./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:01:20,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:01:20,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:01:20,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:01:20,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:01:20,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:01:20,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:01:20,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:01:20,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:01:20,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:01:20,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:01:20,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:01:20,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:01:20,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:01:20,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:01:20,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:01:20,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:01:20,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:01:20,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:01:20,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:01:20,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:01:20,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:01:20,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:01:20,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:01:20,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:01:20,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:01:20,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:01:20,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:01:20,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:01:20,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:01:20,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:01:20,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:01:20,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:01:20,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:01:20,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:01:20,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:01:20,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:01:20,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:01:20,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:01:20,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:01:20,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:01:20,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:01:20,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:01:20,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:01:20,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:01:20,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:01:20,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:01:20,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:01:20,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:01:20,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:01:20,801 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:01:20,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:01:20,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:01:20,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:01:20,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:01:20,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:01:20,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:01:20,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:01:20,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:01:20,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:01:20,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:01:20,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:01:20,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:01:20,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:01:20,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:01:20,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:01:20,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:01:20,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:01:20,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:01:20,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:01:20,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:01:20,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:01:20,806 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:01:20,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:01:20,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:01:20,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:01:20,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 [2021-12-16 02:01:21,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:01:21,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:01:21,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:01:21,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:01:21,038 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:01:21,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2021-12-16 02:01:21,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb48da9b8/23f9cfacc1aa4e1a9da2275a21e2c58f/FLAG80e2ccafb [2021-12-16 02:01:21,882 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:01:21,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2021-12-16 02:01:21,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb48da9b8/23f9cfacc1aa4e1a9da2275a21e2c58f/FLAG80e2ccafb [2021-12-16 02:01:22,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb48da9b8/23f9cfacc1aa4e1a9da2275a21e2c58f [2021-12-16 02:01:22,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:01:22,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:01:22,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:01:22,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:01:22,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:01:22,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:01:22" (1/1) ... [2021-12-16 02:01:22,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59684f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:22, skipping insertion in model container [2021-12-16 02:01:22,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:01:22" (1/1) ... [2021-12-16 02:01:22,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:01:22,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:01:23,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[377612,377625] [2021-12-16 02:01:23,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[383339,383352] [2021-12-16 02:01:23,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:01:23,729 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:01:24,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[377612,377625] [2021-12-16 02:01:24,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c[383339,383352] [2021-12-16 02:01:24,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:01:24,403 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:01:24,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24 WrapperNode [2021-12-16 02:01:24,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:01:24,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:01:24,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:01:24,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:01:24,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:24,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:24,733 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-16 02:01:24,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:01:24,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:01:24,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:01:24,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:01:24,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:24,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:24,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:24,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:25,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:25,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:25,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:25,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:01:25,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:01:25,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:01:25,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:01:25,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (1/1) ... [2021-12-16 02:01:25,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:01:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:25,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:01:25,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:01:25,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:01:25,367 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 02:01:25,367 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 02:01:25,367 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 02:01:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 02:01:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 02:01:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 02:01:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 02:01:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 02:01:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 02:01:25,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 02:01:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:01:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 02:01:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 02:01:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:01:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:01:25,501 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:01:25,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:01:30,264 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:01:30,292 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:01:30,293 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-16 02:01:30,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:01:30 BoogieIcfgContainer [2021-12-16 02:01:30,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:01:30,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:01:30,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:01:30,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:01:30,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:01:22" (1/3) ... [2021-12-16 02:01:30,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b0b2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:01:30, skipping insertion in model container [2021-12-16 02:01:30,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:01:24" (2/3) ... [2021-12-16 02:01:30,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b0b2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:01:30, skipping insertion in model container [2021-12-16 02:01:30,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:01:30" (3/3) ... [2021-12-16 02:01:30,307 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.02.cil-1.c [2021-12-16 02:01:30,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:01:30,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:01:30,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:01:30,406 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:01:30,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:01:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 02:01:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:30,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:30,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:30,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:30,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-16 02:01:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:30,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629127887] [2021-12-16 02:01:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:30,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:30,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:30,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629127887] [2021-12-16 02:01:30,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629127887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:30,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:30,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:01:30,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044719863] [2021-12-16 02:01:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:30,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:01:30,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:01:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:01:30,966 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:31,676 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-16 02:01:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:01:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:31,694 INFO L225 Difference]: With dead ends: 4802 [2021-12-16 02:01:31,694 INFO L226 Difference]: Without dead ends: 2427 [2021-12-16 02:01:31,700 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 [2021-12-16 02:01:31,702 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:31,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:01:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-16 02:01:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-16 02:01:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-16 02:01:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-16 02:01:31,782 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-16 02:01:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:31,783 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-16 02:01:31,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-16 02:01:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:31,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:31,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:31,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:01:31,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-16 02:01:31,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328942376] [2021-12-16 02:01:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:31,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:31,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328942376] [2021-12-16 02:01:31,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328942376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:31,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:31,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:01:31,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572065161] [2021-12-16 02:01:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:31,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:01:31,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:01:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:01:31,901 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:32,573 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-16 02:01:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:01:32,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:32,582 INFO L225 Difference]: With dead ends: 2807 [2021-12-16 02:01:32,582 INFO L226 Difference]: Without dead ends: 2574 [2021-12-16 02:01:32,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:01:32,585 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:32,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:01:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-16 02:01:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-16 02:01:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8188976377952757) internal successors, (4389), 2417 states have internal predecessors, (4389), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-16 02:01:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-16 02:01:32,626 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-16 02:01:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-16 02:01:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-16 02:01:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:32,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:32,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:32,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:01:32,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-16 02:01:32,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052323507] [2021-12-16 02:01:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:32,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:32,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052323507] [2021-12-16 02:01:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052323507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:32,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:32,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:01:32,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486212636] [2021-12-16 02:01:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:01:32,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:01:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:01:32,694 INFO L87 Difference]: Start difference. First operand 2473 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:33,409 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-16 02:01:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:01:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:33,421 INFO L225 Difference]: With dead ends: 3193 [2021-12-16 02:01:33,421 INFO L226 Difference]: Without dead ends: 2851 [2021-12-16 02:01:33,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:01:33,428 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 20448 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:33,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:01:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-16 02:01:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-16 02:01:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2596 states have (on average 1.7927580893682589) internal successors, (4654), 2602 states have internal predecessors, (4654), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-16 02:01:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-16 02:01:33,488 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-16 02:01:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:33,489 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-16 02:01:33,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-16 02:01:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:33,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:33,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:33,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:01:33,491 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-16 02:01:33,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:33,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925438052] [2021-12-16 02:01:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:33,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:33,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925438052] [2021-12-16 02:01:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925438052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:33,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:01:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393080424] [2021-12-16 02:01:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:33,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:01:33,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:01:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:01:33,556 INFO L87 Difference]: Start difference. First operand 2692 states and 4787 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:34,294 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-16 02:01:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:01:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:34,309 INFO L225 Difference]: With dead ends: 4037 [2021-12-16 02:01:34,309 INFO L226 Difference]: Without dead ends: 3476 [2021-12-16 02:01:34,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:01:34,313 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20704 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:34,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:01:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-16 02:01:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-16 02:01:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.7530612244897958) internal successors, (5154), 2950 states have internal predecessors, (5154), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-16 02:01:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-16 02:01:34,396 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-16 02:01:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:34,396 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-16 02:01:34,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-16 02:01:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:34,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:34,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:34,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:01:34,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-16 02:01:34,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384649098] [2021-12-16 02:01:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:34,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:34,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384649098] [2021-12-16 02:01:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384649098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:34,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:34,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:01:34,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181725733] [2021-12-16 02:01:34,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:34,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:01:34,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:01:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:01:34,460 INFO L87 Difference]: Start difference. First operand 3104 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:34,870 INFO L93 Difference]: Finished difference Result 4308 states and 7182 transitions. [2021-12-16 02:01:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:01:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:34,881 INFO L225 Difference]: With dead ends: 4308 [2021-12-16 02:01:34,881 INFO L226 Difference]: Without dead ends: 3335 [2021-12-16 02:01:34,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:01:34,886 INFO L933 BasicCegarLoop]: 4118 mSDtfsCounter, 4257 mSDsluCounter, 16125 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4267 SdHoareTripleChecker+Valid, 20243 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:34,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4267 Valid, 20243 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:01:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-16 02:01:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3104. [2021-12-16 02:01:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2940 states have (on average 1.75) internal successors, (5145), 2950 states have internal predecessors, (5145), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-16 02:01:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5380 transitions. [2021-12-16 02:01:35,072 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5380 transitions. Word has length 68 [2021-12-16 02:01:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5380 transitions. [2021-12-16 02:01:35,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5380 transitions. [2021-12-16 02:01:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:01:35,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:35,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:35,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:01:35,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:35,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-16 02:01:35,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:35,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962177821] [2021-12-16 02:01:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:35,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:01:35,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962177821] [2021-12-16 02:01:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962177821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:35,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:35,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:01:35,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210605425] [2021-12-16 02:01:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:01:35,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:01:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:01:35,163 INFO L87 Difference]: Start difference. First operand 3104 states and 5380 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:35,658 INFO L93 Difference]: Finished difference Result 4949 states and 8091 transitions. [2021-12-16 02:01:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:01:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-16 02:01:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:35,672 INFO L225 Difference]: With dead ends: 4949 [2021-12-16 02:01:35,672 INFO L226 Difference]: Without dead ends: 3977 [2021-12-16 02:01:35,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:01:35,679 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 4481 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4506 SdHoareTripleChecker+Valid, 16555 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:35,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4506 Valid, 16555 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:01:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2021-12-16 02:01:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3634. [2021-12-16 02:01:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3380 states have (on average 1.7044378698224851) internal successors, (5761), 3399 states have internal predecessors, (5761), 156 states have call successors, (156), 84 states have call predecessors, (156), 96 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2021-12-16 02:01:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6118 transitions. [2021-12-16 02:01:35,778 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6118 transitions. Word has length 68 [2021-12-16 02:01:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:35,778 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6118 transitions. [2021-12-16 02:01:35,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:01:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6118 transitions. [2021-12-16 02:01:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 02:01:35,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:35,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:35,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:01:35,783 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-16 02:01:35,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053917048] [2021-12-16 02:01:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:35,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:01:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 02:01:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 02:01:35,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:35,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053917048] [2021-12-16 02:01:35,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053917048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:35,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999940648] [2021-12-16 02:01:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:35,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:35,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:35,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:35,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:01:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:01:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:01:36,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999940648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:36,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:36,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 02:01:36,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14413374] [2021-12-16 02:01:36,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:36,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:36,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:36,211 INFO L87 Difference]: Start difference. First operand 3634 states and 6118 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:01:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:36,413 INFO L93 Difference]: Finished difference Result 6567 states and 10352 transitions. [2021-12-16 02:01:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-16 02:01:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:36,483 INFO L225 Difference]: With dead ends: 6567 [2021-12-16 02:01:36,483 INFO L226 Difference]: Without dead ends: 5065 [2021-12-16 02:01:36,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:36,489 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4097 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:36,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:01:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2021-12-16 02:01:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 5035. [2021-12-16 02:01:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 4547 states have (on average 1.633164723993842) internal successors, (7426), 4583 states have internal predecessors, (7426), 294 states have call successors, (294), 168 states have call predecessors, (294), 192 states have return successors, (377), 291 states have call predecessors, (377), 294 states have call successors, (377) [2021-12-16 02:01:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8097 transitions. [2021-12-16 02:01:36,629 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 8097 transitions. Word has length 110 [2021-12-16 02:01:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:36,630 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 8097 transitions. [2021-12-16 02:01:36,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:01:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 8097 transitions. [2021-12-16 02:01:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 02:01:36,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:36,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:36,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:36,859 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-16 02:01:36,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60196490] [2021-12-16 02:01:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:01:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:37,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 02:01:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 02:01:37,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60196490] [2021-12-16 02:01:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60196490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149370527] [2021-12-16 02:01:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:37,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:37,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:37,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:01:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:01:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:01:37,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:37,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149370527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:37,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:37,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:37,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949452361] [2021-12-16 02:01:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:37,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:37,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:37,363 INFO L87 Difference]: Start difference. First operand 5035 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:01:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:37,564 INFO L93 Difference]: Finished difference Result 10695 states and 16311 transitions. [2021-12-16 02:01:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:37,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2021-12-16 02:01:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:37,585 INFO L225 Difference]: With dead ends: 10695 [2021-12-16 02:01:37,586 INFO L226 Difference]: Without dead ends: 7793 [2021-12-16 02:01:37,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:37,595 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 153 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 8435 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:37,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 8435 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2021-12-16 02:01:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7793. [2021-12-16 02:01:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7793 states, 6840 states have (on average 1.557748538011696) internal successors, (10655), 6901 states have internal predecessors, (10655), 567 states have call successors, (567), 336 states have call predecessors, (567), 384 states have return successors, (836), 571 states have call predecessors, (836), 567 states have call successors, (836) [2021-12-16 02:01:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 12058 transitions. [2021-12-16 02:01:37,900 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 12058 transitions. Word has length 110 [2021-12-16 02:01:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:37,902 INFO L470 AbstractCegarLoop]: Abstraction has 7793 states and 12058 transitions. [2021-12-16 02:01:37,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:01:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 12058 transitions. [2021-12-16 02:01:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-16 02:01:37,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:37,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:37,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:38,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 02:01:38,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-16 02:01:38,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76389302] [2021-12-16 02:01:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:38,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:01:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 02:01:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 02:01:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 02:01:38,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76389302] [2021-12-16 02:01:38,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76389302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998046299] [2021-12-16 02:01:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:38,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:38,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:38,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:01:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:01:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:01:38,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998046299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:38,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:38,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 02:01:38,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514897430] [2021-12-16 02:01:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:38,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:38,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:38,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:38,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:38,554 INFO L87 Difference]: Start difference. First operand 7793 states and 12058 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:01:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:38,771 INFO L93 Difference]: Finished difference Result 18769 states and 27911 transitions. [2021-12-16 02:01:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 142 [2021-12-16 02:01:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:38,817 INFO L225 Difference]: With dead ends: 18769 [2021-12-16 02:01:38,817 INFO L226 Difference]: Without dead ends: 13113 [2021-12-16 02:01:38,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:38,842 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4055 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 4316 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:38,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 4316 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-12-16 02:01:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12999. [2021-12-16 02:01:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 11194 states have (on average 1.5019653385742362) internal successors, (16813), 11313 states have internal predecessors, (16813), 1053 states have call successors, (1053), 654 states have call predecessors, (1053), 750 states have return successors, (1534), 1047 states have call predecessors, (1534), 1053 states have call successors, (1534) [2021-12-16 02:01:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19400 transitions. [2021-12-16 02:01:39,339 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19400 transitions. Word has length 142 [2021-12-16 02:01:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19400 transitions. [2021-12-16 02:01:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:01:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19400 transitions. [2021-12-16 02:01:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 02:01:39,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:39,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:39,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:39,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:39,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-16 02:01:39,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:39,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127340375] [2021-12-16 02:01:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:39,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 02:01:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:01:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 02:01:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 02:01:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-16 02:01:39,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127340375] [2021-12-16 02:01:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127340375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49779701] [2021-12-16 02:01:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:39,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:39,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:39,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:39,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:01:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:01:39,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 02:01:40,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49779701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:40,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:40,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756610156] [2021-12-16 02:01:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:40,032 INFO L87 Difference]: Start difference. First operand 12999 states and 19400 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:01:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:40,406 INFO L93 Difference]: Finished difference Result 25185 states and 37088 transitions. [2021-12-16 02:01:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-16 02:01:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:40,471 INFO L225 Difference]: With dead ends: 25185 [2021-12-16 02:01:40,472 INFO L226 Difference]: Without dead ends: 14321 [2021-12-16 02:01:40,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:40,513 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4074 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:40,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 4170 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14321 states. [2021-12-16 02:01:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14321 to 14321. [2021-12-16 02:01:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 12384 states have (on average 1.448562661498708) internal successors, (17939), 12503 states have internal predecessors, (17939), 1091 states have call successors, (1091), 748 states have call predecessors, (1091), 844 states have return successors, (1586), 1085 states have call predecessors, (1586), 1091 states have call successors, (1586) [2021-12-16 02:01:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 20616 transitions. [2021-12-16 02:01:41,179 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 20616 transitions. Word has length 159 [2021-12-16 02:01:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:41,180 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 20616 transitions. [2021-12-16 02:01:41,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:01:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 20616 transitions. [2021-12-16 02:01:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 02:01:41,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:41,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:41,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:41,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:41,437 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-16 02:01:41,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856927298] [2021-12-16 02:01:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:41,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 02:01:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:01:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 02:01:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 02:01:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 02:01:41,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856927298] [2021-12-16 02:01:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856927298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150152520] [2021-12-16 02:01:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:41,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:41,592 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:41,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:01:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:01:41,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-16 02:01:41,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:41,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150152520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:41,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:41,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501505262] [2021-12-16 02:01:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:41,966 INFO L87 Difference]: Start difference. First operand 14321 states and 20616 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:42,268 INFO L93 Difference]: Finished difference Result 23600 states and 33252 transitions. [2021-12-16 02:01:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-16 02:01:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:42,315 INFO L225 Difference]: With dead ends: 23600 [2021-12-16 02:01:42,315 INFO L226 Difference]: Without dead ends: 15189 [2021-12-16 02:01:42,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:42,338 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4087 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4323 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4323 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2021-12-16 02:01:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15129. [2021-12-16 02:01:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15129 states, 13112 states have (on average 1.423352654057352) internal successors, (18663), 13231 states have internal predecessors, (18663), 1111 states have call successors, (1111), 808 states have call predecessors, (1111), 904 states have return successors, (1666), 1105 states have call predecessors, (1666), 1111 states have call successors, (1666) [2021-12-16 02:01:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 21440 transitions. [2021-12-16 02:01:42,863 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 21440 transitions. Word has length 159 [2021-12-16 02:01:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 15129 states and 21440 transitions. [2021-12-16 02:01:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 21440 transitions. [2021-12-16 02:01:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:01:42,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:42,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:42,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:43,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 02:01:43,110 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-16 02:01:43,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:43,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102109549] [2021-12-16 02:01:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:43,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:01:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:01:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 02:01:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:01:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-16 02:01:43,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:43,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102109549] [2021-12-16 02:01:43,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102109549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625551352] [2021-12-16 02:01:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:43,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:43,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:43,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:01:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:01:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-16 02:01:43,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:43,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625551352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:43,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:43,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:43,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509278627] [2021-12-16 02:01:43,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:43,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:43,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:43,548 INFO L87 Difference]: Start difference. First operand 15129 states and 21440 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:44,115 INFO L93 Difference]: Finished difference Result 39445 states and 54854 transitions. [2021-12-16 02:01:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-16 02:01:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:44,320 INFO L225 Difference]: With dead ends: 39445 [2021-12-16 02:01:44,335 INFO L226 Difference]: Without dead ends: 26455 [2021-12-16 02:01:44,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:44,408 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4101 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:44,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 4332 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26455 states. [2021-12-16 02:01:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26455 to 26061. [2021-12-16 02:01:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26061 states, 22254 states have (on average 1.3790329828345467) internal successors, (30689), 22491 states have internal predecessors, (30689), 2109 states have call successors, (2109), 1504 states have call predecessors, (2109), 1696 states have return successors, (3834), 2097 states have call predecessors, (3834), 2109 states have call successors, (3834) [2021-12-16 02:01:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26061 states to 26061 states and 36632 transitions. [2021-12-16 02:01:45,243 INFO L78 Accepts]: Start accepts. Automaton has 26061 states and 36632 transitions. Word has length 160 [2021-12-16 02:01:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:45,244 INFO L470 AbstractCegarLoop]: Abstraction has 26061 states and 36632 transitions. [2021-12-16 02:01:45,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26061 states and 36632 transitions. [2021-12-16 02:01:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:01:45,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:45,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:45,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 02:01:45,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:45,500 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-16 02:01:45,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908452151] [2021-12-16 02:01:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:45,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:01:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:01:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:01:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:01:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 02:01:45,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908452151] [2021-12-16 02:01:45,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908452151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104861183] [2021-12-16 02:01:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:45,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:45,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:45,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:01:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:45,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:01:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:01:45,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:45,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104861183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:45,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:45,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:45,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291279753] [2021-12-16 02:01:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:45,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:45,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:45,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:45,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:45,975 INFO L87 Difference]: Start difference. First operand 26061 states and 36632 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:01:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:46,770 INFO L93 Difference]: Finished difference Result 52503 states and 73687 transitions. [2021-12-16 02:01:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-16 02:01:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:46,851 INFO L225 Difference]: With dead ends: 52503 [2021-12-16 02:01:46,851 INFO L226 Difference]: Without dead ends: 28589 [2021-12-16 02:01:46,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:46,903 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4089 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 4169 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:46,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 4169 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28589 states. [2021-12-16 02:01:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28589 to 28509. [2021-12-16 02:01:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28509 states, 24590 states have (on average 1.3440016266775112) internal successors, (33049), 24827 states have internal predecessors, (33049), 2109 states have call successors, (2109), 1616 states have call predecessors, (2109), 1808 states have return successors, (3774), 2097 states have call predecessors, (3774), 2109 states have call successors, (3774) [2021-12-16 02:01:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 38932 transitions. [2021-12-16 02:01:47,942 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 38932 transitions. Word has length 160 [2021-12-16 02:01:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:47,942 INFO L470 AbstractCegarLoop]: Abstraction has 28509 states and 38932 transitions. [2021-12-16 02:01:47,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:01:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 38932 transitions. [2021-12-16 02:01:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:01:47,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:47,978 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:48,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:01:48,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:48,217 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:48,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-16 02:01:48,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:48,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370678186] [2021-12-16 02:01:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:48,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:01:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:01:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:01:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:01:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-16 02:01:48,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370678186] [2021-12-16 02:01:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370678186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:48,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045517543] [2021-12-16 02:01:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:48,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:48,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:48,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:48,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:01:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:01:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 02:01:48,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:48,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045517543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:48,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:48,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:48,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763747298] [2021-12-16 02:01:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:48,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:48,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:48,611 INFO L87 Difference]: Start difference. First operand 28509 states and 38932 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:49,955 INFO L93 Difference]: Finished difference Result 78523 states and 106744 transitions. [2021-12-16 02:01:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:01:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-16 02:01:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:50,081 INFO L225 Difference]: With dead ends: 78523 [2021-12-16 02:01:50,081 INFO L226 Difference]: Without dead ends: 52161 [2021-12-16 02:01:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:50,123 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4098 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4341 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:50,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4341 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:01:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52161 states. [2021-12-16 02:01:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52161 to 50647. [2021-12-16 02:01:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50647 states, 43260 states have (on average 1.3100554785020804) internal successors, (56673), 43733 states have internal predecessors, (56673), 3993 states have call successors, (3993), 3008 states have call predecessors, (3993), 3392 states have return successors, (8324), 3969 states have call predecessors, (8324), 3993 states have call successors, (8324) [2021-12-16 02:01:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50647 states to 50647 states and 68990 transitions. [2021-12-16 02:01:52,166 INFO L78 Accepts]: Start accepts. Automaton has 50647 states and 68990 transitions. Word has length 160 [2021-12-16 02:01:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:52,167 INFO L470 AbstractCegarLoop]: Abstraction has 50647 states and 68990 transitions. [2021-12-16 02:01:52,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:01:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50647 states and 68990 transitions. [2021-12-16 02:01:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:01:52,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:52,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:52,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 02:01:52,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 02:01:52,519 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-16 02:01:52,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:52,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323802052] [2021-12-16 02:01:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:52,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:01:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:01:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 02:01:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:01:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-16 02:01:52,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323802052] [2021-12-16 02:01:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323802052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:52,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:52,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:01:52,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646559885] [2021-12-16 02:01:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:52,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:01:52,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:01:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:01:52,589 INFO L87 Difference]: Start difference. First operand 50647 states and 68990 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:01:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:54,324 INFO L93 Difference]: Finished difference Result 96777 states and 129475 transitions. [2021-12-16 02:01:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:01:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-16 02:01:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:54,457 INFO L225 Difference]: With dead ends: 96777 [2021-12-16 02:01:54,458 INFO L226 Difference]: Without dead ends: 48275 [2021-12-16 02:01:54,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:54,536 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:54,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:01:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48275 states. [2021-12-16 02:01:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48275 to 45869. [2021-12-16 02:01:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45869 states, 39502 states have (on average 1.3101868259834946) internal successors, (51755), 40355 states have internal predecessors, (51755), 3045 states have call successors, (3045), 2312 states have call predecessors, (3045), 3320 states have return successors, (6785), 3233 states have call predecessors, (6785), 3045 states have call successors, (6785) [2021-12-16 02:01:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 61585 transitions. [2021-12-16 02:01:56,250 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 61585 transitions. Word has length 160 [2021-12-16 02:01:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:56,250 INFO L470 AbstractCegarLoop]: Abstraction has 45869 states and 61585 transitions. [2021-12-16 02:01:56,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:01:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 61585 transitions. [2021-12-16 02:01:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:01:56,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:56,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:56,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:01:56,309 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-16 02:01:56,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:56,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839086876] [2021-12-16 02:01:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:56,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:01:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:01:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:01:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:01:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 02:01:56,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839086876] [2021-12-16 02:01:56,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839086876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:56,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:01:56,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:01:56,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497459057] [2021-12-16 02:01:56,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:56,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:01:56,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:01:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:01:56,459 INFO L87 Difference]: Start difference. First operand 45869 states and 61585 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:01:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:01:57,817 INFO L93 Difference]: Finished difference Result 81932 states and 108692 transitions. [2021-12-16 02:01:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:01:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-16 02:01:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:01:57,901 INFO L225 Difference]: With dead ends: 81932 [2021-12-16 02:01:57,901 INFO L226 Difference]: Without dead ends: 38200 [2021-12-16 02:01:57,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:57,957 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 282 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:01:57,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:01:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38200 states. [2021-12-16 02:01:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38200 to 35792. [2021-12-16 02:01:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3250524955580683) internal successors, (41017), 31577 states have internal predecessors, (41017), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-16 02:01:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 48195 transitions. [2021-12-16 02:01:59,266 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 48195 transitions. Word has length 160 [2021-12-16 02:01:59,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:01:59,266 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 48195 transitions. [2021-12-16 02:01:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:01:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 48195 transitions. [2021-12-16 02:01:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 02:01:59,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:01:59,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:01:59,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:01:59,310 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:01:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:01:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-16 02:01:59,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:01:59,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10519126] [2021-12-16 02:01:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:59,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:01:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:01:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:01:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:01:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:01:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:01:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:01:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:01:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:01:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:01:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 02:01:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 02:01:59,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:01:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10519126] [2021-12-16 02:01:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10519126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:01:59,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986712391] [2021-12-16 02:01:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:01:59,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:01:59,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:01:59,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:01:59,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 02:01:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:01:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:01:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:01:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 02:01:59,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:01:59,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986712391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:01:59,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:01:59,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:01:59,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090484888] [2021-12-16 02:01:59,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:01:59,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:01:59,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:01:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:01:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:01:59,818 INFO L87 Difference]: Start difference. First operand 35792 states and 48195 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:02:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:02:00,923 INFO L93 Difference]: Finished difference Result 59772 states and 81983 transitions. [2021-12-16 02:02:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:02:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-16 02:02:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:02:01,018 INFO L225 Difference]: With dead ends: 59772 [2021-12-16 02:02:01,019 INFO L226 Difference]: Without dead ends: 35962 [2021-12-16 02:02:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:01,065 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 130 mSDsluCounter, 4115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:02:01,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:02:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35962 states. [2021-12-16 02:02:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35962 to 35792. [2021-12-16 02:02:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35792 states, 30955 states have (on average 1.3027620739783556) internal successors, (40327), 31577 states have internal predecessors, (40327), 2323 states have call successors, (2323), 1776 states have call predecessors, (2323), 2512 states have return successors, (4855), 2454 states have call predecessors, (4855), 2323 states have call successors, (4855) [2021-12-16 02:02:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 47505 transitions. [2021-12-16 02:02:02,761 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 47505 transitions. Word has length 162 [2021-12-16 02:02:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:02:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 47505 transitions. [2021-12-16 02:02:02,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:02:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 47505 transitions. [2021-12-16 02:02:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 02:02:02,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:02:02,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:02:02,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 02:02:03,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 02:02:03,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:02:03,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:02:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-16 02:02:03,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:02:03,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682322936] [2021-12-16 02:02:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:03,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:02:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:02:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:02:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:02:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:02:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:02:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:02:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:02:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:02:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 02:02:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 02:02:03,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:02:03,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682322936] [2021-12-16 02:02:03,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682322936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:02:03,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443068534] [2021-12-16 02:02:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:03,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:02:03,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:02:03,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:02:03,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 02:02:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:03,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:02:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:02:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 02:02:03,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:02:03,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443068534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:02:03,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:02:03,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:02:03,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974765868] [2021-12-16 02:02:03,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:02:03,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:02:03,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:02:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:02:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:03,401 INFO L87 Difference]: Start difference. First operand 35792 states and 47505 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:02:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:02:04,837 INFO L93 Difference]: Finished difference Result 62057 states and 83039 transitions. [2021-12-16 02:02:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:02:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-16 02:02:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:02:04,989 INFO L225 Difference]: With dead ends: 62057 [2021-12-16 02:02:04,989 INFO L226 Difference]: Without dead ends: 30866 [2021-12-16 02:02:05,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:05,050 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 4110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:02:05,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4167 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:02:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30866 states. [2021-12-16 02:02:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30866 to 29554. [2021-12-16 02:02:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2758755015387013) internal successors, (32753), 26155 states have internal predecessors, (32753), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-16 02:02:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 38215 transitions. [2021-12-16 02:02:06,336 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 38215 transitions. Word has length 162 [2021-12-16 02:02:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:02:06,337 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 38215 transitions. [2021-12-16 02:02:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:02:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 38215 transitions. [2021-12-16 02:02:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 02:02:06,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:02:06,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:02:06,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 02:02:06,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 02:02:06,586 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:02:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:02:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-16 02:02:06,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:02:06,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067727553] [2021-12-16 02:02:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:06,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:02:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:02:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:02:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:02:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:02:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:02:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:02:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:02:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 02:02:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 02:02:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 02:02:06,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:02:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067727553] [2021-12-16 02:02:06,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067727553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:02:06,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426085351] [2021-12-16 02:02:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:02:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:02:06,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:02:06,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 02:02:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:02:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:02:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 02:02:07,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:02:07,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426085351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:02:07,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:02:07,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:02:07,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162447187] [2021-12-16 02:02:07,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:02:07,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:02:07,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:02:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:02:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:07,216 INFO L87 Difference]: Start difference. First operand 29554 states and 38215 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:02:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:02:08,443 INFO L93 Difference]: Finished difference Result 49138 states and 64365 transitions. [2021-12-16 02:02:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:02:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-16 02:02:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:02:08,509 INFO L225 Difference]: With dead ends: 49138 [2021-12-16 02:02:08,509 INFO L226 Difference]: Without dead ends: 29688 [2021-12-16 02:02:08,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:08,538 INFO L933 BasicCegarLoop]: 4271 mSDtfsCounter, 123 mSDsluCounter, 4114 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 8385 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:02:08,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 8385 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:02:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-12-16 02:02:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29554. [2021-12-16 02:02:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2505551010868294) internal successors, (32103), 26155 states have internal predecessors, (32103), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-16 02:02:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37565 transitions. [2021-12-16 02:02:09,605 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37565 transitions. Word has length 162 [2021-12-16 02:02:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:02:09,606 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37565 transitions. [2021-12-16 02:02:09,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:02:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37565 transitions. [2021-12-16 02:02:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 02:02:09,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:02:09,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:02:09,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 02:02:09,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:02:09,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:02:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:02:09,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943992, now seen corresponding path program 1 times [2021-12-16 02:02:09,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:02:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301943823] [2021-12-16 02:02:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:09,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:02:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:02:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:02:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:02:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:02:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:02:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:02:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:02:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:02:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:02:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 02:02:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-16 02:02:09,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:02:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301943823] [2021-12-16 02:02:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301943823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:02:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146546193] [2021-12-16 02:02:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:02:09,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:02:09,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:02:09,994 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:02:09,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 02:02:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:02:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:02:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:02:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 02:02:10,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:02:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146546193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:02:10,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:02:10,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:02:10,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411796215] [2021-12-16 02:02:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:02:10,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:02:10,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:02:10,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:02:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:02:10,382 INFO L87 Difference]: Start difference. First operand 29554 states and 37565 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)