./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.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 dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:18:53,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:18:53,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:18:53,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:18:53,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:18:53,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:18:53,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:18:53,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:18:53,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:18:53,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:18:53,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:18:53,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:18:53,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:18:53,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:18:53,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:18:53,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:18:53,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:18:53,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:18:53,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:18:53,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:18:53,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:18:53,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:18:53,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:18:53,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:18:53,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:18:53,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:18:53,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:18:53,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:18:53,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:18:53,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:18:53,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:18:53,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:18:53,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:18:53,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:18:53,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:18:53,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:18:53,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:18:53,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:18:53,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:18:53,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:18:53,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:18:53,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:18:53,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:18:53,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:18:53,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:18:53,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:18:53,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:18:53,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:18:53,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:18:53,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:18:53,721 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:18:53,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:18:53,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:18:53,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:18:53,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:18:53,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:18:53,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:18:53,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:18:53,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:18:53,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:18:53,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:18:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:53,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:18:53,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:18:53,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:18:53,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:18:53,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:18:53,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:18:53,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:18:53,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:18:53,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:18:53,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb [2021-12-14 16:18:53,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:18:53,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:18:53,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:18:53,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:18:53,939 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:18:53,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2021-12-14 16:18:53,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00716595a/a0923a21262d4e48806a4b885a384e7c/FLAG5095ef5c2 [2021-12-14 16:18:54,379 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:18:54,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2021-12-14 16:18:54,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00716595a/a0923a21262d4e48806a4b885a384e7c/FLAG5095ef5c2 [2021-12-14 16:18:54,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00716595a/a0923a21262d4e48806a4b885a384e7c [2021-12-14 16:18:54,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:18:54,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:18:54,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:54,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:18:54,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:18:54,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2c5a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54, skipping insertion in model container [2021-12-14 16:18:54,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:18:54,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:18:54,578 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.10.cil-2.c[914,927] [2021-12-14 16:18:54,615 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.10.cil-2.c[7115,7128] [2021-12-14 16:18:54,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:54,687 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:18:54,694 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.10.cil-2.c[914,927] [2021-12-14 16:18:54,713 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.10.cil-2.c[7115,7128] [2021-12-14 16:18:54,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:54,777 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:18:54,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54 WrapperNode [2021-12-14 16:18:54,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:54,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:54,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:18:54,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:18:54,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,841 INFO L137 Inliner]: procedures = 73, calls = 87, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 924 [2021-12-14 16:18:54,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:54,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:18:54,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:18:54,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:18:54,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:18:54,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:18:54,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:18:54,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:18:54,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (1/1) ... [2021-12-14 16:18:54,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:54,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:18:54,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:18:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:18:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:18:54,965 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:18:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:18:54,965 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:18:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:18:54,965 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:18:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:18:54,965 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:18:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:18:54,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:18:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:18:54,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:18:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:18:54,966 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:18:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:18:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:18:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:18:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:18:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:18:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:18:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:18:54,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:18:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:18:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:18:54,979 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:18:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:18:54,979 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:18:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:18:54,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:18:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:18:54,980 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:18:55,094 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:18:55,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:18:55,656 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:18:55,669 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:18:55,670 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-14 16:18:55,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:55 BoogieIcfgContainer [2021-12-14 16:18:55,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:18:55,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:18:55,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:18:55,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:18:55,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:18:54" (1/3) ... [2021-12-14 16:18:55,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752bd00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:55, skipping insertion in model container [2021-12-14 16:18:55,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:54" (2/3) ... [2021-12-14 16:18:55,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752bd00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:55, skipping insertion in model container [2021-12-14 16:18:55,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:55" (3/3) ... [2021-12-14 16:18:55,695 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2021-12-14 16:18:55,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:18:55,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:18:55,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:18:55,740 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:18:55,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:18:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 433 states, 378 states have (on average 1.6322751322751323) internal successors, (617), 384 states have internal predecessors, (617), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-14 16:18:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:55,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:55,763 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] [2021-12-14 16:18:55,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1844920847, now seen corresponding path program 1 times [2021-12-14 16:18:55,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:55,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143809316] [2021-12-14 16:18:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:55,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:56,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:56,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143809316] [2021-12-14 16:18:56,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143809316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:56,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:56,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:56,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425618997] [2021-12-14 16:18:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:56,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:56,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:56,101 INFO L87 Difference]: Start difference. First operand has 433 states, 378 states have (on average 1.6322751322751323) internal successors, (617), 384 states have internal predecessors, (617), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) 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) [2021-12-14 16:18:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:56,954 INFO L93 Difference]: Finished difference Result 975 states and 1548 transitions. [2021-12-14 16:18:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:56,956 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 [2021-12-14 16:18:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:56,972 INFO L225 Difference]: With dead ends: 975 [2021-12-14 16:18:56,972 INFO L226 Difference]: Without dead ends: 558 [2021-12-14 16:18:56,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:56,980 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1392 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1397 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:56,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1397 Valid, 1930 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-14 16:18:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 519. [2021-12-14 16:18:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 446 states have (on average 1.515695067264574) internal successors, (676), 452 states have internal predecessors, (676), 49 states have call successors, (49), 21 states have call predecessors, (49), 22 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-14 16:18:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 777 transitions. [2021-12-14 16:18:57,068 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 777 transitions. Word has length 65 [2021-12-14 16:18:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 777 transitions. [2021-12-14 16:18:57,069 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) [2021-12-14 16:18:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 777 transitions. [2021-12-14 16:18:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:57,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:57,072 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] [2021-12-14 16:18:57,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:18:57,073 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -166032207, now seen corresponding path program 1 times [2021-12-14 16:18:57,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761082478] [2021-12-14 16:18:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:57,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:57,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761082478] [2021-12-14 16:18:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761082478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:57,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:57,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:57,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802847312] [2021-12-14 16:18:57,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:57,204 INFO L87 Difference]: Start difference. First operand 519 states and 777 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) [2021-12-14 16:18:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:58,020 INFO L93 Difference]: Finished difference Result 866 states and 1254 transitions. [2021-12-14 16:18:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:58,021 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 [2021-12-14 16:18:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:58,024 INFO L225 Difference]: With dead ends: 866 [2021-12-14 16:18:58,024 INFO L226 Difference]: Without dead ends: 689 [2021-12-14 16:18:58,025 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 [2021-12-14 16:18:58,026 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1556 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:58,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 2142 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:18:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-12-14 16:18:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 615. [2021-12-14 16:18:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 522 states have (on average 1.4942528735632183) internal successors, (780), 530 states have internal predecessors, (780), 60 states have call successors, (60), 28 states have call predecessors, (60), 31 states have return successors, (71), 60 states have call predecessors, (71), 58 states have call successors, (71) [2021-12-14 16:18:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 911 transitions. [2021-12-14 16:18:58,091 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 911 transitions. Word has length 65 [2021-12-14 16:18:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:58,092 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 911 transitions. [2021-12-14 16:18:58,092 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) [2021-12-14 16:18:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 911 transitions. [2021-12-14 16:18:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:58,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:58,095 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] [2021-12-14 16:18:58,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:18:58,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2100348979, now seen corresponding path program 1 times [2021-12-14 16:18:58,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768040483] [2021-12-14 16:18:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:58,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:58,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:58,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768040483] [2021-12-14 16:18:58,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768040483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:58,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:58,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:58,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997322272] [2021-12-14 16:18:58,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:58,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:58,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:58,220 INFO L87 Difference]: Start difference. First operand 615 states and 911 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) [2021-12-14 16:18:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:58,985 INFO L93 Difference]: Finished difference Result 916 states and 1325 transitions. [2021-12-14 16:18:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:58,986 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 [2021-12-14 16:18:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:58,989 INFO L225 Difference]: With dead ends: 916 [2021-12-14 16:18:58,989 INFO L226 Difference]: Without dead ends: 649 [2021-12-14 16:18:58,990 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 [2021-12-14 16:18:58,991 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 570 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2970 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:58,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 2970 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-14 16:18:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 620. [2021-12-14 16:18:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 526 states have (on average 1.4866920152091254) internal successors, (782), 534 states have internal predecessors, (782), 60 states have call successors, (60), 28 states have call predecessors, (60), 32 states have return successors, (72), 61 states have call predecessors, (72), 58 states have call successors, (72) [2021-12-14 16:18:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 914 transitions. [2021-12-14 16:18:59,012 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 914 transitions. Word has length 65 [2021-12-14 16:18:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:59,012 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 914 transitions. [2021-12-14 16:18:59,012 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) [2021-12-14 16:18:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 914 transitions. [2021-12-14 16:18:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:59,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:59,014 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] [2021-12-14 16:18:59,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:18:59,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1070989681, now seen corresponding path program 1 times [2021-12-14 16:18:59,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438447065] [2021-12-14 16:18:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:59,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:59,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:59,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438447065] [2021-12-14 16:18:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438447065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:59,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:59,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:59,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465786440] [2021-12-14 16:18:59,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:59,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:59,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:59,141 INFO L87 Difference]: Start difference. First operand 620 states and 914 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) [2021-12-14 16:18:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:59,912 INFO L93 Difference]: Finished difference Result 938 states and 1347 transitions. [2021-12-14 16:18:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:59,913 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 [2021-12-14 16:18:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:59,916 INFO L225 Difference]: With dead ends: 938 [2021-12-14 16:18:59,916 INFO L226 Difference]: Without dead ends: 666 [2021-12-14 16:18:59,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:59,917 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 849 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:59,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 2666 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-14 16:18:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 635. [2021-12-14 16:18:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 538 states have (on average 1.4758364312267658) internal successors, (794), 546 states have internal predecessors, (794), 60 states have call successors, (60), 28 states have call predecessors, (60), 35 states have return successors, (75), 64 states have call predecessors, (75), 58 states have call successors, (75) [2021-12-14 16:18:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 929 transitions. [2021-12-14 16:18:59,949 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 929 transitions. Word has length 65 [2021-12-14 16:18:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:59,949 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 929 transitions. [2021-12-14 16:18:59,950 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) [2021-12-14 16:18:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 929 transitions. [2021-12-14 16:18:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:59,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:59,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:59,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:18:59,951 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1837774221, now seen corresponding path program 1 times [2021-12-14 16:18:59,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:59,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376453608] [2021-12-14 16:18:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:59,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:00,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376453608] [2021-12-14 16:19:00,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376453608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:00,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:00,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:19:00,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600744748] [2021-12-14 16:19:00,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:00,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:19:00,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:19:00,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:19:00,046 INFO L87 Difference]: Start difference. First operand 635 states and 929 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) [2021-12-14 16:19:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:00,839 INFO L93 Difference]: Finished difference Result 1027 states and 1440 transitions. [2021-12-14 16:19:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:19:00,842 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 [2021-12-14 16:19:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:00,845 INFO L225 Difference]: With dead ends: 1027 [2021-12-14 16:19:00,845 INFO L226 Difference]: Without dead ends: 742 [2021-12-14 16:19:00,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:19:00,847 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1580 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:00,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 1939 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:19:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-14 16:19:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 647. [2021-12-14 16:19:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 548 states have (on average 1.467153284671533) internal successors, (804), 556 states have internal predecessors, (804), 61 states have call successors, (61), 29 states have call predecessors, (61), 36 states have return successors, (74), 65 states have call predecessors, (74), 59 states have call successors, (74) [2021-12-14 16:19:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 939 transitions. [2021-12-14 16:19:00,875 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 939 transitions. Word has length 65 [2021-12-14 16:19:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 939 transitions. [2021-12-14 16:19:00,876 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) [2021-12-14 16:19:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 939 transitions. [2021-12-14 16:19:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:19:00,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:00,878 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] [2021-12-14 16:19:00,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:19:00,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1971787727, now seen corresponding path program 1 times [2021-12-14 16:19:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806892814] [2021-12-14 16:19:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:00,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:00,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806892814] [2021-12-14 16:19:00,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806892814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:00,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:00,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:00,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076867055] [2021-12-14 16:19:00,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:00,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:00,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:00,969 INFO L87 Difference]: Start difference. First operand 647 states and 939 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) [2021-12-14 16:19:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:01,295 INFO L93 Difference]: Finished difference Result 1289 states and 1786 transitions. [2021-12-14 16:19:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:19:01,296 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 [2021-12-14 16:19:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:01,300 INFO L225 Difference]: With dead ends: 1289 [2021-12-14 16:19:01,300 INFO L226 Difference]: Without dead ends: 993 [2021-12-14 16:19:01,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:19:01,303 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1557 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:01,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 1527 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:19:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-12-14 16:19:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 937. [2021-12-14 16:19:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 772 states have (on average 1.4132124352331605) internal successors, (1091), 787 states have internal predecessors, (1091), 96 states have call successors, (96), 51 states have call predecessors, (96), 67 states have return successors, (131), 105 states have call predecessors, (131), 94 states have call successors, (131) [2021-12-14 16:19:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1318 transitions. [2021-12-14 16:19:01,334 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1318 transitions. Word has length 65 [2021-12-14 16:19:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:01,335 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1318 transitions. [2021-12-14 16:19:01,335 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) [2021-12-14 16:19:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1318 transitions. [2021-12-14 16:19:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:19:01,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:01,337 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] [2021-12-14 16:19:01,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:19:01,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash -313198551, now seen corresponding path program 1 times [2021-12-14 16:19:01,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:01,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585293897] [2021-12-14 16:19:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:01,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:01,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585293897] [2021-12-14 16:19:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585293897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:01,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:01,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397567646] [2021-12-14 16:19:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:01,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:01,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:01,390 INFO L87 Difference]: Start difference. First operand 937 states and 1318 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) [2021-12-14 16:19:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:01,879 INFO L93 Difference]: Finished difference Result 2140 states and 2889 transitions. [2021-12-14 16:19:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:19:01,880 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 [2021-12-14 16:19:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:01,885 INFO L225 Difference]: With dead ends: 2140 [2021-12-14 16:19:01,885 INFO L226 Difference]: Without dead ends: 1533 [2021-12-14 16:19:01,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:01,887 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 750 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:01,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1825 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 16:19:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-12-14 16:19:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1418. [2021-12-14 16:19:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1151 states have (on average 1.3657688966116421) internal successors, (1572), 1169 states have internal predecessors, (1572), 141 states have call successors, (141), 95 states have call predecessors, (141), 124 states have return successors, (203), 160 states have call predecessors, (203), 139 states have call successors, (203) [2021-12-14 16:19:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1916 transitions. [2021-12-14 16:19:01,938 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1916 transitions. Word has length 66 [2021-12-14 16:19:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:01,938 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 1916 transitions. [2021-12-14 16:19:01,938 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) [2021-12-14 16:19:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1916 transitions. [2021-12-14 16:19:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:19:01,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:01,940 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] [2021-12-14 16:19:01,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:19:01,940 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1145041108, now seen corresponding path program 1 times [2021-12-14 16:19:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:01,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242709304] [2021-12-14 16:19:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:01,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:01,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242709304] [2021-12-14 16:19:01,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242709304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:01,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:01,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:01,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152391328] [2021-12-14 16:19:01,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:01,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:01,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:01,993 INFO L87 Difference]: Start difference. First operand 1418 states and 1916 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) [2021-12-14 16:19:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:02,296 INFO L93 Difference]: Finished difference Result 3606 states and 4722 transitions. [2021-12-14 16:19:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:19:02,297 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 [2021-12-14 16:19:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:02,304 INFO L225 Difference]: With dead ends: 3606 [2021-12-14 16:19:02,305 INFO L226 Difference]: Without dead ends: 2538 [2021-12-14 16:19:02,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:19:02,307 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 1558 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:02,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1261 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:19:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-12-14 16:19:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2280. [2021-12-14 16:19:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 1817 states have (on average 1.3203082003302147) internal successors, (2399), 1845 states have internal predecessors, (2399), 239 states have call successors, (239), 179 states have call predecessors, (239), 222 states have return successors, (339), 262 states have call predecessors, (339), 237 states have call successors, (339) [2021-12-14 16:19:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 2977 transitions. [2021-12-14 16:19:02,369 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 2977 transitions. Word has length 66 [2021-12-14 16:19:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:02,370 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 2977 transitions. [2021-12-14 16:19:02,370 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) [2021-12-14 16:19:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 2977 transitions. [2021-12-14 16:19:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 16:19:02,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:02,371 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] [2021-12-14 16:19:02,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:19:02,372 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1831794968, now seen corresponding path program 1 times [2021-12-14 16:19:02,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024787368] [2021-12-14 16:19:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:02,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:02,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024787368] [2021-12-14 16:19:02,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024787368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:02,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:02,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946615742] [2021-12-14 16:19:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:02,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:02,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:02,423 INFO L87 Difference]: Start difference. First operand 2280 states and 2977 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) [2021-12-14 16:19:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:02,731 INFO L93 Difference]: Finished difference Result 5190 states and 6627 transitions. [2021-12-14 16:19:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:19:02,732 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 [2021-12-14 16:19:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:02,745 INFO L225 Difference]: With dead ends: 5190 [2021-12-14 16:19:02,745 INFO L226 Difference]: Without dead ends: 3260 [2021-12-14 16:19:02,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:02,751 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1539 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:02,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1297 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:19:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-12-14 16:19:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3012. [2021-12-14 16:19:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 2385 states have (on average 1.3010482180293501) internal successors, (3103), 2421 states have internal predecessors, (3103), 319 states have call successors, (319), 249 states have call predecessors, (319), 306 states have return successors, (448), 348 states have call predecessors, (448), 317 states have call successors, (448) [2021-12-14 16:19:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 3870 transitions. [2021-12-14 16:19:02,870 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 3870 transitions. Word has length 72 [2021-12-14 16:19:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:02,871 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 3870 transitions. [2021-12-14 16:19:02,871 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) [2021-12-14 16:19:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 3870 transitions. [2021-12-14 16:19:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 16:19:02,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:02,872 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] [2021-12-14 16:19:02,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:19:02,872 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1467852209, now seen corresponding path program 1 times [2021-12-14 16:19:02,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487543807] [2021-12-14 16:19:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:02,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:02,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487543807] [2021-12-14 16:19:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487543807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:02,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:02,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:02,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622192284] [2021-12-14 16:19:02,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:02,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:02,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:02,923 INFO L87 Difference]: Start difference. First operand 3012 states and 3870 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) [2021-12-14 16:19:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:03,310 INFO L93 Difference]: Finished difference Result 3786 states and 4801 transitions. [2021-12-14 16:19:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:19:03,311 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 [2021-12-14 16:19:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:03,322 INFO L225 Difference]: With dead ends: 3786 [2021-12-14 16:19:03,322 INFO L226 Difference]: Without dead ends: 3783 [2021-12-14 16:19:03,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:19:03,324 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 1855 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:03,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1865 Valid, 1564 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:19:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-12-14 16:19:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3506. [2021-12-14 16:19:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 2770 states have (on average 1.2906137184115523) internal successors, (3575), 2811 states have internal predecessors, (3575), 369 states have call successors, (369), 293 states have call predecessors, (369), 365 states have return successors, (527), 408 states have call predecessors, (527), 368 states have call successors, (527) [2021-12-14 16:19:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 4471 transitions. [2021-12-14 16:19:03,430 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 4471 transitions. Word has length 73 [2021-12-14 16:19:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:03,430 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 4471 transitions. [2021-12-14 16:19:03,430 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) [2021-12-14 16:19:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 4471 transitions. [2021-12-14 16:19:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 16:19:03,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:03,432 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] [2021-12-14 16:19:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:19:03,432 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1739934738, now seen corresponding path program 1 times [2021-12-14 16:19:03,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028101939] [2021-12-14 16:19:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:03,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:03,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028101939] [2021-12-14 16:19:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028101939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:19:03,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174602427] [2021-12-14 16:19:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:03,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:19:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:19:03,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:19:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:19:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:19:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:19:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:19:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174602427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:19:04,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:19:04,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-14 16:19:04,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109815664] [2021-12-14 16:19:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:19:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:19:04,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:19:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:19:04,259 INFO L87 Difference]: Start difference. First operand 3506 states and 4471 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) [2021-12-14 16:19:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:05,625 INFO L93 Difference]: Finished difference Result 7947 states and 9957 transitions. [2021-12-14 16:19:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 16:19:05,625 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 [2021-12-14 16:19:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:05,650 INFO L225 Difference]: With dead ends: 7947 [2021-12-14 16:19:05,651 INFO L226 Difference]: Without dead ends: 7944 [2021-12-14 16:19:05,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-14 16:19:05,654 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 2633 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2703 Valid, 2571 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:19:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2021-12-14 16:19:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 5296. [2021-12-14 16:19:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 4174 states have (on average 1.281983708672736) internal successors, (5351), 4237 states have internal predecessors, (5351), 553 states have call successors, (553), 451 states have call predecessors, (553), 567 states have return successors, (805), 614 states have call predecessors, (805), 552 states have call successors, (805) [2021-12-14 16:19:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 6709 transitions. [2021-12-14 16:19:05,897 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 6709 transitions. Word has length 74 [2021-12-14 16:19:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:05,897 INFO L470 AbstractCegarLoop]: Abstraction has 5296 states and 6709 transitions. [2021-12-14 16:19:05,897 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) [2021-12-14 16:19:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 6709 transitions. [2021-12-14 16:19:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:19:05,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:05,899 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] [2021-12-14 16:19:05,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:19:06,111 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 [2021-12-14 16:19:06,111 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1254124943, now seen corresponding path program 2 times [2021-12-14 16:19:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769429733] [2021-12-14 16:19:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:06,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:06,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769429733] [2021-12-14 16:19:06,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769429733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:06,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:06,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:06,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104524146] [2021-12-14 16:19:06,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:06,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:06,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:06,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:06,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:06,165 INFO L87 Difference]: Start difference. First operand 5296 states and 6709 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) [2021-12-14 16:19:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:06,546 INFO L93 Difference]: Finished difference Result 7978 states and 10082 transitions. [2021-12-14 16:19:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:19:06,547 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 [2021-12-14 16:19:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:06,606 INFO L225 Difference]: With dead ends: 7978 [2021-12-14 16:19:06,607 INFO L226 Difference]: Without dead ends: 3903 [2021-12-14 16:19:06,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:19:06,613 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 1146 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:06,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 1706 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:19:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-12-14 16:19:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3668. [2021-12-14 16:19:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 2902 states have (on average 1.271881461061337) internal successors, (3691), 2943 states have internal predecessors, (3691), 385 states have call successors, (385), 307 states have call predecessors, (385), 379 states have return successors, (531), 424 states have call predecessors, (531), 384 states have call successors, (531) [2021-12-14 16:19:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 4607 transitions. [2021-12-14 16:19:06,727 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 4607 transitions. Word has length 77 [2021-12-14 16:19:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:06,727 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 4607 transitions. [2021-12-14 16:19:06,728 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) [2021-12-14 16:19:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 4607 transitions. [2021-12-14 16:19:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 16:19:06,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:06,730 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] [2021-12-14 16:19:06,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:19:06,730 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1075548900, now seen corresponding path program 1 times [2021-12-14 16:19:06,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816038698] [2021-12-14 16:19:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:06,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:19:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:19:06,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816038698] [2021-12-14 16:19:06,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816038698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:06,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:06,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:19:06,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563654301] [2021-12-14 16:19:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:06,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:19:06,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:06,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:19:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:19:06,790 INFO L87 Difference]: Start difference. First operand 3668 states and 4607 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) [2021-12-14 16:19:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:07,806 INFO L93 Difference]: Finished difference Result 10540 states and 13024 transitions. [2021-12-14 16:19:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:19:07,807 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 [2021-12-14 16:19:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:07,822 INFO L225 Difference]: With dead ends: 10540 [2021-12-14 16:19:07,823 INFO L226 Difference]: Without dead ends: 5903 [2021-12-14 16:19:07,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:19:07,832 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1637 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:07,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 1972 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:19:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2021-12-14 16:19:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 5583. [2021-12-14 16:19:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 4360 states have (on average 1.241743119266055) internal successors, (5414), 4444 states have internal predecessors, (5414), 589 states have call successors, (589), 481 states have call predecessors, (589), 632 states have return successors, (913), 664 states have call predecessors, (913), 588 states have call successors, (913) [2021-12-14 16:19:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 6916 transitions. [2021-12-14 16:19:08,050 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 6916 transitions. Word has length 84 [2021-12-14 16:19:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:08,051 INFO L470 AbstractCegarLoop]: Abstraction has 5583 states and 6916 transitions. [2021-12-14 16:19:08,051 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) [2021-12-14 16:19:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 6916 transitions. [2021-12-14 16:19:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:19:08,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:08,056 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] [2021-12-14 16:19:08,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:19:08,056 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1873261453, now seen corresponding path program 1 times [2021-12-14 16:19:08,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:08,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557372566] [2021-12-14 16:19:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:08,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 16:19:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:19:08,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:08,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557372566] [2021-12-14 16:19:08,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557372566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:08,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:08,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:19:08,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061531684] [2021-12-14 16:19:08,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:08,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:19:08,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:19:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:19:08,134 INFO L87 Difference]: Start difference. First operand 5583 states and 6916 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) [2021-12-14 16:19:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:09,219 INFO L93 Difference]: Finished difference Result 9586 states and 11756 transitions. [2021-12-14 16:19:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:19:09,220 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 [2021-12-14 16:19:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:09,232 INFO L225 Difference]: With dead ends: 9586 [2021-12-14 16:19:09,232 INFO L226 Difference]: Without dead ends: 4993 [2021-12-14 16:19:09,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-14 16:19:09,241 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1830 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:09,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1874 Valid, 2297 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:19:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-12-14 16:19:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4659. [2021-12-14 16:19:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 3649 states have (on average 1.2367771992326664) internal successors, (4513), 3715 states have internal predecessors, (4513), 490 states have call successors, (490), 396 states have call predecessors, (490), 518 states have return successors, (691), 554 states have call predecessors, (691), 489 states have call successors, (691) [2021-12-14 16:19:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 5694 transitions. [2021-12-14 16:19:09,377 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 5694 transitions. Word has length 93 [2021-12-14 16:19:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:09,377 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 5694 transitions. [2021-12-14 16:19:09,377 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) [2021-12-14 16:19:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 5694 transitions. [2021-12-14 16:19:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:19:09,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:09,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:19:09,383 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1950710036, now seen corresponding path program 1 times [2021-12-14 16:19:09,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:09,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442387742] [2021-12-14 16:19:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:09,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:19:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 16:19:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-14 16:19:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:19:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:19:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 16:19:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-14 16:19:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-14 16:19:09,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442387742] [2021-12-14 16:19:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442387742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:19:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831512772] [2021-12-14 16:19:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:09,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:19:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:19:09,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:19:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:19:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 16:19:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:19:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:19:09,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:19:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831512772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:09,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:19:09,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-14 16:19:09,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194836317] [2021-12-14 16:19:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:09,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:09,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:19:09,752 INFO L87 Difference]: Start difference. First operand 4659 states and 5694 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:19:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:09,836 INFO L93 Difference]: Finished difference Result 6825 states and 8317 transitions. [2021-12-14 16:19:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-14 16:19:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:09,842 INFO L225 Difference]: With dead ends: 6825 [2021-12-14 16:19:09,842 INFO L226 Difference]: Without dead ends: 2520 [2021-12-14 16:19:09,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:19:09,848 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 34 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:09,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3173 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:19:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-12-14 16:19:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2395. [2021-12-14 16:19:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 1962 states have (on average 1.2533129459734964) internal successors, (2459), 1977 states have internal predecessors, (2459), 214 states have call successors, (214), 162 states have call predecessors, (214), 217 states have return successors, (298), 256 states have call predecessors, (298), 213 states have call successors, (298) [2021-12-14 16:19:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 2971 transitions. [2021-12-14 16:19:09,919 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 2971 transitions. Word has length 145 [2021-12-14 16:19:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 2395 states and 2971 transitions. [2021-12-14 16:19:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:19:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 2971 transitions. [2021-12-14 16:19:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-14 16:19:09,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:09,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:09,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:19:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 16:19:10,135 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2099513894, now seen corresponding path program 1 times [2021-12-14 16:19:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104575829] [2021-12-14 16:19:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:10,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:19:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 16:19:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 16:19:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 16:19:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 16:19:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 16:19:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 16:19:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-14 16:19:10,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104575829] [2021-12-14 16:19:10,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104575829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:10,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:10,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:10,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659069631] [2021-12-14 16:19:10,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:10,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:10,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:10,200 INFO L87 Difference]: Start difference. First operand 2395 states and 2971 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 16:19:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:10,623 INFO L93 Difference]: Finished difference Result 2460 states and 3039 transitions. [2021-12-14 16:19:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-14 16:19:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:10,629 INFO L225 Difference]: With dead ends: 2460 [2021-12-14 16:19:10,629 INFO L226 Difference]: Without dead ends: 2017 [2021-12-14 16:19:10,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:19:10,632 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 945 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:10,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 1469 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:19:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-12-14 16:19:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1955. [2021-12-14 16:19:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1618 states have (on average 1.2700865265760197) internal successors, (2055), 1630 states have internal predecessors, (2055), 168 states have call successors, (168), 122 states have call predecessors, (168), 167 states have return successors, (234), 203 states have call predecessors, (234), 167 states have call successors, (234) [2021-12-14 16:19:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2457 transitions. [2021-12-14 16:19:10,702 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2457 transitions. Word has length 147 [2021-12-14 16:19:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:10,702 INFO L470 AbstractCegarLoop]: Abstraction has 1955 states and 2457 transitions. [2021-12-14 16:19:10,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 16:19:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2457 transitions. [2021-12-14 16:19:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 16:19:10,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:10,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:10,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:19:10,706 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash 38806, now seen corresponding path program 1 times [2021-12-14 16:19:10,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392219044] [2021-12-14 16:19:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:19:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:19:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 16:19:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 16:19:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 16:19:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 16:19:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-14 16:19:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 16:19:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392219044] [2021-12-14 16:19:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392219044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:10,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:10,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:10,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430212318] [2021-12-14 16:19:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:10,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:10,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:10,785 INFO L87 Difference]: Start difference. First operand 1955 states and 2457 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 16:19:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:11,344 INFO L93 Difference]: Finished difference Result 3432 states and 4256 transitions. [2021-12-14 16:19:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:19:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-14 16:19:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:11,349 INFO L225 Difference]: With dead ends: 3432 [2021-12-14 16:19:11,349 INFO L226 Difference]: Without dead ends: 2056 [2021-12-14 16:19:11,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:11,351 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 599 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:11,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2247 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:19:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-12-14 16:19:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1864. [2021-12-14 16:19:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1549 states have (on average 1.2717882504841833) internal successors, (1970), 1562 states have internal predecessors, (1970), 159 states have call successors, (159), 117 states have call predecessors, (159), 154 states have return successors, (218), 185 states have call predecessors, (218), 158 states have call successors, (218) [2021-12-14 16:19:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2347 transitions. [2021-12-14 16:19:11,400 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2347 transitions. Word has length 159 [2021-12-14 16:19:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:11,400 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 2347 transitions. [2021-12-14 16:19:11,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-14 16:19:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2347 transitions. [2021-12-14 16:19:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 16:19:11,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:11,403 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:11,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:19:11,403 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2014192118, now seen corresponding path program 1 times [2021-12-14 16:19:11,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:11,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885823121] [2021-12-14 16:19:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:11,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:19:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:19:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:19:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:19:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:19:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:19:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 16:19:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 16:19:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:19:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:19:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 16:19:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 16:19:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 16:19:11,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885823121] [2021-12-14 16:19:11,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885823121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:19:11,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511009604] [2021-12-14 16:19:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:11,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:19:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:19:11,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:19:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:19:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 16:19:11,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:19:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-14 16:19:11,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:19:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-14 16:19:12,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511009604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:19:12,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:19:12,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-14 16:19:12,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508455848] [2021-12-14 16:19:12,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:19:12,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 16:19:12,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 16:19:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:19:12,272 INFO L87 Difference]: Start difference. First operand 1864 states and 2347 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-14 16:19:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:13,487 INFO L93 Difference]: Finished difference Result 3836 states and 4800 transitions. [2021-12-14 16:19:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 16:19:13,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-14 16:19:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:13,493 INFO L225 Difference]: With dead ends: 3836 [2021-12-14 16:19:13,493 INFO L226 Difference]: Without dead ends: 2404 [2021-12-14 16:19:13,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-14 16:19:13,498 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 2301 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2332 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:13,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2332 Valid, 2887 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:19:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-12-14 16:19:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2254. [2021-12-14 16:19:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1827 states have (on average 1.2441160372194855) internal successors, (2273), 1848 states have internal predecessors, (2273), 213 states have call successors, (213), 167 states have call predecessors, (213), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2021-12-14 16:19:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2818 transitions. [2021-12-14 16:19:13,567 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2818 transitions. Word has length 162 [2021-12-14 16:19:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:13,568 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 2818 transitions. [2021-12-14 16:19:13,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-14 16:19:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2818 transitions. [2021-12-14 16:19:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:13,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:13,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:13,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:19:13,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 16:19:13,791 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1411211214, now seen corresponding path program 1 times [2021-12-14 16:19:13,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095155113] [2021-12-14 16:19:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:13,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:13,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095155113] [2021-12-14 16:19:13,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095155113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:13,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:19:13,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851184603] [2021-12-14 16:19:13,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:19:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:19:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:19:13,882 INFO L87 Difference]: Start difference. First operand 2254 states and 2818 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:19:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:14,943 INFO L93 Difference]: Finished difference Result 2691 states and 3522 transitions. [2021-12-14 16:19:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:14,950 INFO L225 Difference]: With dead ends: 2691 [2021-12-14 16:19:14,950 INFO L226 Difference]: Without dead ends: 2374 [2021-12-14 16:19:14,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:19:14,952 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 978 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:14,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1224 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:19:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-12-14 16:19:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2254. [2021-12-14 16:19:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1827 states have (on average 1.2435686918445539) internal successors, (2272), 1848 states have internal predecessors, (2272), 213 states have call successors, (213), 167 states have call predecessors, (213), 212 states have return successors, (332), 239 states have call predecessors, (332), 212 states have call successors, (332) [2021-12-14 16:19:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2817 transitions. [2021-12-14 16:19:15,065 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2817 transitions. Word has length 156 [2021-12-14 16:19:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:15,066 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 2817 transitions. [2021-12-14 16:19:15,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-14 16:19:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2817 transitions. [2021-12-14 16:19:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:15,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:15,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:15,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:19:15,069 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1749498764, now seen corresponding path program 1 times [2021-12-14 16:19:15,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:15,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188949331] [2021-12-14 16:19:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:15,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:15,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188949331] [2021-12-14 16:19:15,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188949331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:15,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:15,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:19:15,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488813027] [2021-12-14 16:19:15,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:15,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:19:15,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:19:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:19:15,154 INFO L87 Difference]: Start difference. First operand 2254 states and 2817 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:16,995 INFO L93 Difference]: Finished difference Result 3126 states and 4224 transitions. [2021-12-14 16:19:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:19:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:17,003 INFO L225 Difference]: With dead ends: 3126 [2021-12-14 16:19:17,003 INFO L226 Difference]: Without dead ends: 2817 [2021-12-14 16:19:17,005 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 [2021-12-14 16:19:17,005 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1538 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:17,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 1754 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:19:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-12-14 16:19:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2578. [2021-12-14 16:19:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2125 states have (on average 1.2922352941176471) internal successors, (2746), 2147 states have internal predecessors, (2746), 232 states have call successors, (232), 173 states have call predecessors, (232), 219 states have return successors, (354), 258 states have call predecessors, (354), 231 states have call successors, (354) [2021-12-14 16:19:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3332 transitions. [2021-12-14 16:19:17,121 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3332 transitions. Word has length 156 [2021-12-14 16:19:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 3332 transitions. [2021-12-14 16:19:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3332 transitions. [2021-12-14 16:19:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:17,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:17,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:17,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:19:17,125 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 73101560, now seen corresponding path program 1 times [2021-12-14 16:19:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:17,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789567927] [2021-12-14 16:19:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:17,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:17,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789567927] [2021-12-14 16:19:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789567927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:17,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833996253] [2021-12-14 16:19:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:17,210 INFO L87 Difference]: Start difference. First operand 2578 states and 3332 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:19,601 INFO L93 Difference]: Finished difference Result 3909 states and 5480 transitions. [2021-12-14 16:19:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:19,608 INFO L225 Difference]: With dead ends: 3909 [2021-12-14 16:19:19,608 INFO L226 Difference]: Without dead ends: 3276 [2021-12-14 16:19:19,609 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 [2021-12-14 16:19:19,610 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1560 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 2864 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:19,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 2864 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:19:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-12-14 16:19:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2879. [2021-12-14 16:19:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2400 states have (on average 1.3225) internal successors, (3174), 2423 states have internal predecessors, (3174), 251 states have call successors, (251), 179 states have call predecessors, (251), 226 states have return successors, (375), 278 states have call predecessors, (375), 250 states have call successors, (375) [2021-12-14 16:19:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 3800 transitions. [2021-12-14 16:19:19,747 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 3800 transitions. Word has length 156 [2021-12-14 16:19:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 2879 states and 3800 transitions. [2021-12-14 16:19:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 3800 transitions. [2021-12-14 16:19:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:19,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:19,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:19:19,751 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1544338890, now seen corresponding path program 1 times [2021-12-14 16:19:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997085086] [2021-12-14 16:19:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:19,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:19,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997085086] [2021-12-14 16:19:19,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997085086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:19,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:19,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:19,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296723942] [2021-12-14 16:19:19,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:19,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:19,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:19,841 INFO L87 Difference]: Start difference. First operand 2879 states and 3800 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:22,133 INFO L93 Difference]: Finished difference Result 5063 states and 7316 transitions. [2021-12-14 16:19:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:22,144 INFO L225 Difference]: With dead ends: 5063 [2021-12-14 16:19:22,144 INFO L226 Difference]: Without dead ends: 4129 [2021-12-14 16:19:22,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:22,148 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 1653 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:22,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 2092 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 16:19:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-12-14 16:19:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 3482. [2021-12-14 16:19:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 2951 states have (on average 1.3659776347001016) internal successors, (4031), 2976 states have internal predecessors, (4031), 289 states have call successors, (289), 191 states have call predecessors, (289), 240 states have return successors, (421), 318 states have call predecessors, (421), 288 states have call successors, (421) [2021-12-14 16:19:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 4741 transitions. [2021-12-14 16:19:22,330 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 4741 transitions. Word has length 156 [2021-12-14 16:19:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:22,331 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 4741 transitions. [2021-12-14 16:19:22,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 4741 transitions. [2021-12-14 16:19:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:22,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:22,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:22,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:19:22,335 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1180872392, now seen corresponding path program 1 times [2021-12-14 16:19:22,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:22,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442446267] [2021-12-14 16:19:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:22,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:22,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:22,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442446267] [2021-12-14 16:19:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442446267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:22,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233683076] [2021-12-14 16:19:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:22,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:22,419 INFO L87 Difference]: Start difference. First operand 3482 states and 4741 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:24,883 INFO L93 Difference]: Finished difference Result 7282 states and 10825 transitions. [2021-12-14 16:19:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:24,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:24,898 INFO L225 Difference]: With dead ends: 7282 [2021-12-14 16:19:24,899 INFO L226 Difference]: Without dead ends: 5745 [2021-12-14 16:19:24,904 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 [2021-12-14 16:19:24,904 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 1552 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:24,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 2850 Invalid, 2910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:19:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-12-14 16:19:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4689. [2021-12-14 16:19:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 4054 states have (on average 1.4171188949185989) internal successors, (5745), 4083 states have internal predecessors, (5745), 365 states have call successors, (365), 215 states have call predecessors, (365), 268 states have return successors, (519), 398 states have call predecessors, (519), 364 states have call successors, (519) [2021-12-14 16:19:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 6629 transitions. [2021-12-14 16:19:25,186 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 6629 transitions. Word has length 156 [2021-12-14 16:19:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:25,186 INFO L470 AbstractCegarLoop]: Abstraction has 4689 states and 6629 transitions. [2021-12-14 16:19:25,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 6629 transitions. [2021-12-14 16:19:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:25,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:25,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:25,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:19:25,195 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:25,195 INFO L85 PathProgramCache]: Analyzing trace with hash -892053002, now seen corresponding path program 1 times [2021-12-14 16:19:25,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301386257] [2021-12-14 16:19:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:25,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:25,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301386257] [2021-12-14 16:19:25,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301386257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:25,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:25,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:25,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269062888] [2021-12-14 16:19:25,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:25,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:25,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:25,287 INFO L87 Difference]: Start difference. First operand 4689 states and 6629 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:27,943 INFO L93 Difference]: Finished difference Result 11719 states and 17859 transitions. [2021-12-14 16:19:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:27,971 INFO L225 Difference]: With dead ends: 11719 [2021-12-14 16:19:27,971 INFO L226 Difference]: Without dead ends: 8975 [2021-12-14 16:19:27,981 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 [2021-12-14 16:19:27,982 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 1548 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:27,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 2846 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 16:19:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-12-14 16:19:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 7108. [2021-12-14 16:19:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7108 states, 6265 states have (on average 1.46512370311253) internal successors, (9179), 6302 states have internal predecessors, (9179), 517 states have call successors, (517), 263 states have call predecessors, (517), 324 states have return successors, (733), 558 states have call predecessors, (733), 516 states have call successors, (733) [2021-12-14 16:19:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 10429 transitions. [2021-12-14 16:19:28,338 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 10429 transitions. Word has length 156 [2021-12-14 16:19:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:28,338 INFO L470 AbstractCegarLoop]: Abstraction has 7108 states and 10429 transitions. [2021-12-14 16:19:28,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 10429 transitions. [2021-12-14 16:19:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:28,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:28,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:28,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:19:28,344 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1436925576, now seen corresponding path program 1 times [2021-12-14 16:19:28,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852832071] [2021-12-14 16:19:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:28,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:28,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852832071] [2021-12-14 16:19:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852832071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:28,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:28,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:28,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187396340] [2021-12-14 16:19:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:28,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:28,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:28,439 INFO L87 Difference]: Start difference. First operand 7108 states and 10429 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:31,313 INFO L93 Difference]: Finished difference Result 20592 states and 31985 transitions. [2021-12-14 16:19:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:31,352 INFO L225 Difference]: With dead ends: 20592 [2021-12-14 16:19:31,352 INFO L226 Difference]: Without dead ends: 15429 [2021-12-14 16:19:31,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:31,407 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 1547 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2840 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:31,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 2840 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 16:19:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15429 states. [2021-12-14 16:19:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15429 to 11959. [2021-12-14 16:19:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11959 states, 10700 states have (on average 1.5014018691588784) internal successors, (16065), 10753 states have internal predecessors, (16065), 821 states have call successors, (821), 359 states have call predecessors, (821), 436 states have return successors, (1215), 878 states have call predecessors, (1215), 820 states have call successors, (1215) [2021-12-14 16:19:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11959 states to 11959 states and 18101 transitions. [2021-12-14 16:19:31,966 INFO L78 Accepts]: Start accepts. Automaton has 11959 states and 18101 transitions. Word has length 156 [2021-12-14 16:19:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:31,966 INFO L470 AbstractCegarLoop]: Abstraction has 11959 states and 18101 transitions. [2021-12-14 16:19:31,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11959 states and 18101 transitions. [2021-12-14 16:19:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:31,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:31,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:31,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:19:31,973 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash -761765450, now seen corresponding path program 1 times [2021-12-14 16:19:31,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:31,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471440289] [2021-12-14 16:19:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:31,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:32,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:32,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:32,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471440289] [2021-12-14 16:19:32,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471440289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:32,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:32,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794362683] [2021-12-14 16:19:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:32,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:32,069 INFO L87 Difference]: Start difference. First operand 11959 states and 18101 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:35,596 INFO L93 Difference]: Finished difference Result 38306 states and 60367 transitions. [2021-12-14 16:19:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:35,669 INFO L225 Difference]: With dead ends: 38306 [2021-12-14 16:19:35,669 INFO L226 Difference]: Without dead ends: 28292 [2021-12-14 16:19:35,692 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 [2021-12-14 16:19:35,692 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 1542 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:35,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 2832 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 16:19:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28292 states. [2021-12-14 16:19:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28292 to 21723. [2021-12-14 16:19:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21723 states, 19632 states have (on average 1.5253158109209455) internal successors, (29945), 19717 states have internal predecessors, (29945), 1429 states have call successors, (1429), 551 states have call predecessors, (1429), 660 states have return successors, (2341), 1518 states have call predecessors, (2341), 1428 states have call successors, (2341) [2021-12-14 16:19:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21723 states to 21723 states and 33715 transitions. [2021-12-14 16:19:36,797 INFO L78 Accepts]: Start accepts. Automaton has 21723 states and 33715 transitions. Word has length 156 [2021-12-14 16:19:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 21723 states and 33715 transitions. [2021-12-14 16:19:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21723 states and 33715 transitions. [2021-12-14 16:19:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:36,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:36,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:36,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:19:36,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1346537100, now seen corresponding path program 1 times [2021-12-14 16:19:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:36,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428907078] [2021-12-14 16:19:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:36,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428907078] [2021-12-14 16:19:36,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428907078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:36,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:36,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:36,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773632448] [2021-12-14 16:19:36,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:36,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:36,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:36,906 INFO L87 Difference]: Start difference. First operand 21723 states and 33715 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:41,936 INFO L93 Difference]: Finished difference Result 73800 states and 117859 transitions. [2021-12-14 16:19:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:19:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:42,113 INFO L225 Difference]: With dead ends: 73800 [2021-12-14 16:19:42,113 INFO L226 Difference]: Without dead ends: 54022 [2021-12-14 16:19:42,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:19:42,168 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 1541 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:42,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 2827 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:19:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54022 states. [2021-12-14 16:19:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54022 to 41312. [2021-12-14 16:19:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41312 states, 37557 states have (on average 1.5388609313842958) internal successors, (57795), 37706 states have internal predecessors, (57795), 2645 states have call successors, (2645), 935 states have call predecessors, (2645), 1108 states have return successors, (5079), 2798 states have call predecessors, (5079), 2644 states have call successors, (5079) [2021-12-14 16:19:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41312 states to 41312 states and 65519 transitions. [2021-12-14 16:19:44,573 INFO L78 Accepts]: Start accepts. Automaton has 41312 states and 65519 transitions. Word has length 156 [2021-12-14 16:19:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:19:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 41312 states and 65519 transitions. [2021-12-14 16:19:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 41312 states and 65519 transitions. [2021-12-14 16:19:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 16:19:44,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:19:44,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:19:44,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:19:44,592 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:19:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:19:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1781042698, now seen corresponding path program 1 times [2021-12-14 16:19:44,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:19:44,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452699939] [2021-12-14 16:19:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:19:44,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:19:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:19:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 16:19:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:19:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:19:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 16:19:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:19:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:19:44,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:19:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452699939] [2021-12-14 16:19:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452699939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:19:44,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:19:44,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:19:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164609644] [2021-12-14 16:19:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:19:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:19:44,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:19:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:19:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:19:44,702 INFO L87 Difference]: Start difference. First operand 41312 states and 65519 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:19:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:19:49,062 INFO L93 Difference]: Finished difference Result 94180 states and 153248 transitions. [2021-12-14 16:19:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:19:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 156 [2021-12-14 16:19:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:19:49,244 INFO L225 Difference]: With dead ends: 94180 [2021-12-14 16:19:49,245 INFO L226 Difference]: Without dead ends: 54813 [2021-12-14 16:19:49,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:19:49,322 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1176 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:19:49,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1658 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:19:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54813 states.