./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bAnd1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/array-crafted/bAnd1.i -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 ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:22:00,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:22:00,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:22:00,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:22:00,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:22:00,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:22:00,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:22:00,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:22:00,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:22:00,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:22:00,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:22:00,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:22:00,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:22:00,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:22:00,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:22:00,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:22:00,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:22:00,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:22:00,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:22:00,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:22:00,565 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:22:00,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:22:00,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:22:00,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:22:00,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:22:00,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:22:00,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:22:00,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:22:00,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:22:00,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:22:00,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:22:00,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:22:00,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:22:00,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:22:00,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:22:00,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:22:00,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:22:00,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:22:00,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:22:00,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:22:00,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:22:00,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:22:00,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:22:00,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:22:00,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:22:00,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:22:00,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:22:00,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:22:00,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:22:00,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:22:00,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:22:00,623 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:22:00,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:22:00,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:22:00,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:22:00,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:22:00,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:22:00,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:22:00,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:22:00,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:22:00,626 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:22:00,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:22:00,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:22:00,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:22:00,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:22:00,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:22:00,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:22:00,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:22:00,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:22:00,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:22:00,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:22:00,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:22:00,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:22:00,629 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:22:00,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:22:00,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:22:00,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 [2022-07-20 21:22:00,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:22:00,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:22:00,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:22:00,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:22:00,905 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:22:00,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd1.i [2022-07-20 21:22:00,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93b4d611/da94cd19562348e5afb20280e487a6b6/FLAG84235b8e7 [2022-07-20 21:22:01,432 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:22:01,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd1.i [2022-07-20 21:22:01,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93b4d611/da94cd19562348e5afb20280e487a6b6/FLAG84235b8e7 [2022-07-20 21:22:01,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93b4d611/da94cd19562348e5afb20280e487a6b6 [2022-07-20 21:22:01,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:22:01,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:22:01,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:22:01,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:22:01,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:22:01,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:22:01" (1/1) ... [2022-07-20 21:22:01,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf5b822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:01, skipping insertion in model container [2022-07-20 21:22:01,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:22:01" (1/1) ... [2022-07-20 21:22:01,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:22:01,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:22:02,038 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/array-crafted/bAnd1.i[1290,1303] [2022-07-20 21:22:02,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:22:02,046 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:22:02,064 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/array-crafted/bAnd1.i[1290,1303] [2022-07-20 21:22:02,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:22:02,076 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:22:02,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02 WrapperNode [2022-07-20 21:22:02,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:22:02,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:22:02,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:22:02,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:22:02,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,107 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-20 21:22:02,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:22:02,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:22:02,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:22:02,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:22:02,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:22:02,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:22:02,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:22:02,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:22:02,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (1/1) ... [2022-07-20 21:22:02,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:22:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:02,185 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) [2022-07-20 21:22:02,197 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 [2022-07-20 21:22:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:22:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:22:02,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-07-20 21:22:02,223 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-07-20 21:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:22:02,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:22:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:22:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:22:02,316 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:22:02,318 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:22:02,534 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:22:02,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:22:02,540 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:22:02,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:22:02 BoogieIcfgContainer [2022-07-20 21:22:02,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:22:02,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:22:02,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:22:02,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:22:02,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:22:01" (1/3) ... [2022-07-20 21:22:02,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c95935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:22:02, skipping insertion in model container [2022-07-20 21:22:02,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:22:02" (2/3) ... [2022-07-20 21:22:02,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c95935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:22:02, skipping insertion in model container [2022-07-20 21:22:02,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:22:02" (3/3) ... [2022-07-20 21:22:02,565 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2022-07-20 21:22:02,579 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:22:02,583 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:22:02,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:22:02,662 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@667bab4b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c64c0e8 [2022-07-20 21:22:02,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:22:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:22:02,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:02,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:02,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -565416169, now seen corresponding path program 1 times [2022-07-20 21:22:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:02,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831914263] [2022-07-20 21:22:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:02,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:22:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:02,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:22:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:22:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:22:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831914263] [2022-07-20 21:22:02,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831914263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:22:02,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:22:02,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:22:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951207275] [2022-07-20 21:22:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:22:02,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:22:02,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:22:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:22:02,962 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:22:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:03,011 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2022-07-20 21:22:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:22:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:22:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:03,022 INFO L225 Difference]: With dead ends: 58 [2022-07-20 21:22:03,023 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:22:03,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:22:03,033 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:03,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:22:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-20 21:22:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-20 21:22:03,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 28 [2022-07-20 21:22:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:03,070 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-20 21:22:03,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:22:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-20 21:22:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:22:03,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:03,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:22:03,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1018640069, now seen corresponding path program 1 times [2022-07-20 21:22:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:03,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29231000] [2022-07-20 21:22:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:22:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:22:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:22:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:22:03,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:03,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29231000] [2022-07-20 21:22:03,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29231000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640268515] [2022-07-20 21:22:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:03,238 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) [2022-07-20 21:22:03,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:22:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:22:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:22:03,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:22:03,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640268515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:22:03,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:22:03,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-20 21:22:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576211515] [2022-07-20 21:22:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:22:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:22:03,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:03,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:22:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:22:03,376 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:22:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:03,397 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-20 21:22:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:22:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-20 21:22:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:03,400 INFO L225 Difference]: With dead ends: 52 [2022-07-20 21:22:03,400 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:22:03,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:22:03,403 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:03,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:22:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-20 21:22:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-20 21:22:03,416 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2022-07-20 21:22:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:03,416 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-20 21:22:03,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 21:22:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-20 21:22:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 21:22:03,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:03,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:03,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:03,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash -497824771, now seen corresponding path program 1 times [2022-07-20 21:22:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779147614] [2022-07-20 21:22:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:22:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 21:22:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-20 21:22:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:22:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:03,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779147614] [2022-07-20 21:22:03,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779147614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:03,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610894174] [2022-07-20 21:22:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:03,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:03,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:03,686 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) [2022-07-20 21:22:03,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:22:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:22:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:22:03,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:22:03,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610894174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:22:03,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:22:03,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-20 21:22:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341201022] [2022-07-20 21:22:03,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:22:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:22:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:22:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:22:03,773 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:22:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:03,784 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-07-20 21:22:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:22:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-20 21:22:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:03,786 INFO L225 Difference]: With dead ends: 57 [2022-07-20 21:22:03,786 INFO L226 Difference]: Without dead ends: 35 [2022-07-20 21:22:03,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:22:03,787 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:03,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-20 21:22:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-07-20 21:22:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-20 21:22:03,793 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2022-07-20 21:22:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:03,799 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-20 21:22:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:22:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-20 21:22:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 21:22:03,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:03,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:03,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:04,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 21:22:04,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1532793032, now seen corresponding path program 1 times [2022-07-20 21:22:04,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:04,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755456875] [2022-07-20 21:22:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:04,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:22:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:22:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-20 21:22:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:22:04,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755456875] [2022-07-20 21:22:04,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755456875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759272726] [2022-07-20 21:22:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:04,124 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) [2022-07-20 21:22:04,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:22:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 21:22:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:22:04,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:22:04,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759272726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:22:04,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:22:04,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-20 21:22:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808629838] [2022-07-20 21:22:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:22:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:22:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:04,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:22:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:22:04,205 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:22:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:04,214 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-07-20 21:22:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:22:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-20 21:22:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:04,216 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:22:04,216 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:22:04,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:22:04,217 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:04,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:22:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-20 21:22:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-20 21:22:04,222 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 42 [2022-07-20 21:22:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:04,224 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-20 21:22:04,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:22:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-20 21:22:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:22:04,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:04,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:04,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:04,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:04,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 164449686, now seen corresponding path program 1 times [2022-07-20 21:22:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:04,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651035499] [2022-07-20 21:22:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-20 21:22:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:22:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-20 21:22:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:22:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651035499] [2022-07-20 21:22:04,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651035499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949368219] [2022-07-20 21:22:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:04,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:04,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:04,551 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) [2022-07-20 21:22:04,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:22:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:22:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:22:04,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:22:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949368219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:04,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:04,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-20 21:22:04,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059871781] [2022-07-20 21:22:04,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 21:22:04,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:04,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 21:22:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:22:04,699 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:04,747 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2022-07-20 21:22:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:22:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-07-20 21:22:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:04,748 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:22:04,748 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 21:22:04,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:22:04,750 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:04,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 21:22:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-07-20 21:22:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-07-20 21:22:04,756 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 44 [2022-07-20 21:22:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:04,756 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-07-20 21:22:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-07-20 21:22:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 21:22:04,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:04,757 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:04,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:04,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -724622569, now seen corresponding path program 2 times [2022-07-20 21:22:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54376740] [2022-07-20 21:22:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:04,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 21:22:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-20 21:22:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-20 21:22:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 21:22:05,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54376740] [2022-07-20 21:22:05,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54376740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983244436] [2022-07-20 21:22:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:22:05,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:05,112 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) [2022-07-20 21:22:05,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:22:05,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:22:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 21:22:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:22:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-20 21:22:05,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983244436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:05,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:05,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-20 21:22:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913458593] [2022-07-20 21:22:05,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:22:05,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:22:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:22:05,353 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:22:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:05,426 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-07-20 21:22:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:22:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-20 21:22:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:05,428 INFO L225 Difference]: With dead ends: 90 [2022-07-20 21:22:05,428 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 21:22:05,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:22:05,430 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:05,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 178 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 21:22:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-20 21:22:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-20 21:22:05,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 62 [2022-07-20 21:22:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:05,436 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-20 21:22:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 21:22:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-20 21:22:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:22:05,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:05,438 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:05,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:05,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1424970623, now seen corresponding path program 3 times [2022-07-20 21:22:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:05,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006580093] [2022-07-20 21:22:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:22:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-20 21:22:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-20 21:22:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:22:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006580093] [2022-07-20 21:22:05,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006580093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983871138] [2022-07-20 21:22:05,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:22:05,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:05,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:05,752 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) [2022-07-20 21:22:05,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:22:05,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:22:05,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:22:05,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:22:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-20 21:22:05,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983871138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:05,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:05,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-20 21:22:05,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403595918] [2022-07-20 21:22:05,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:22:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:22:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:22:05,917 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:05,996 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2022-07-20 21:22:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:22:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-20 21:22:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:05,998 INFO L225 Difference]: With dead ends: 118 [2022-07-20 21:22:05,998 INFO L226 Difference]: Without dead ends: 85 [2022-07-20 21:22:05,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:22:05,999 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:22:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-20 21:22:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-20 21:22:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-07-20 21:22:06,008 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 76 [2022-07-20 21:22:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:06,009 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-07-20 21:22:06,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-07-20 21:22:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 21:22:06,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:06,011 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:06,235 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1349373549, now seen corresponding path program 4 times [2022-07-20 21:22:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221313013] [2022-07-20 21:22:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 21:22:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:06,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-20 21:22:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:06,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-20 21:22:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:22:06,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:06,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221313013] [2022-07-20 21:22:06,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221313013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857317178] [2022-07-20 21:22:06,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:22:06,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:06,448 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) [2022-07-20 21:22:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:22:06,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:22:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:22:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:22:06,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:22:06,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857317178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:06,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:06,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-07-20 21:22:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427043979] [2022-07-20 21:22:06,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:06,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:22:06,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:22:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:22:06,833 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:06,918 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2022-07-20 21:22:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:22:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-07-20 21:22:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:06,920 INFO L225 Difference]: With dead ends: 171 [2022-07-20 21:22:06,921 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 21:22:06,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:22:06,922 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:06,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 164 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 21:22:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-20 21:22:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 104 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2022-07-20 21:22:06,933 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 124 [2022-07-20 21:22:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:06,934 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2022-07-20 21:22:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2022-07-20 21:22:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-20 21:22:06,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:06,941 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:06,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:07,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1124916869, now seen corresponding path program 5 times [2022-07-20 21:22:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068370141] [2022-07-20 21:22:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-20 21:22:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-20 21:22:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:07,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-20 21:22:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-20 21:22:07,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068370141] [2022-07-20 21:22:07,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068370141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254415129] [2022-07-20 21:22:07,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:22:07,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:07,585 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) [2022-07-20 21:22:07,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:22:08,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-20 21:22:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:22:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-07-20 21:22:08,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-07-20 21:22:08,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254415129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:08,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:08,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-07-20 21:22:08,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326709897] [2022-07-20 21:22:08,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:08,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:22:08,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:22:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:22:08,764 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:09,142 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2022-07-20 21:22:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:22:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 148 [2022-07-20 21:22:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:09,145 INFO L225 Difference]: With dead ends: 230 [2022-07-20 21:22:09,145 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 21:22:09,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:22:09,148 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 403 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:09,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 346 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 21:22:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-07-20 21:22:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2777777777777777) internal successors, (207), 162 states have internal predecessors, (207), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2022-07-20 21:22:09,162 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 148 [2022-07-20 21:22:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:09,162 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2022-07-20 21:22:09,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2022-07-20 21:22:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-20 21:22:09,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:09,166 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:09,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:22:09,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1940002591, now seen corresponding path program 6 times [2022-07-20 21:22:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665459973] [2022-07-20 21:22:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-20 21:22:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:09,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-20 21:22:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-20 21:22:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-07-20 21:22:09,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:09,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665459973] [2022-07-20 21:22:09,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665459973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:09,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167532755] [2022-07-20 21:22:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:22:09,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:09,824 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) [2022-07-20 21:22:09,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:22:09,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-20 21:22:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:22:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-07-20 21:22:10,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-07-20 21:22:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167532755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:10,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:10,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-07-20 21:22:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279305899] [2022-07-20 21:22:10,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 21:22:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 21:22:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:22:10,097 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:10,203 INFO L93 Difference]: Finished difference Result 296 states and 392 transitions. [2022-07-20 21:22:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 21:22:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-07-20 21:22:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:10,206 INFO L225 Difference]: With dead ends: 296 [2022-07-20 21:22:10,206 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 21:22:10,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:22:10,209 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:10,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 233 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 21:22:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-07-20 21:22:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 172 states have internal predecessors, (217), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-07-20 21:22:10,236 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 246 [2022-07-20 21:22:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:10,236 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-07-20 21:22:10,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-07-20 21:22:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-20 21:22:10,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:10,242 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:10,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:10,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:22:10,464 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1867095591, now seen corresponding path program 7 times [2022-07-20 21:22:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:10,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750118714] [2022-07-20 21:22:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-20 21:22:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:10,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-20 21:22:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:10,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-20 21:22:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750118714] [2022-07-20 21:22:10,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750118714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:10,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881116319] [2022-07-20 21:22:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:22:10,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:10,905 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) [2022-07-20 21:22:10,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:22:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:22:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:11,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:12,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881116319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:12,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:12,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-07-20 21:22:12,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040494201] [2022-07-20 21:22:12,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:12,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-20 21:22:12,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-20 21:22:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:22:12,027 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:12,167 INFO L93 Difference]: Finished difference Result 355 states and 472 transitions. [2022-07-20 21:22:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:22:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-07-20 21:22:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:12,169 INFO L225 Difference]: With dead ends: 355 [2022-07-20 21:22:12,169 INFO L226 Difference]: Without dead ends: 229 [2022-07-20 21:22:12,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:22:12,171 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:12,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 194 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-20 21:22:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-20 21:22:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2008928571428572) internal successors, (269), 224 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2022-07-20 21:22:12,189 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 256 [2022-07-20 21:22:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:12,190 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2022-07-20 21:22:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2022-07-20 21:22:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-07-20 21:22:12,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:12,194 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:12,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:12,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:22:12,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:12,416 INFO L85 PathProgramCache]: Analyzing trace with hash 316429581, now seen corresponding path program 8 times [2022-07-20 21:22:12,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:12,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761530363] [2022-07-20 21:22:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:13,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-20 21:22:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:13,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-07-20 21:22:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:13,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-07-20 21:22:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:13,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:13,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761530363] [2022-07-20 21:22:13,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761530363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039856277] [2022-07-20 21:22:13,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:22:13,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:13,644 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) [2022-07-20 21:22:13,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:22:13,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:22:13,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:13,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:22:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:14,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-20 21:22:16,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039856277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:16,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:16,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 104 [2022-07-20 21:22:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341123212] [2022-07-20 21:22:16,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-20 21:22:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:16,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-20 21:22:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 21:22:16,666 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 103 states have internal predecessors, (232), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:16,959 INFO L93 Difference]: Finished difference Result 455 states and 596 transitions. [2022-07-20 21:22:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-20 21:22:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 103 states have internal predecessors, (232), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 308 [2022-07-20 21:22:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:16,962 INFO L225 Difference]: With dead ends: 455 [2022-07-20 21:22:16,962 INFO L226 Difference]: Without dead ends: 329 [2022-07-20 21:22:16,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 570 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 21:22:16,966 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:16,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 164 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:22:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-20 21:22:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-07-20 21:22:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.1388888888888888) internal successors, (369), 324 states have internal predecessors, (369), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2022-07-20 21:22:16,977 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 308 [2022-07-20 21:22:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:16,977 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2022-07-20 21:22:16,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.230769230769231) internal successors, (232), 103 states have internal predecessors, (232), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 21:22:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2022-07-20 21:22:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-20 21:22:16,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:16,983 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:17,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:22:17,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1446258289, now seen corresponding path program 9 times [2022-07-20 21:22:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601621815] [2022-07-20 21:22:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-20 21:22:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:17,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-07-20 21:22:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:17,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-07-20 21:22:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 11611 trivial. 0 not checked. [2022-07-20 21:22:17,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:17,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601621815] [2022-07-20 21:22:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601621815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611287047] [2022-07-20 21:22:17,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:22:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:17,657 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) [2022-07-20 21:22:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:22:17,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 21:22:17,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:22:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 11951 trivial. 0 not checked. [2022-07-20 21:22:18,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13621 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13585 trivial. 0 not checked. [2022-07-20 21:22:18,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611287047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:18,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:18,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 32 [2022-07-20 21:22:18,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406932677] [2022-07-20 21:22:18,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:18,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:22:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:22:18,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:22:18,190 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 32 states, 32 states have (on average 3.6875) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:18,449 INFO L93 Difference]: Finished difference Result 483 states and 591 transitions. [2022-07-20 21:22:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:22:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.6875) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 408 [2022-07-20 21:22:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:18,452 INFO L225 Difference]: With dead ends: 483 [2022-07-20 21:22:18,452 INFO L226 Difference]: Without dead ends: 358 [2022-07-20 21:22:18,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:22:18,454 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 363 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-20 21:22:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 352. [2022-07-20 21:22:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.138328530259366) internal successors, (395), 347 states have internal predecessors, (395), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 401 transitions. [2022-07-20 21:22:18,464 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 401 transitions. Word has length 408 [2022-07-20 21:22:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:18,465 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 401 transitions. [2022-07-20 21:22:18,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.6875) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:22:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 401 transitions. [2022-07-20 21:22:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-20 21:22:18,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:18,472 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:18,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:22:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:22:18,691 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1816535908, now seen corresponding path program 10 times [2022-07-20 21:22:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125113694] [2022-07-20 21:22:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:18,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-20 21:22:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:19,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-07-20 21:22:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:19,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2022-07-20 21:22:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 12003 trivial. 0 not checked. [2022-07-20 21:22:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125113694] [2022-07-20 21:22:19,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125113694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070899942] [2022-07-20 21:22:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:22:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:19,092 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) [2022-07-20 21:22:19,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:22:19,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:22:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:22:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:22:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:22:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 12007 trivial. 0 not checked. [2022-07-20 21:22:19,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:22:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14306 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 12003 trivial. 0 not checked. [2022-07-20 21:22:19,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070899942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:22:19,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:22:19,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-07-20 21:22:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113677477] [2022-07-20 21:22:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:22:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:22:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:22:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:22:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:22:19,968 INFO L87 Difference]: Start difference. First operand 352 states and 401 transitions. Second operand has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:22:20,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:22:20,536 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2022-07-20 21:22:20,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 21:22:20,536 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 436 [2022-07-20 21:22:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:22:20,539 INFO L225 Difference]: With dead ends: 619 [2022-07-20 21:22:20,539 INFO L226 Difference]: Without dead ends: 471 [2022-07-20 21:22:20,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 21:22:20,541 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 953 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:22:20,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 382 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:22:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-07-20 21:22:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-07-20 21:22:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.2124463519313304) internal successors, (565), 466 states have internal predecessors, (565), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:22:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 571 transitions. [2022-07-20 21:22:20,555 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 571 transitions. Word has length 436 [2022-07-20 21:22:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:22:20,556 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 571 transitions. [2022-07-20 21:22:20,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 34 states have internal predecessors, (156), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 21:22:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 571 transitions. [2022-07-20 21:22:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-20 21:22:20,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:22:20,561 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 96, 96, 96, 96, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:22:20,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-20 21:22:20,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:22:20,775 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:22:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:22:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1405852409, now seen corresponding path program 11 times [2022-07-20 21:22:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:22:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194573947] [2022-07-20 21:22:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:22:20,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:22:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-20 21:22:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2022-07-20 21:22:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2022-07-20 21:22:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:22:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28739 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 18395 trivial. 0 not checked. [2022-07-20 21:22:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:22:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194573947] [2022-07-20 21:22:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194573947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:22:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416329679] [2022-07-20 21:22:21,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:22:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:22:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:22:21,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:22:21,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process