:51:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:55,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:51:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:51:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:51:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:55,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185539931] [2021-12-21 14:51:55,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185539931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:55,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:55,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:51:55,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080993867] [2021-12-21 14:51:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:51:55,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:55,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:51:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:51:55,242 INFO L87 Difference]: Start difference. First operand 3775 states and 4539 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:56,347 INFO L93 Difference]: Finished difference Result 4105 states and 5065 transitions. [2021-12-21 14:51:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-21 14:51:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:56,362 INFO L225 Difference]: With dead ends: 4105 [2021-12-21 14:51:56,362 INFO L226 Difference]: Without dead ends: 3862 [2021-12-21 14:51:56,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:56,366 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 754 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:56,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1009 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:51:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-12-21 14:51:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3775. [2021-12-21 14:51:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 2925 states have (on average 1.2123076923076923) internal successors, (3546), 3007 states have internal predecessors, (3546), 411 states have call successors, (411), 339 states have call predecessors, (411), 437 states have return successors, (581), 433 states have call predecessors, (581), 410 states have call successors, (581) [2021-12-21 14:51:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4538 transitions. [2021-12-21 14:51:56,678 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4538 transitions. Word has length 123 [2021-12-21 14:51:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:56,678 INFO L470 AbstractCegarLoop]: Abstraction has 3775 states and 4538 transitions. [2021-12-21 14:51:56,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4538 transitions. [2021-12-21 14:51:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:51:56,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:56,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:56,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:51:56,685 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash 49661081, now seen corresponding path program 1 times [2021-12-21 14:51:56,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:56,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498999754] [2021-12-21 14:51:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:56,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:51:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:51:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:51:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:56,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:56,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498999754] [2021-12-21 14:51:56,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498999754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:56,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:56,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:51:56,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688175354] [2021-12-21 14:51:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:56,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:51:56,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:51:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:51:56,781 INFO L87 Difference]: Start difference. First operand 3775 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-12-21 14:51:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:58,519 INFO L93 Difference]: Finished difference Result 4431 states and 5585 transitions. [2021-12-21 14:51:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:51:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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 123 [2021-12-21 14:51:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:58,529 INFO L225 Difference]: With dead ends: 4431 [2021-12-21 14:51:58,529 INFO L226 Difference]: Without dead ends: 4194 [2021-12-21 14:51:58,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:51:58,531 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1194 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 1410 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:51:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-12-21 14:51:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 4021. [2021-12-21 14:51:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 3148 states have (on average 1.2379288437102922) internal successors, (3897), 3231 states have internal predecessors, (3897), 427 states have call successors, (427), 345 states have call predecessors, (427), 444 states have return successors, (600), 449 states have call predecessors, (600), 426 states have call successors, (600) [2021-12-21 14:51:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 4924 transitions. [2021-12-21 14:51:58,796 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 4924 transitions. Word has length 123 [2021-12-21 14:51:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:58,797 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 4924 transitions. [2021-12-21 14:51:58,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-12-21 14:51:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 4924 transitions. [2021-12-21 14:51:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:51:58,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:58,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:58,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:51:58,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -675902947, now seen corresponding path program 1 times [2021-12-21 14:51:58,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294487983] [2021-12-21 14:51:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:58,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:51:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:51:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:51:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:58,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294487983] [2021-12-21 14:51:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294487983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:58,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:58,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:58,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268011045] [2021-12-21 14:51:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:58,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:58,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:58,907 INFO L87 Difference]: Start difference. First operand 4021 states and 4924 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:00,922 INFO L93 Difference]: Finished difference Result 5019 states and 6514 transitions. [2021-12-21 14:52:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:00,936 INFO L225 Difference]: With dead ends: 5019 [2021-12-21 14:52:00,936 INFO L226 Difference]: Without dead ends: 4536 [2021-12-21 14:52:00,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:00,942 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 1203 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:00,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 2262 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-12-21 14:52:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4250. [2021-12-21 14:52:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 3354 states have (on average 1.2564102564102564) internal successors, (4214), 3438 states have internal predecessors, (4214), 443 states have call successors, (443), 351 states have call predecessors, (443), 451 states have return successors, (618), 466 states have call predecessors, (618), 442 states have call successors, (618) [2021-12-21 14:52:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 5275 transitions. [2021-12-21 14:52:01,258 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 5275 transitions. Word has length 123 [2021-12-21 14:52:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:01,259 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 5275 transitions. [2021-12-21 14:52:01,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 5275 transitions. [2021-12-21 14:52:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:01,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:01,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:01,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:52:01,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash 713391067, now seen corresponding path program 1 times [2021-12-21 14:52:01,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:01,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646564252] [2021-12-21 14:52:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:01,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:01,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646564252] [2021-12-21 14:52:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646564252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:01,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:01,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538245499] [2021-12-21 14:52:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:01,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:01,355 INFO L87 Difference]: Start difference. First operand 4250 states and 5275 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:03,369 INFO L93 Difference]: Finished difference Result 5885 states and 7873 transitions. [2021-12-21 14:52:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:03,383 INFO L225 Difference]: With dead ends: 5885 [2021-12-21 14:52:03,384 INFO L226 Difference]: Without dead ends: 5173 [2021-12-21 14:52:03,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:03,388 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1200 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:03,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 2250 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2021-12-21 14:52:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 4709. [2021-12-21 14:52:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3767 states have (on average 1.2872312184762411) internal successors, (4849), 3853 states have internal predecessors, (4849), 475 states have call successors, (475), 363 states have call predecessors, (475), 465 states have return successors, (658), 500 states have call predecessors, (658), 474 states have call successors, (658) [2021-12-21 14:52:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 5982 transitions. [2021-12-21 14:52:03,708 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 5982 transitions. Word has length 123 [2021-12-21 14:52:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:03,708 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 5982 transitions. [2021-12-21 14:52:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 5982 transitions. [2021-12-21 14:52:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:03,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:03,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:03,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:52:03,714 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1320002979, now seen corresponding path program 1 times [2021-12-21 14:52:03,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331833447] [2021-12-21 14:52:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:03,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:03,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331833447] [2021-12-21 14:52:03,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331833447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:03,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:03,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:03,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911260267] [2021-12-21 14:52:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:03,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:03,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:03,803 INFO L87 Difference]: Start difference. First operand 4709 states and 5982 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:05,984 INFO L93 Difference]: Finished difference Result 7552 states and 10476 transitions. [2021-12-21 14:52:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:06,003 INFO L225 Difference]: With dead ends: 7552 [2021-12-21 14:52:06,003 INFO L226 Difference]: Without dead ends: 6381 [2021-12-21 14:52:06,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:06,010 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1199 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:06,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2244 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6381 states. [2021-12-21 14:52:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6381 to 5628. [2021-12-21 14:52:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 4594 states have (on average 1.3319547235524598) internal successors, (6119), 4684 states have internal predecessors, (6119), 539 states have call successors, (539), 387 states have call predecessors, (539), 493 states have return successors, (744), 568 states have call predecessors, (744), 538 states have call successors, (744) [2021-12-21 14:52:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 7402 transitions. [2021-12-21 14:52:06,402 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 7402 transitions. Word has length 123 [2021-12-21 14:52:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:06,402 INFO L470 AbstractCegarLoop]: Abstraction has 5628 states and 7402 transitions. [2021-12-21 14:52:06,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 7402 transitions. [2021-12-21 14:52:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:06,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:06,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:52:06,408 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1108255643, now seen corresponding path program 1 times [2021-12-21 14:52:06,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:06,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174143236] [2021-12-21 14:52:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:06,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:06,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174143236] [2021-12-21 14:52:06,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174143236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:06,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:06,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:06,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799521684] [2021-12-21 14:52:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:06,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:06,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:06,519 INFO L87 Difference]: Start difference. First operand 5628 states and 7402 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:08,772 INFO L93 Difference]: Finished difference Result 10878 states and 15686 transitions. [2021-12-21 14:52:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:08,800 INFO L225 Difference]: With dead ends: 10878 [2021-12-21 14:52:08,801 INFO L226 Difference]: Without dead ends: 8788 [2021-12-21 14:52:08,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:08,813 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 1194 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:08,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 2236 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-12-21 14:52:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7480. [2021-12-21 14:52:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 6262 states have (on average 1.3866176940274673) internal successors, (8683), 6360 states have internal predecessors, (8683), 667 states have call successors, (667), 435 states have call predecessors, (667), 549 states have return successors, (934), 704 states have call predecessors, (934), 666 states have call successors, (934) [2021-12-21 14:52:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 10284 transitions. [2021-12-21 14:52:09,296 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 10284 transitions. Word has length 123 [2021-12-21 14:52:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:09,296 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 10284 transitions. [2021-12-21 14:52:09,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 10284 transitions. [2021-12-21 14:52:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:09,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:09,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:09,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:52:09,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1289214887, now seen corresponding path program 1 times [2021-12-21 14:52:09,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861901463] [2021-12-21 14:52:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:09,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:09,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861901463] [2021-12-21 14:52:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861901463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:09,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:09,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:09,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670769] [2021-12-21 14:52:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:09,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:09,390 INFO L87 Difference]: Start difference. First operand 7480 states and 10284 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:10,908 INFO L93 Difference]: Finished difference Result 12778 states and 18729 transitions. [2021-12-21 14:52:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:10,937 INFO L225 Difference]: With dead ends: 12778 [2021-12-21 14:52:10,938 INFO L226 Difference]: Without dead ends: 8836 [2021-12-21 14:52:10,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:10,952 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 928 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:10,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 1336 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:52:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-12-21 14:52:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7480. [2021-12-21 14:52:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 6262 states have (on average 1.3839029064196742) internal successors, (8666), 6360 states have internal predecessors, (8666), 667 states have call successors, (667), 435 states have call predecessors, (667), 549 states have return successors, (934), 704 states have call predecessors, (934), 666 states have call successors, (934) [2021-12-21 14:52:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 10267 transitions. [2021-12-21 14:52:11,473 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 10267 transitions. Word has length 123 [2021-12-21 14:52:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:11,474 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 10267 transitions. [2021-12-21 14:52:11,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 10267 transitions. [2021-12-21 14:52:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:11,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:11,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:11,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:52:11,481 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash -258173989, now seen corresponding path program 1 times [2021-12-21 14:52:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:11,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130431474] [2021-12-21 14:52:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:11,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:11,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:11,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130431474] [2021-12-21 14:52:11,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130431474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:11,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:11,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:11,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247525086] [2021-12-21 14:52:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:11,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:11,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:11,587 INFO L87 Difference]: Start difference. First operand 7480 states and 10267 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:13,902 INFO L93 Difference]: Finished difference Result 17530 states and 26078 transitions. [2021-12-21 14:52:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:13,956 INFO L225 Difference]: With dead ends: 17530 [2021-12-21 14:52:13,957 INFO L226 Difference]: Without dead ends: 13588 [2021-12-21 14:52:13,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:13,974 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1186 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:13,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 2225 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:52:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2021-12-21 14:52:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 11214. [2021-12-21 14:52:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 9628 states have (on average 1.4347735770668884) internal successors, (13814), 9742 states have internal predecessors, (13814), 923 states have call successors, (923), 531 states have call predecessors, (923), 661 states have return successors, (1368), 976 states have call predecessors, (1368), 922 states have call successors, (1368) [2021-12-21 14:52:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 16105 transitions. [2021-12-21 14:52:14,677 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 16105 transitions. Word has length 123 [2021-12-21 14:52:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:14,678 INFO L470 AbstractCegarLoop]: Abstraction has 11214 states and 16105 transitions. [2021-12-21 14:52:14,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 16105 transitions. [2021-12-21 14:52:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:14,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:14,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:14,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:52:14,687 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2130390041, now seen corresponding path program 1 times [2021-12-21 14:52:14,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:14,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655551558] [2021-12-21 14:52:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:14,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:14,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655551558] [2021-12-21 14:52:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655551558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:14,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:14,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:14,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433068143] [2021-12-21 14:52:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:14,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:14,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:14,768 INFO L87 Difference]: Start difference. First operand 11214 states and 16105 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:16,324 INFO L93 Difference]: Finished difference Result 21362 states and 32316 transitions. [2021-12-21 14:52:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:16,368 INFO L225 Difference]: With dead ends: 21362 [2021-12-21 14:52:16,369 INFO L226 Difference]: Without dead ends: 13686 [2021-12-21 14:52:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:16,390 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 1082 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 1145 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13686 states. [2021-12-21 14:52:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13686 to 11214. [2021-12-21 14:52:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 9628 states have (on average 1.4313460739509762) internal successors, (13781), 9742 states have internal predecessors, (13781), 923 states have call successors, (923), 531 states have call predecessors, (923), 661 states have return successors, (1368), 976 states have call predecessors, (1368), 922 states have call successors, (1368) [2021-12-21 14:52:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 16072 transitions. [2021-12-21 14:52:17,123 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 16072 transitions. Word has length 123 [2021-12-21 14:52:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:17,123 INFO L470 AbstractCegarLoop]: Abstraction has 11214 states and 16072 transitions. [2021-12-21 14:52:17,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 16072 transitions. [2021-12-21 14:52:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:17,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:17,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:17,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:52:17,131 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -563506149, now seen corresponding path program 1 times [2021-12-21 14:52:17,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904259638] [2021-12-21 14:52:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:17,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904259638] [2021-12-21 14:52:17,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904259638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:17,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:17,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:17,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744459805] [2021-12-21 14:52:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:17,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:17,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:17,222 INFO L87 Difference]: Start difference. First operand 11214 states and 16072 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:20,574 INFO L93 Difference]: Finished difference Result 33876 states and 51608 transitions. [2021-12-21 14:52:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:52:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:20,653 INFO L225 Difference]: With dead ends: 33876 [2021-12-21 14:52:20,653 INFO L226 Difference]: Without dead ends: 26200 [2021-12-21 14:52:20,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:20,680 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1429 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:20,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 2200 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:52:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26200 states. [2021-12-21 14:52:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26200 to 18488. [2021-12-21 14:52:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18488 states, 16198 states have (on average 1.4693789356710705) internal successors, (23801), 16344 states have internal predecessors, (23801), 1403 states have call successors, (1403), 723 states have call predecessors, (1403), 885 states have return successors, (2366), 1488 states have call predecessors, (2366), 1402 states have call successors, (2366) [2021-12-21 14:52:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18488 states to 18488 states and 27570 transitions. [2021-12-21 14:52:22,174 INFO L78 Accepts]: Start accepts. Automaton has 18488 states and 27570 transitions. Word has length 123 [2021-12-21 14:52:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:22,174 INFO L470 AbstractCegarLoop]: Abstraction has 18488 states and 27570 transitions. [2021-12-21 14:52:22,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 18488 states and 27570 transitions. [2021-12-21 14:52:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 14:52:22,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:22,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:22,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:52:22,185 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1620237351, now seen corresponding path program 1 times [2021-12-21 14:52:22,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:22,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819439926] [2021-12-21 14:52:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:22,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 14:52:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:52:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 14:52:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:22,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:22,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819439926] [2021-12-21 14:52:22,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819439926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:22,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:22,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:22,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916208615] [2021-12-21 14:52:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:22,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:22,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:22,294 INFO L87 Difference]: Start difference. First operand 18488 states and 27570 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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) [2021-12-21 14:52:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:27,668 INFO L93 Difference]: Finished difference Result 61996 states and 96400 transitions. [2021-12-21 14:52:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:52:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 123 [2021-12-21 14:52:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:27,832 INFO L225 Difference]: With dead ends: 61996 [2021-12-21 14:52:27,832 INFO L226 Difference]: Without dead ends: 47046