./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label40+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_label40+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 bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:44:28,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:44:28,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:44:28,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:44:28,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:44:28,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:44:28,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:44:28,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:44:28,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:44:28,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:44:28,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:44:28,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:44:28,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:44:28,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:44:28,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:44:28,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:44:28,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:44:28,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:44:28,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:44:28,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:44:28,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:44:28,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:44:28,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:44:28,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:44:28,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:44:28,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:44:28,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:44:28,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:44:28,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:44:28,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:44:28,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:44:29,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:44:29,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:44:29,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:44:29,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:44:29,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:44:29,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:44:29,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:44:29,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:44:29,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:44:29,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:44:29,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:44:29,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:44:29,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:44:29,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:44:29,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:44:29,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:44:29,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:44:29,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:44:29,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:44:29,038 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:44:29,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:44:29,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:44:29,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:44:29,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:44:29,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:44:29,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:44:29,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:44:29,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:44:29,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:44:29,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:44:29,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:44:29,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:44:29,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:44:29,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:44:29,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:44:29,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:44:29,043 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:44:29,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:44:29,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:44:29,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:44:29,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd23dfa6335616d8eec5b9783c1f6df5ab0e74e3c379835195329e627de34889 [2021-12-17 18:44:29,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:44:29,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:44:29,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:44:29,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:44:29,321 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:44:29,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-12-17 18:44:29,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c838db1/2b824b82c28c44cab13f067ea0c961d8/FLAG5e9e026df [2021-12-17 18:44:30,193 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:44:30,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c [2021-12-17 18:44:30,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c838db1/2b824b82c28c44cab13f067ea0c961d8/FLAG5e9e026df [2021-12-17 18:44:30,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9c838db1/2b824b82c28c44cab13f067ea0c961d8 [2021-12-17 18:44:30,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:44:30,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:44:30,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:44:30,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:44:30,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:44:30,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:44:30" (1/1) ... [2021-12-17 18:44:30,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f3645b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:30, skipping insertion in model container [2021-12-17 18:44:30,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:44:30" (1/1) ... [2021-12-17 18:44:30,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:44:30,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:44:32,448 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_label40+token_ring.02.cil-1.c[377069,377082] [2021-12-17 18:44:32,479 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_label40+token_ring.02.cil-1.c[383339,383352] [2021-12-17 18:44:32,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:44:32,626 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:44:33,605 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.02.cil-1.c[377069,377082] [2021-12-17 18:44:33,613 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_label40+token_ring.02.cil-1.c[383339,383352] [2021-12-17 18:44:33,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:44:33,694 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:44:33,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33 WrapperNode [2021-12-17 18:44:33,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:44:33,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:44:33,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:44:33,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:44:33,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:33,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,190 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-17 18:44:34,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:44:34,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:44:34,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:44:34,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:44:34,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:44:34,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:44:34,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:44:34,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:44:34,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (1/1) ... [2021-12-17 18:44:34,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:44:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:34,605 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) [2021-12-17 18:44:34,627 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 [2021-12-17 18:44:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:44:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:44:34,643 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:44:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:44:34,643 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:44:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:44:34,644 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:44:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:44:34,644 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:44:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:44:34,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:44:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:44:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:44:34,645 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:44:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:44:34,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:44:34,766 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:44:34,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:44:40,440 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:44:40,464 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:44:40,465 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-17 18:44:40,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:44:40 BoogieIcfgContainer [2021-12-17 18:44:40,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:44:40,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:44:40,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:44:40,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:44:40,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:44:30" (1/3) ... [2021-12-17 18:44:40,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd0265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:44:40, skipping insertion in model container [2021-12-17 18:44:40,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:44:33" (2/3) ... [2021-12-17 18:44:40,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd0265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:44:40, skipping insertion in model container [2021-12-17 18:44:40,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:44:40" (3/3) ... [2021-12-17 18:44:40,479 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.02.cil-1.c [2021-12-17 18:44:40,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:44:40,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:44:40,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:44:40,550 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 [2021-12-17 18:44:40,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:44:40,595 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) [2021-12-17 18:44:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:40,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:40,604 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] [2021-12-17 18:44:40,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-17 18:44:40,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:40,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361320877] [2021-12-17 18:44:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:40,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:40,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361320877] [2021-12-17 18:44:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361320877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:40,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:40,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:44:40,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905939125] [2021-12-17 18:44:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:44:40,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:44:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:44:41,026 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) [2021-12-17 18:44:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:42,040 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-17 18:44:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:44:42,043 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 [2021-12-17 18:44:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:42,063 INFO L225 Difference]: With dead ends: 4802 [2021-12-17 18:44:42,064 INFO L226 Difference]: Without dead ends: 2427 [2021-12-17 18:44:42,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:44:42,074 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:42,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:44:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-17 18:44:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-17 18:44:42,174 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) [2021-12-17 18:44:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-17 18:44:42,186 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-17 18:44:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:42,186 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-17 18:44:42,187 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) [2021-12-17 18:44:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-17 18:44:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:42,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:42,190 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] [2021-12-17 18:44:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:44:42,191 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-17 18:44:42,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727256396] [2021-12-17 18:44:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:42,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727256396] [2021-12-17 18:44:42,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727256396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:42,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:42,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:44:42,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337750487] [2021-12-17 18:44:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:42,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:44:42,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:44:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:44:42,318 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) [2021-12-17 18:44:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:43,169 INFO L93 Difference]: Finished difference Result 2807 states and 4974 transitions. [2021-12-17 18:44:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:44:43,169 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 [2021-12-17 18:44:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:43,185 INFO L225 Difference]: With dead ends: 2807 [2021-12-17 18:44:43,186 INFO L226 Difference]: Without dead ends: 2574 [2021-12-17 18:44:43,192 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 [2021-12-17 18:44:43,194 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4351 mSDsluCounter, 16464 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 20710 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:43,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 20710 Invalid, 877 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:44:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-17 18:44:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2473. [2021-12-17 18:44:43,251 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) [2021-12-17 18:44:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4470 transitions. [2021-12-17 18:44:43,261 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4470 transitions. Word has length 68 [2021-12-17 18:44:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:43,262 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4470 transitions. [2021-12-17 18:44:43,262 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) [2021-12-17 18:44:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4470 transitions. [2021-12-17 18:44:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:43,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:43,264 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] [2021-12-17 18:44:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:44:43,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-17 18:44:43,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215373887] [2021-12-17 18:44:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:43,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:43,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215373887] [2021-12-17 18:44:43,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215373887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:43,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:43,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:44:43,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432041055] [2021-12-17 18:44:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:43,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:44:43,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:44:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:44:43,373 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) [2021-12-17 18:44:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:44,211 INFO L93 Difference]: Finished difference Result 3193 states and 5538 transitions. [2021-12-17 18:44:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:44:44,212 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 [2021-12-17 18:44:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:44,225 INFO L225 Difference]: With dead ends: 3193 [2021-12-17 18:44:44,225 INFO L226 Difference]: Without dead ends: 2851 [2021-12-17 18:44:44,228 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 [2021-12-17 18:44:44,229 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4383 mSDsluCounter, 16279 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:44,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 20448 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:44:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-17 18:44:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2692. [2021-12-17 18:44:44,288 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) [2021-12-17 18:44:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 4787 transitions. [2021-12-17 18:44:44,299 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 4787 transitions. Word has length 68 [2021-12-17 18:44:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:44,299 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 4787 transitions. [2021-12-17 18:44:44,300 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) [2021-12-17 18:44:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 4787 transitions. [2021-12-17 18:44:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:44,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:44,302 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] [2021-12-17 18:44:44,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:44:44,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-17 18:44:44,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:44,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750601755] [2021-12-17 18:44:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:44,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:44,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:44,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750601755] [2021-12-17 18:44:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750601755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:44,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:44,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:44:44,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436051879] [2021-12-17 18:44:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:44,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:44:44,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:44:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:44:44,381 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) [2021-12-17 18:44:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:45,402 INFO L93 Difference]: Finished difference Result 4037 states and 6769 transitions. [2021-12-17 18:44:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:44:45,403 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 [2021-12-17 18:44:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:45,432 INFO L225 Difference]: With dead ends: 4037 [2021-12-17 18:44:45,432 INFO L226 Difference]: Without dead ends: 3476 [2021-12-17 18:44:45,435 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 [2021-12-17 18:44:45,436 INFO L933 BasicCegarLoop]: 4255 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:45,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20704 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:44:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-17 18:44:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 3104. [2021-12-17 18:44:45,514 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) [2021-12-17 18:44:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5389 transitions. [2021-12-17 18:44:45,528 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5389 transitions. Word has length 68 [2021-12-17 18:44:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:45,529 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5389 transitions. [2021-12-17 18:44:45,529 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) [2021-12-17 18:44:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5389 transitions. [2021-12-17 18:44:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:45,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:45,531 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] [2021-12-17 18:44:45,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:44:45,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-17 18:44:45,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:45,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569333840] [2021-12-17 18:44:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:45,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:45,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569333840] [2021-12-17 18:44:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569333840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:45,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:45,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:44:45,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100839140] [2021-12-17 18:44:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:44:45,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:44:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:44:45,624 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) [2021-12-17 18:44:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:46,085 INFO L93 Difference]: Finished difference Result 4308 states and 7182 transitions. [2021-12-17 18:44:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:44:46,085 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 [2021-12-17 18:44:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:46,100 INFO L225 Difference]: With dead ends: 4308 [2021-12-17 18:44:46,101 INFO L226 Difference]: Without dead ends: 3335 [2021-12-17 18:44:46,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:44:46,106 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 [2021-12-17 18:44:46,106 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] [2021-12-17 18:44:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-17 18:44:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3104. [2021-12-17 18:44:46,189 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) [2021-12-17 18:44:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5380 transitions. [2021-12-17 18:44:46,198 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5380 transitions. Word has length 68 [2021-12-17 18:44:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:46,199 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5380 transitions. [2021-12-17 18:44:46,199 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) [2021-12-17 18:44:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5380 transitions. [2021-12-17 18:44:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 18:44:46,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:46,201 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] [2021-12-17 18:44:46,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:44:46,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-17 18:44:46,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:46,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573701083] [2021-12-17 18:44:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:46,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:44:46,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:46,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573701083] [2021-12-17 18:44:46,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573701083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:46,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:44:46,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:44:46,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458789123] [2021-12-17 18:44:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:44:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:44:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:44:46,267 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) [2021-12-17 18:44:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:47,000 INFO L93 Difference]: Finished difference Result 4949 states and 8091 transitions. [2021-12-17 18:44:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:44:47,001 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 [2021-12-17 18:44:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:47,018 INFO L225 Difference]: With dead ends: 4949 [2021-12-17 18:44:47,019 INFO L226 Difference]: Without dead ends: 3977 [2021-12-17 18:44:47,023 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 [2021-12-17 18:44:47,024 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 4481 mSDsluCounter, 12257 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:47,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4506 Valid, 16555 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 18:44:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2021-12-17 18:44:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3634. [2021-12-17 18:44:47,124 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) [2021-12-17 18:44:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6118 transitions. [2021-12-17 18:44:47,208 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6118 transitions. Word has length 68 [2021-12-17 18:44:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:47,208 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6118 transitions. [2021-12-17 18:44:47,209 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) [2021-12-17 18:44:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6118 transitions. [2021-12-17 18:44:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 18:44:47,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:47,214 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] [2021-12-17 18:44:47,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:44:47,214 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-17 18:44:47,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130339184] [2021-12-17 18:44:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:47,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 18:44:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:44:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:44:47,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130339184] [2021-12-17 18:44:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130339184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009012499] [2021-12-17 18:44:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:47,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:47,348 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) [2021-12-17 18:44:47,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:44:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:44:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:44:47,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:47,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009012499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:47,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:47,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:44:47,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713094576] [2021-12-17 18:44:47,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:47,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:47,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:47,634 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) [2021-12-17 18:44:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:47,773 INFO L93 Difference]: Finished difference Result 6567 states and 10352 transitions. [2021-12-17 18:44:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:47,773 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 [2021-12-17 18:44:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:47,796 INFO L225 Difference]: With dead ends: 6567 [2021-12-17 18:44:47,796 INFO L226 Difference]: Without dead ends: 5065 [2021-12-17 18:44:47,804 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 [2021-12-17 18:44:47,804 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4097 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:44:47,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:44:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2021-12-17 18:44:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 5035. [2021-12-17 18:44:47,973 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) [2021-12-17 18:44:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 8097 transitions. [2021-12-17 18:44:47,988 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 8097 transitions. Word has length 110 [2021-12-17 18:44:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:47,989 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 8097 transitions. [2021-12-17 18:44:47,989 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) [2021-12-17 18:44:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 8097 transitions. [2021-12-17 18:44:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 18:44:47,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:47,995 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] [2021-12-17 18:44:48,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:48,211 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 [2021-12-17 18:44:48,212 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-17 18:44:48,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:48,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398449805] [2021-12-17 18:44:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:48,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 18:44:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:44:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:44:48,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:48,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398449805] [2021-12-17 18:44:48,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398449805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198610217] [2021-12-17 18:44:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:48,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:48,336 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) [2021-12-17 18:44:48,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:44:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:44:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 18:44:48,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:48,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198610217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:48,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:48,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:44:48,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970212986] [2021-12-17 18:44:48,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:48,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:48,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:48,620 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) [2021-12-17 18:44:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:48,853 INFO L93 Difference]: Finished difference Result 10695 states and 16311 transitions. [2021-12-17 18:44:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:48,853 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 [2021-12-17 18:44:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:48,887 INFO L225 Difference]: With dead ends: 10695 [2021-12-17 18:44:48,887 INFO L226 Difference]: Without dead ends: 7793 [2021-12-17 18:44:48,899 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 [2021-12-17 18:44:48,900 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 [2021-12-17 18:44:48,900 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] [2021-12-17 18:44:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2021-12-17 18:44:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7793. [2021-12-17 18:44:49,215 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) [2021-12-17 18:44:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7793 states to 7793 states and 12058 transitions. [2021-12-17 18:44:49,238 INFO L78 Accepts]: Start accepts. Automaton has 7793 states and 12058 transitions. Word has length 110 [2021-12-17 18:44:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:49,239 INFO L470 AbstractCegarLoop]: Abstraction has 7793 states and 12058 transitions. [2021-12-17 18:44:49,239 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) [2021-12-17 18:44:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7793 states and 12058 transitions. [2021-12-17 18:44:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 18:44:49,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:49,255 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] [2021-12-17 18:44:49,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:49,463 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 [2021-12-17 18:44:49,463 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-17 18:44:49,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916640557] [2021-12-17 18:44:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:49,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 18:44:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 18:44:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 18:44:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 18:44:49,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916640557] [2021-12-17 18:44:49,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916640557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:49,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400286967] [2021-12-17 18:44:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:49,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:49,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:49,577 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) [2021-12-17 18:44:49,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:44:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:44:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 18:44:49,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:49,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400286967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:49,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:49,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:44:49,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115467812] [2021-12-17 18:44:49,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:49,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:49,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:49,949 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) [2021-12-17 18:44:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:50,256 INFO L93 Difference]: Finished difference Result 18769 states and 27911 transitions. [2021-12-17 18:44:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:50,256 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 [2021-12-17 18:44:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:50,308 INFO L225 Difference]: With dead ends: 18769 [2021-12-17 18:44:50,308 INFO L226 Difference]: Without dead ends: 13113 [2021-12-17 18:44:50,332 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 [2021-12-17 18:44:50,333 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 [2021-12-17 18:44:50,333 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] [2021-12-17 18:44:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-12-17 18:44:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12999. [2021-12-17 18:44:50,801 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) [2021-12-17 18:44:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19400 transitions. [2021-12-17 18:44:50,846 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19400 transitions. Word has length 142 [2021-12-17 18:44:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:50,847 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19400 transitions. [2021-12-17 18:44:50,847 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) [2021-12-17 18:44:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19400 transitions. [2021-12-17 18:44:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 18:44:50,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:50,881 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] [2021-12-17 18:44:50,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:51,095 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 [2021-12-17 18:44:51,096 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-17 18:44:51,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:51,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279010553] [2021-12-17 18:44:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:51,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 18:44:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 18:44:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:44:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 18:44:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 18:44:51,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279010553] [2021-12-17 18:44:51,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279010553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591905866] [2021-12-17 18:44:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:51,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:51,211 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) [2021-12-17 18:44:51,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:44:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:44:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 18:44:51,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591905866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:51,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:44:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82373775] [2021-12-17 18:44:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:51,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:51,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:51,639 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) [2021-12-17 18:44:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:52,067 INFO L93 Difference]: Finished difference Result 25185 states and 37088 transitions. [2021-12-17 18:44:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:52,067 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 [2021-12-17 18:44:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:52,119 INFO L225 Difference]: With dead ends: 25185 [2021-12-17 18:44:52,120 INFO L226 Difference]: Without dead ends: 14321 [2021-12-17 18:44:52,155 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 [2021-12-17 18:44:52,156 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 [2021-12-17 18:44:52,156 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] [2021-12-17 18:44:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14321 states. [2021-12-17 18:44:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14321 to 14321. [2021-12-17 18:44:52,597 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) [2021-12-17 18:44:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 20616 transitions. [2021-12-17 18:44:52,638 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 20616 transitions. Word has length 159 [2021-12-17 18:44:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:52,639 INFO L470 AbstractCegarLoop]: Abstraction has 14321 states and 20616 transitions. [2021-12-17 18:44:52,639 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) [2021-12-17 18:44:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 20616 transitions. [2021-12-17 18:44:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 18:44:52,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:52,668 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] [2021-12-17 18:44:52,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:52,883 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 [2021-12-17 18:44:52,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-17 18:44:52,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901255] [2021-12-17 18:44:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:52,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 18:44:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 18:44:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:44:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:52,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 18:44:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 18:44:53,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901255] [2021-12-17 18:44:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131901255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378194795] [2021-12-17 18:44:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:53,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:53,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:53,004 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) [2021-12-17 18:44:53,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 18:44:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:44:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 18:44:53,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378194795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:53,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:53,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:44:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371543524] [2021-12-17 18:44:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:53,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:53,371 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) [2021-12-17 18:44:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:53,734 INFO L93 Difference]: Finished difference Result 23600 states and 33252 transitions. [2021-12-17 18:44:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:53,735 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 [2021-12-17 18:44:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:53,790 INFO L225 Difference]: With dead ends: 23600 [2021-12-17 18:44:53,791 INFO L226 Difference]: Without dead ends: 15189 [2021-12-17 18:44:53,819 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 [2021-12-17 18:44:53,820 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 [2021-12-17 18:44:53,820 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] [2021-12-17 18:44:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2021-12-17 18:44:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 15129. [2021-12-17 18:44:54,389 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) [2021-12-17 18:44:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15129 states to 15129 states and 21440 transitions. [2021-12-17 18:44:54,432 INFO L78 Accepts]: Start accepts. Automaton has 15129 states and 21440 transitions. Word has length 159 [2021-12-17 18:44:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:54,432 INFO L470 AbstractCegarLoop]: Abstraction has 15129 states and 21440 transitions. [2021-12-17 18:44:54,432 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) [2021-12-17 18:44:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15129 states and 21440 transitions. [2021-12-17 18:44:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 18:44:54,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:54,461 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] [2021-12-17 18:44:54,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:54,675 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 [2021-12-17 18:44:54,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-17 18:44:54,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:54,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529455581] [2021-12-17 18:44:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:54,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 18:44:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 18:44:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 18:44:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 18:44:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 18:44:54,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529455581] [2021-12-17 18:44:54,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529455581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296943086] [2021-12-17 18:44:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:54,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:54,799 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) [2021-12-17 18:44:54,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 18:44:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:44:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 18:44:55,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:55,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296943086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:55,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:55,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:44:55,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129367882] [2021-12-17 18:44:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:55,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:55,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:55,176 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) [2021-12-17 18:44:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:55,897 INFO L93 Difference]: Finished difference Result 39445 states and 54854 transitions. [2021-12-17 18:44:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:55,898 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 [2021-12-17 18:44:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:55,993 INFO L225 Difference]: With dead ends: 39445 [2021-12-17 18:44:55,993 INFO L226 Difference]: Without dead ends: 26455 [2021-12-17 18:44:56,020 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 [2021-12-17 18:44:56,021 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 [2021-12-17 18:44:56,021 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] [2021-12-17 18:44:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26455 states. [2021-12-17 18:44:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26455 to 26061. [2021-12-17 18:44:56,967 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) [2021-12-17 18:44:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26061 states to 26061 states and 36632 transitions. [2021-12-17 18:44:57,046 INFO L78 Accepts]: Start accepts. Automaton has 26061 states and 36632 transitions. Word has length 160 [2021-12-17 18:44:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:57,046 INFO L470 AbstractCegarLoop]: Abstraction has 26061 states and 36632 transitions. [2021-12-17 18:44:57,047 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) [2021-12-17 18:44:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 26061 states and 36632 transitions. [2021-12-17 18:44:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 18:44:57,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:57,094 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] [2021-12-17 18:44:57,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:57,319 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 [2021-12-17 18:44:57,319 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:57,320 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-17 18:44:57,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824703477] [2021-12-17 18:44:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:57,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:44:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:44:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:44:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:44:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:44:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 18:44:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 18:44:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:44:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:44:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 18:44:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 18:44:57,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:44:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824703477] [2021-12-17 18:44:57,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824703477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:44:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716834605] [2021-12-17 18:44:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:57,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:44:57,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:44:57,432 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) [2021-12-17 18:44:57,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 18:44:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:44:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:44:57,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:44:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:44:57,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:44:57,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716834605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:44:57,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:44:57,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:44:57,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688947701] [2021-12-17 18:44:57,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:44:57,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:44:57,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:44:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:44:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:44:57,805 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) [2021-12-17 18:44:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:44:58,581 INFO L93 Difference]: Finished difference Result 52503 states and 73687 transitions. [2021-12-17 18:44:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:44:58,581 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 [2021-12-17 18:44:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:44:58,689 INFO L225 Difference]: With dead ends: 52503 [2021-12-17 18:44:58,689 INFO L226 Difference]: Without dead ends: 28589 [2021-12-17 18:44:58,739 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 [2021-12-17 18:44:58,741 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 [2021-12-17 18:44:58,741 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] [2021-12-17 18:44:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28589 states. [2021-12-17 18:44:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28589 to 28509. [2021-12-17 18:44:59,627 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) [2021-12-17 18:44:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 38932 transitions. [2021-12-17 18:44:59,693 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 38932 transitions. Word has length 160 [2021-12-17 18:44:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:44:59,693 INFO L470 AbstractCegarLoop]: Abstraction has 28509 states and 38932 transitions. [2021-12-17 18:44:59,693 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) [2021-12-17 18:44:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 38932 transitions. [2021-12-17 18:44:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 18:44:59,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:44:59,737 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] [2021-12-17 18:44:59,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 18:44:59,965 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 [2021-12-17 18:44:59,966 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:44:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:44:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-17 18:44:59,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:44:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234271341] [2021-12-17 18:44:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:44:59,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:44:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 18:45:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 18:45:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:45:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 18:45:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 18:45:00,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234271341] [2021-12-17 18:45:00,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234271341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919513735] [2021-12-17 18:45:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:00,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:00,100 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) [2021-12-17 18:45:00,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 18:45:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:45:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 18:45:00,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:00,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919513735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:00,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:00,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:00,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388054047] [2021-12-17 18:45:00,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:00,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:00,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:00,431 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) [2021-12-17 18:45:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:01,489 INFO L93 Difference]: Finished difference Result 78523 states and 106744 transitions. [2021-12-17 18:45:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:01,489 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 [2021-12-17 18:45:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:01,678 INFO L225 Difference]: With dead ends: 78523 [2021-12-17 18:45:01,679 INFO L226 Difference]: Without dead ends: 52161 [2021-12-17 18:45:01,756 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 [2021-12-17 18:45:01,757 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 [2021-12-17 18:45:01,757 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] [2021-12-17 18:45:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52161 states. [2021-12-17 18:45:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52161 to 50647. [2021-12-17 18:45:03,708 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) [2021-12-17 18:45:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50647 states to 50647 states and 68990 transitions. [2021-12-17 18:45:03,838 INFO L78 Accepts]: Start accepts. Automaton has 50647 states and 68990 transitions. Word has length 160 [2021-12-17 18:45:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:03,839 INFO L470 AbstractCegarLoop]: Abstraction has 50647 states and 68990 transitions. [2021-12-17 18:45:03,839 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) [2021-12-17 18:45:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 50647 states and 68990 transitions. [2021-12-17 18:45:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 18:45:03,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:03,923 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] [2021-12-17 18:45:03,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 18:45:04,139 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 [2021-12-17 18:45:04,139 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-17 18:45:04,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45798634] [2021-12-17 18:45:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:04,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 18:45:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 18:45:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-17 18:45:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 18:45:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 18:45:04,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45798634] [2021-12-17 18:45:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45798634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:04,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:04,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 18:45:04,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837730527] [2021-12-17 18:45:04,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:04,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 18:45:04,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 18:45:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 18:45:04,403 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) [2021-12-17 18:45:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:05,821 INFO L93 Difference]: Finished difference Result 96777 states and 129475 transitions. [2021-12-17 18:45:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 18:45:05,822 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 [2021-12-17 18:45:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:05,958 INFO L225 Difference]: With dead ends: 96777 [2021-12-17 18:45:05,958 INFO L226 Difference]: Without dead ends: 48275 [2021-12-17 18:45:06,035 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 [2021-12-17 18:45:06,035 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 282 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 16144 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:06,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16144 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 18:45:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48275 states. [2021-12-17 18:45:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48275 to 45869. [2021-12-17 18:45:07,707 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) [2021-12-17 18:45:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 61585 transitions. [2021-12-17 18:45:07,805 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 61585 transitions. Word has length 160 [2021-12-17 18:45:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:07,806 INFO L470 AbstractCegarLoop]: Abstraction has 45869 states and 61585 transitions. [2021-12-17 18:45:07,806 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) [2021-12-17 18:45:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 61585 transitions. [2021-12-17 18:45:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 18:45:07,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:07,865 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] [2021-12-17 18:45:07,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 18:45:07,865 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-17 18:45:07,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489081133] [2021-12-17 18:45:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:07,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 18:45:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 18:45:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:45:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 18:45:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 18:45:07,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:07,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489081133] [2021-12-17 18:45:07,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489081133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:07,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:07,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 18:45:07,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249975488] [2021-12-17 18:45:07,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:07,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 18:45:07,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 18:45:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 18:45:07,935 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) [2021-12-17 18:45:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:09,330 INFO L93 Difference]: Finished difference Result 81932 states and 108692 transitions. [2021-12-17 18:45:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 18:45:09,331 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 [2021-12-17 18:45:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:09,418 INFO L225 Difference]: With dead ends: 81932 [2021-12-17 18:45:09,418 INFO L226 Difference]: Without dead ends: 38200 [2021-12-17 18:45:09,473 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 [2021-12-17 18:45:09,474 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:09,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 16142 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 18:45:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38200 states. [2021-12-17 18:45:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38200 to 35792. [2021-12-17 18:45:10,630 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) [2021-12-17 18:45:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 48195 transitions. [2021-12-17 18:45:10,706 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 48195 transitions. Word has length 160 [2021-12-17 18:45:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:10,706 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 48195 transitions. [2021-12-17 18:45:10,707 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) [2021-12-17 18:45:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 48195 transitions. [2021-12-17 18:45:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 18:45:10,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:10,748 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] [2021-12-17 18:45:10,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 18:45:10,749 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-17 18:45:10,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289927940] [2021-12-17 18:45:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:10,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 18:45:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 18:45:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:45:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 18:45:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 18:45:10,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289927940] [2021-12-17 18:45:10,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289927940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287892043] [2021-12-17 18:45:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:10,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:10,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:10,844 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) [2021-12-17 18:45:10,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 18:45:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:45:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 18:45:11,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:11,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287892043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:11,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:11,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:11,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186558996] [2021-12-17 18:45:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:11,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:11,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:11,208 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) [2021-12-17 18:45:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:12,329 INFO L93 Difference]: Finished difference Result 59772 states and 81983 transitions. [2021-12-17 18:45:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:12,329 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 [2021-12-17 18:45:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:12,413 INFO L225 Difference]: With dead ends: 59772 [2021-12-17 18:45:12,413 INFO L226 Difference]: Without dead ends: 35962 [2021-12-17 18:45:12,458 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 [2021-12-17 18:45:12,459 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 [2021-12-17 18:45:12,459 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] [2021-12-17 18:45:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35962 states. [2021-12-17 18:45:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35962 to 35792. [2021-12-17 18:45:13,665 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) [2021-12-17 18:45:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35792 states to 35792 states and 47505 transitions. [2021-12-17 18:45:13,733 INFO L78 Accepts]: Start accepts. Automaton has 35792 states and 47505 transitions. Word has length 162 [2021-12-17 18:45:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 35792 states and 47505 transitions. [2021-12-17 18:45:13,733 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) [2021-12-17 18:45:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 35792 states and 47505 transitions. [2021-12-17 18:45:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 18:45:13,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:13,774 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] [2021-12-17 18:45:13,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:13,975 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 [2021-12-17 18:45:13,975 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-17 18:45:13,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:13,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268188302] [2021-12-17 18:45:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:13,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 18:45:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 18:45:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:45:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 18:45:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 18:45:14,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:14,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268188302] [2021-12-17 18:45:14,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268188302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982839372] [2021-12-17 18:45:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:14,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:14,070 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) [2021-12-17 18:45:14,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 18:45:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 18:45:14,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982839372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:14,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:14,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:14,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172714117] [2021-12-17 18:45:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:14,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:14,470 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) [2021-12-17 18:45:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:15,312 INFO L93 Difference]: Finished difference Result 62057 states and 83039 transitions. [2021-12-17 18:45:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:15,313 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 [2021-12-17 18:45:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:15,380 INFO L225 Difference]: With dead ends: 62057 [2021-12-17 18:45:15,380 INFO L226 Difference]: Without dead ends: 30866 [2021-12-17 18:45:15,427 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 [2021-12-17 18:45:15,427 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 [2021-12-17 18:45:15,428 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] [2021-12-17 18:45:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30866 states. [2021-12-17 18:45:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30866 to 29554. [2021-12-17 18:45:16,646 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) [2021-12-17 18:45:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 38215 transitions. [2021-12-17 18:45:16,698 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 38215 transitions. Word has length 162 [2021-12-17 18:45:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:16,698 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 38215 transitions. [2021-12-17 18:45:16,698 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) [2021-12-17 18:45:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 38215 transitions. [2021-12-17 18:45:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 18:45:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:16,722 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] [2021-12-17 18:45:16,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:16,923 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 [2021-12-17 18:45:16,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-17 18:45:16,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:16,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244996903] [2021-12-17 18:45:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:16,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:16,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 18:45:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 18:45:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 18:45:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-17 18:45:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 18:45:17,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244996903] [2021-12-17 18:45:17,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244996903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345222568] [2021-12-17 18:45:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:17,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:17,048 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) [2021-12-17 18:45:17,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 18:45:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:45:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 18:45:17,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:17,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345222568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:17,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:17,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:17,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764562882] [2021-12-17 18:45:17,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:17,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:17,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:17,360 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) [2021-12-17 18:45:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:18,169 INFO L93 Difference]: Finished difference Result 49138 states and 64365 transitions. [2021-12-17 18:45:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:18,169 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 [2021-12-17 18:45:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:18,230 INFO L225 Difference]: With dead ends: 49138 [2021-12-17 18:45:18,230 INFO L226 Difference]: Without dead ends: 29688 [2021-12-17 18:45:18,259 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 [2021-12-17 18:45:18,259 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 [2021-12-17 18:45:18,259 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] [2021-12-17 18:45:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-12-17 18:45:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29554. [2021-12-17 18:45:19,316 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) [2021-12-17 18:45:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37565 transitions. [2021-12-17 18:45:19,377 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37565 transitions. Word has length 162 [2021-12-17 18:45:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:19,377 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37565 transitions. [2021-12-17 18:45:19,377 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) [2021-12-17 18:45:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37565 transitions. [2021-12-17 18:45:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 18:45:19,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:19,403 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] [2021-12-17 18:45:19,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:19,603 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 [2021-12-17 18:45:19,604 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943992, now seen corresponding path program 1 times [2021-12-17 18:45:19,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299217858] [2021-12-17 18:45:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:19,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 18:45:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 18:45:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 18:45:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-17 18:45:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 18:45:19,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299217858] [2021-12-17 18:45:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299217858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637878877] [2021-12-17 18:45:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:19,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:19,709 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) [2021-12-17 18:45:19,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 18:45:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:45:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 18:45:20,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:20,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637878877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:20,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:20,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:20,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734577065] [2021-12-17 18:45:20,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:20,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:20,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:20,012 INFO L87 Difference]: Start difference. First operand 29554 states and 37565 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:45:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:20,971 INFO L93 Difference]: Finished difference Result 42489 states and 54427 transitions. [2021-12-17 18:45:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-17 18:45:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:21,027 INFO L225 Difference]: With dead ends: 42489 [2021-12-17 18:45:21,027 INFO L226 Difference]: Without dead ends: 29599 [2021-12-17 18:45:21,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:21,051 INFO L933 BasicCegarLoop]: 4247 mSDtfsCounter, 144 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 8365 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:21,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 8365 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2021-12-17 18:45:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 29554. [2021-12-17 18:45:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29554 states, 25671 states have (on average 1.2412060301507537) internal successors, (31863), 26155 states have internal predecessors, (31863), 1873 states have call successors, (1873), 1434 states have call predecessors, (1873), 2008 states have return successors, (3589), 1972 states have call predecessors, (3589), 1873 states have call successors, (3589) [2021-12-17 18:45:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29554 states to 29554 states and 37325 transitions. [2021-12-17 18:45:21,992 INFO L78 Accepts]: Start accepts. Automaton has 29554 states and 37325 transitions. Word has length 163 [2021-12-17 18:45:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 29554 states and 37325 transitions. [2021-12-17 18:45:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:45:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 29554 states and 37325 transitions. [2021-12-17 18:45:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 18:45:22,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:22,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:22,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 18:45:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:22,218 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1712947354, now seen corresponding path program 1 times [2021-12-17 18:45:22,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:22,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652639480] [2021-12-17 18:45:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:22,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 18:45:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 18:45:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 18:45:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 18:45:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 18:45:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 18:45:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-17 18:45:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-17 18:45:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-17 18:45:22,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:22,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652639480] [2021-12-17 18:45:22,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652639480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:22,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363248393] [2021-12-17 18:45:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:22,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:22,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:22,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:22,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 18:45:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 18:45:22,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363248393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:22,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561747880] [2021-12-17 18:45:22,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:22,598 INFO L87 Difference]: Start difference. First operand 29554 states and 37325 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 18:45:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:23,372 INFO L93 Difference]: Finished difference Result 49006 states and 60989 transitions. [2021-12-17 18:45:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-17 18:45:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:23,436 INFO L225 Difference]: With dead ends: 49006 [2021-12-17 18:45:23,436 INFO L226 Difference]: Without dead ends: 29556 [2021-12-17 18:45:23,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:23,467 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 125 mSDsluCounter, 4126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 8393 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:23,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 8393 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29556 states.