./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-cav19/array_init_nondet_vars.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:17:04,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:17:04,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:17:04,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:17:04,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:17:04,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:17:04,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:17:04,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:17:04,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:17:04,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:17:04,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:17:04,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:17:04,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:17:04,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:17:04,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:17:04,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:17:04,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:17:04,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:17:04,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:17:04,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:17:04,605 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:17:04,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:17:04,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:17:04,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:17:04,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:17:04,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:17:04,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:17:04,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:17:04,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:17:04,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:17:04,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:17:04,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:17:04,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:17:04,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:17:04,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:17:04,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:17:04,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:17:04,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:17:04,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:17:04,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:17:04,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:17:04,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:17:04,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:17:04,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:17:04,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:17:04,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:17:04,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:17:04,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:17:04,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:17:04,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:17:04,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:17:04,639 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:17:04,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:17:04,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:17:04,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:17:04,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:17:04,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:17:04,641 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:17:04,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:17:04,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:17:04,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:17:04,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:17:04,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:17:04,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:17:04,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:17:04,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:17:04,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-07-19 10:17:04,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:17:04,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:17:04,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:17:04,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:17:04,851 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:17:04,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-19 10:17:04,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bf0494/97597b94b6ce481599d21d77071c37e6/FLAGe75818dc2 [2022-07-19 10:17:05,279 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:17:05,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-19 10:17:05,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bf0494/97597b94b6ce481599d21d77071c37e6/FLAGe75818dc2 [2022-07-19 10:17:05,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0bf0494/97597b94b6ce481599d21d77071c37e6 [2022-07-19 10:17:05,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:17:05,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:17:05,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:17:05,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:17:05,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:17:05,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba785a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05, skipping insertion in model container [2022-07-19 10:17:05,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:17:05,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:17:05,836 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-cav19/array_init_nondet_vars.c[413,426] [2022-07-19 10:17:05,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:17:05,853 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:17:05,863 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-cav19/array_init_nondet_vars.c[413,426] [2022-07-19 10:17:05,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:17:05,880 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:17:05,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05 WrapperNode [2022-07-19 10:17:05,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:17:05,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:17:05,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:17:05,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:17:05,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,908 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-19 10:17:05,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:17:05,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:17:05,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:17:05,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:17:05,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:17:05,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:17:05,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:17:05,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:17:05,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (1/1) ... [2022-07-19 10:17:05,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:17:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:05,961 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) [2022-07-19 10:17:05,982 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 [2022-07-19 10:17:06,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 10:17:06,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 10:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:17:06,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:17:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:17:06,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:17:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:17:06,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:17:06,055 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:17:06,056 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:17:06,177 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:17:06,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:17:06,187 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 10:17:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:17:06 BoogieIcfgContainer [2022-07-19 10:17:06,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:17:06,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:17:06,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:17:06,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:17:06,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:17:05" (1/3) ... [2022-07-19 10:17:06,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b89282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:17:06, skipping insertion in model container [2022-07-19 10:17:06,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:05" (2/3) ... [2022-07-19 10:17:06,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b89282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:17:06, skipping insertion in model container [2022-07-19 10:17:06,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:17:06" (3/3) ... [2022-07-19 10:17:06,202 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-07-19 10:17:06,213 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:17:06,214 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:17:06,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:17:06,273 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@26533ea9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@217f442f [2022-07-19 10:17:06,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:17:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2022-07-19 10:17:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:17:06,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:06,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:06,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2022-07-19 10:17:06,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686181958] [2022-07-19 10:17:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:17:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686181958] [2022-07-19 10:17:06,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686181958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:17:06,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:17:06,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:17:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083971442] [2022-07-19 10:17:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:17:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:17:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:17:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:17:06,503 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:17:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:06,523 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2022-07-19 10:17:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:17:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-19 10:17:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:06,533 INFO L225 Difference]: With dead ends: 47 [2022-07-19 10:17:06,533 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 10:17:06,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:17:06,542 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:06,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:17:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 10:17:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 10:17:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-07-19 10:17:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-19 10:17:06,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2022-07-19 10:17:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:06,572 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-19 10:17:06,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:17:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-19 10:17:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:17:06,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:06,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:06,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:17:06,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2022-07-19 10:17:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:06,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226641496] [2022-07-19 10:17:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:17:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226641496] [2022-07-19 10:17:06,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226641496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:17:06,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:17:06,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:17:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624571264] [2022-07-19 10:17:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:17:06,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:17:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:17:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:17:06,676 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:17:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:06,721 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-19 10:17:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:17:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 10:17:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:06,723 INFO L225 Difference]: With dead ends: 39 [2022-07-19 10:17:06,723 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 10:17:06,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:17:06,725 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:06,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:17:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 10:17:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-19 10:17:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-07-19 10:17:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-19 10:17:06,732 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2022-07-19 10:17:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:06,732 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-19 10:17:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:17:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-19 10:17:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 10:17:06,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:06,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:17:06,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2022-07-19 10:17:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:06,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249867505] [2022-07-19 10:17:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:06,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:17:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249867505] [2022-07-19 10:17:07,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249867505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959137191] [2022-07-19 10:17:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:07,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:07,005 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) [2022-07-19 10:17:07,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:17:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 10:17:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:07,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:17:07,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:17:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:07,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:07,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:17:07,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959137191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:07,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:07,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-19 10:17:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538256298] [2022-07-19 10:17:07,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:07,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:17:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:17:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:17:07,606 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 10:17:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:07,907 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-07-19 10:17:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:17:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-07-19 10:17:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:07,911 INFO L225 Difference]: With dead ends: 48 [2022-07-19 10:17:07,911 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 10:17:07,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:17:07,915 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:07,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 10:17:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-19 10:17:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 10:17:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-19 10:17:07,935 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-07-19 10:17:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:07,936 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-19 10:17:07,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 10:17:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-19 10:17:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 10:17:07,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:07,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:07,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:08,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2022-07-19 10:17:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:08,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693765118] [2022-07-19 10:17:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:08,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693765118] [2022-07-19 10:17:08,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693765118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817376475] [2022-07-19 10:17:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:08,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:08,239 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) [2022-07-19 10:17:08,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:17:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:17:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:08,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:08,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817376475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:08,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:08,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:17:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873555241] [2022-07-19 10:17:08,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:17:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:17:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:17:08,391 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:17:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:08,461 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-19 10:17:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:17:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-19 10:17:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:08,466 INFO L225 Difference]: With dead ends: 53 [2022-07-19 10:17:08,466 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 10:17:08,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:17:08,469 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:08,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:17:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 10:17:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-07-19 10:17:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 10:17:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 10:17:08,477 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-07-19 10:17:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:08,478 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 10:17:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:17:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 10:17:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:17:08,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:08,479 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:08,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:08,704 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,SelfDestructingSolverStorable3 [2022-07-19 10:17:08,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2022-07-19 10:17:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414700349] [2022-07-19 10:17:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:08,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414700349] [2022-07-19 10:17:08,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414700349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:08,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121914090] [2022-07-19 10:17:08,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:08,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:08,932 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) [2022-07-19 10:17:08,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:17:08,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 10:17:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:09,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:09,158 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:09,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:09,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 10:17:09,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:09,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:09,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:09,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121914090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:09,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:09,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-19 10:17:09,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606866739] [2022-07-19 10:17:09,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:09,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 10:17:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 10:17:09,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-19 10:17:09,448 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 10:17:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:09,720 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-07-19 10:17:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:17:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2022-07-19 10:17:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:09,722 INFO L225 Difference]: With dead ends: 55 [2022-07-19 10:17:09,722 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 10:17:09,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-07-19 10:17:09,724 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:09,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-07-19 10:17:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 10:17:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-19 10:17:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-19 10:17:09,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2022-07-19 10:17:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:09,734 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-19 10:17:09,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 10:17:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-19 10:17:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:17:09,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:09,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:09,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:09,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2022-07-19 10:17:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:09,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819834307] [2022-07-19 10:17:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:10,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:10,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:10,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819834307] [2022-07-19 10:17:10,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819834307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:10,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116488892] [2022-07-19 10:17:10,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:10,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:10,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:10,109 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) [2022-07-19 10:17:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:17:10,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 10:17:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:10,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:10,463 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:17:10,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:17:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:10,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:10,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:17:10,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:17:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:10,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116488892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:10,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:10,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-19 10:17:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053638665] [2022-07-19 10:17:10,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 10:17:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 10:17:10,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:17:10,966 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:11,407 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-19 10:17:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:17:11,408 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2022-07-19 10:17:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:11,408 INFO L225 Difference]: With dead ends: 54 [2022-07-19 10:17:11,409 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 10:17:11,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 10:17:11,410 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:11,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 237 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-19 10:17:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 10:17:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-19 10:17:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-19 10:17:11,416 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2022-07-19 10:17:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:11,417 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-19 10:17:11,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-19 10:17:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:17:11,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:11,418 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:11,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:11,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2022-07-19 10:17:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:11,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365806121] [2022-07-19 10:17:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:17:11,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365806121] [2022-07-19 10:17:11,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365806121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576749311] [2022-07-19 10:17:11,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:17:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:11,820 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) [2022-07-19 10:17:11,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:17:11,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:17:11,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 10:17:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:12,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:12,170 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:12,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:12,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 10:17:12,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:12,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:12,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:17:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576749311] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:12,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2022-07-19 10:17:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042916371] [2022-07-19 10:17:12,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:17:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:17:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:17:12,506 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:12,785 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-19 10:17:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:17:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-07-19 10:17:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:12,787 INFO L225 Difference]: With dead ends: 60 [2022-07-19 10:17:12,787 INFO L226 Difference]: Without dead ends: 58 [2022-07-19 10:17:12,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 10:17:12,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:12,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 254 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 256 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-19 10:17:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-19 10:17:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-07-19 10:17:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-19 10:17:12,796 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2022-07-19 10:17:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:12,796 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-19 10:17:12,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-19 10:17:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:17:12,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:12,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:12,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:13,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:13,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2022-07-19 10:17:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057892915] [2022-07-19 10:17:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057892915] [2022-07-19 10:17:13,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057892915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567363760] [2022-07-19 10:17:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:17:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:13,228 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) [2022-07-19 10:17:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:17:13,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 10:17:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 10:17:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:13,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:13,427 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:13,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:13,481 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:13,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:13,576 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:13,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:13,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 10:17:13,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:13,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:13,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 10:17:13,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567363760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:13,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:13,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 22 [2022-07-19 10:17:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315290019] [2022-07-19 10:17:13,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 10:17:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 10:17:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-19 10:17:13,877 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-19 10:17:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:14,141 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-07-19 10:17:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 10:17:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 51 [2022-07-19 10:17:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:14,143 INFO L225 Difference]: With dead ends: 71 [2022-07-19 10:17:14,143 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 10:17:14,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:17:14,144 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:14,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 255 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-07-19 10:17:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 10:17:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-07-19 10:17:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-19 10:17:14,152 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2022-07-19 10:17:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:14,153 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-19 10:17:14,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-19 10:17:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-19 10:17:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:17:14,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:14,154 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:14,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:14,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2022-07-19 10:17:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308093365] [2022-07-19 10:17:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:14,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:17:14,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308093365] [2022-07-19 10:17:14,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308093365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293793541] [2022-07-19 10:17:14,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:17:14,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:14,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:14,618 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) [2022-07-19 10:17:14,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:17:14,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:17:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 10:17:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:14,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:17:14,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:17:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:14,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:14,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293793541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:15,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:15,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-07-19 10:17:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771035180] [2022-07-19 10:17:15,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:17:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:17:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-19 10:17:15,076 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 10:17:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:15,764 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-19 10:17:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:17:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2022-07-19 10:17:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:15,765 INFO L225 Difference]: With dead ends: 86 [2022-07-19 10:17:15,766 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 10:17:15,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 10:17:15,767 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:15,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 285 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:17:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 10:17:15,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2022-07-19 10:17:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-19 10:17:15,777 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2022-07-19 10:17:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:15,777 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-19 10:17:15,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 10:17:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-19 10:17:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:17:15,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:15,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:15,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 10:17:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:15,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2022-07-19 10:17:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203005109] [2022-07-19 10:17:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:16,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203005109] [2022-07-19 10:17:16,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203005109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178045232] [2022-07-19 10:17:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:17:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:16,182 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) [2022-07-19 10:17:16,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:17:16,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 10:17:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 10:17:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:16,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:16,428 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:16,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:16,513 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:16,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:16,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 10:17:16,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:16,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:16,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 10:17:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178045232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:16,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:16,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-07-19 10:17:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910038917] [2022-07-19 10:17:16,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:17:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:17:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:17:16,869 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-19 10:17:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:17,167 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-07-19 10:17:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:17:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-07-19 10:17:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:17,177 INFO L225 Difference]: With dead ends: 73 [2022-07-19 10:17:17,177 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 10:17:17,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 10:17:17,179 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:17,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-07-19 10:17:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 10:17:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-19 10:17:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-19 10:17:17,200 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2022-07-19 10:17:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:17,201 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-19 10:17:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-19 10:17:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-19 10:17:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:17:17,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:17,205 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:17,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:17,419 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,SelfDestructingSolverStorable9 [2022-07-19 10:17:17,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2022-07-19 10:17:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792556227] [2022-07-19 10:17:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:17:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792556227] [2022-07-19 10:17:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792556227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638421325] [2022-07-19 10:17:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:17:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:17,506 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) [2022-07-19 10:17:17,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:17:17,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 10:17:17,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:17:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:17:17,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:17:17,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638421325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:17,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:17,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 10:17:17,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51865104] [2022-07-19 10:17:17,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:17:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:17:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:17:17,728 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 10:17:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:17,842 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-19 10:17:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:17:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2022-07-19 10:17:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:17,844 INFO L225 Difference]: With dead ends: 89 [2022-07-19 10:17:17,844 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 10:17:17,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-19 10:17:17,845 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:17,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 10:17:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-07-19 10:17:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 10:17:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-19 10:17:17,852 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2022-07-19 10:17:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:17,852 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-19 10:17:17,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-19 10:17:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-19 10:17:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 10:17:17,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:17,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:17,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:18,063 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2022-07-19 10:17:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812245150] [2022-07-19 10:17:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812245150] [2022-07-19 10:17:18,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812245150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836640117] [2022-07-19 10:17:18,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:17:18,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:18,338 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) [2022-07-19 10:17:18,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:17:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 10:17:18,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:18,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:18,633 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:18,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:18,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 10:17:18,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:18,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836640117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:18,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:18,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2022-07-19 10:17:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040645782] [2022-07-19 10:17:18,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:17:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:17:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 10:17:18,875 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 10:17:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:19,479 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-07-19 10:17:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 10:17:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2022-07-19 10:17:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:19,480 INFO L225 Difference]: With dead ends: 84 [2022-07-19 10:17:19,480 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 10:17:19,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 10:17:19,482 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:19,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 303 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 528 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-07-19 10:17:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 10:17:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-07-19 10:17:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:17:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-19 10:17:19,489 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2022-07-19 10:17:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:19,490 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-19 10:17:19,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 10:17:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-19 10:17:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 10:17:19,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:19,491 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:19,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:19,691 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,SelfDestructingSolverStorable11 [2022-07-19 10:17:19,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2022-07-19 10:17:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454149194] [2022-07-19 10:17:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:19,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454149194] [2022-07-19 10:17:19,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454149194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:19,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205668682] [2022-07-19 10:17:19,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:19,916 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) [2022-07-19 10:17:19,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:17:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 10:17:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:20,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:20,438 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:17:20,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:17:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:20,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:20,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:17:20,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:17:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:21,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205668682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:21,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:21,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-07-19 10:17:21,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632415586] [2022-07-19 10:17:21,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 10:17:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 10:17:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 10:17:21,084 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-19 10:17:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:21,763 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-19 10:17:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 10:17:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2022-07-19 10:17:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:21,764 INFO L225 Difference]: With dead ends: 80 [2022-07-19 10:17:21,764 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 10:17:21,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 10:17:21,766 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:21,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 254 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-07-19 10:17:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 10:17:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-19 10:17:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:17:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-07-19 10:17:21,775 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 63 [2022-07-19 10:17:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:21,775 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-07-19 10:17:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-19 10:17:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-07-19 10:17:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 10:17:21,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:21,776 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:21,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:21,987 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,SelfDestructingSolverStorable12 [2022-07-19 10:17:21,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1918482698, now seen corresponding path program 9 times [2022-07-19 10:17:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523996989] [2022-07-19 10:17:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 10:17:22,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523996989] [2022-07-19 10:17:22,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523996989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:22,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196530135] [2022-07-19 10:17:22,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:17:22,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:22,348 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) [2022-07-19 10:17:22,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:17:22,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 10:17:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 10:17:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:22,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:22,614 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:22,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:22,693 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:22,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:22,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:17:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 10:17:22,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:22,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196530135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:22,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:22,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-07-19 10:17:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863865127] [2022-07-19 10:17:22,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 10:17:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 10:17:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 10:17:22,942 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-19 10:17:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:23,488 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-19 10:17:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 10:17:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2022-07-19 10:17:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:23,490 INFO L225 Difference]: With dead ends: 74 [2022-07-19 10:17:23,490 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 10:17:23,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 10:17:23,491 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:23,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-19 10:17:23,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 10:17:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-19 10:17:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 10:17:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-19 10:17:23,498 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 67 [2022-07-19 10:17:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:23,498 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-19 10:17:23,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-19 10:17:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-19 10:17:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 10:17:23,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:23,499 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:23,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:23,699 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,SelfDestructingSolverStorable13 [2022-07-19 10:17:23,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 10 times [2022-07-19 10:17:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524831253] [2022-07-19 10:17:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 10:17:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:23,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524831253] [2022-07-19 10:17:23,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524831253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:23,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727205030] [2022-07-19 10:17:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:17:23,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:23,986 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) [2022-07-19 10:17:24,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:17:24,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:17:24,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 10:17:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:24,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:24,333 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:24,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:24,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:17:24,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:24,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727205030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:24,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:24,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2022-07-19 10:17:24,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872158995] [2022-07-19 10:17:24,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:24,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 10:17:24,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:24,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 10:17:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:17:24,548 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:24,878 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-19 10:17:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:17:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 71 [2022-07-19 10:17:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:24,879 INFO L225 Difference]: With dead ends: 98 [2022-07-19 10:17:24,879 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 10:17:24,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 10:17:24,881 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:24,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 295 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 433 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-19 10:17:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 10:17:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-07-19 10:17:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 10:17:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-19 10:17:24,890 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2022-07-19 10:17:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:24,890 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-19 10:17:24,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 10:17:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-19 10:17:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 10:17:24,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:24,892 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:24,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:25,103 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,SelfDestructingSolverStorable14 [2022-07-19 10:17:25,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 11 times [2022-07-19 10:17:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762906569] [2022-07-19 10:17:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 10:17:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762906569] [2022-07-19 10:17:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762906569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131881993] [2022-07-19 10:17:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:17:25,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:25,364 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) [2022-07-19 10:17:25,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:17:25,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 10:17:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 10:17:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:25,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:25,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 10:17:25,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:25,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:25,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:25,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131881993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:25,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:25,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 24 [2022-07-19 10:17:25,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279983731] [2022-07-19 10:17:25,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:17:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:17:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:17:25,909 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 10:17:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:26,532 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-07-19 10:17:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 10:17:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 75 [2022-07-19 10:17:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:26,534 INFO L225 Difference]: With dead ends: 118 [2022-07-19 10:17:26,534 INFO L226 Difference]: Without dead ends: 116 [2022-07-19 10:17:26,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 10:17:26,535 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:26,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 440 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:17:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-19 10:17:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2022-07-19 10:17:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 10:17:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-19 10:17:26,545 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2022-07-19 10:17:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:26,546 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-19 10:17:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 10:17:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-19 10:17:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 10:17:26,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:26,547 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:26,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:26,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:26,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 12 times [2022-07-19 10:17:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:26,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023051270] [2022-07-19 10:17:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:26,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:26,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:27,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023051270] [2022-07-19 10:17:27,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023051270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824022363] [2022-07-19 10:17:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:17:27,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:27,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:27,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 10:17:27,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 10:17:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 10:17:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:27,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:27,411 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:27,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:27,494 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:27,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:27,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 10:17:27,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:27,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:27,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 10:17:27,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824022363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:27,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:27,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-19 10:17:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973437953] [2022-07-19 10:17:27,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 10:17:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 10:17:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 10:17:27,909 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:17:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:28,265 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-19 10:17:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:17:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) Word has length 79 [2022-07-19 10:17:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:28,266 INFO L225 Difference]: With dead ends: 100 [2022-07-19 10:17:28,266 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 10:17:28,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 10:17:28,267 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 603 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-07-19 10:17:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 10:17:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-07-19 10:17:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 10:17:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-19 10:17:28,279 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2022-07-19 10:17:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:28,279 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-19 10:17:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:17:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-19 10:17:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 10:17:28,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:28,280 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:28,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:28,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 10:17:28,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 13 times [2022-07-19 10:17:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:28,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476749872] [2022-07-19 10:17:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:28,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 10:17:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476749872] [2022-07-19 10:17:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476749872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408723725] [2022-07-19 10:17:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:17:28,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:28,604 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:28,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 10:17:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 10:17:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 10:17:28,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 10:17:28,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408723725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:28,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:28,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 10:17:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747047918] [2022-07-19 10:17:28,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 10:17:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 10:17:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:17:28,860 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 10:17:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:29,001 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-07-19 10:17:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:17:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2022-07-19 10:17:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:29,002 INFO L225 Difference]: With dead ends: 121 [2022-07-19 10:17:29,002 INFO L226 Difference]: Without dead ends: 93 [2022-07-19 10:17:29,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:17:29,003 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:29,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 232 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-19 10:17:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-07-19 10:17:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 10:17:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-07-19 10:17:29,014 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2022-07-19 10:17:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:29,014 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-07-19 10:17:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-19 10:17:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-07-19 10:17:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 10:17:29,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:29,015 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:29,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:29,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 10:17:29,228 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 14 times [2022-07-19 10:17:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:29,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457443975] [2022-07-19 10:17:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457443975] [2022-07-19 10:17:29,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457443975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165887659] [2022-07-19 10:17:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:29,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:29,504 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:29,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 10:17:29,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 10:17:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:29,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:32,028 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:32,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:32,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 10:17:32,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:32,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:32,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165887659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:32,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:32,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 38 [2022-07-19 10:17:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731657297] [2022-07-19 10:17:32,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 10:17:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 10:17:32,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1269, Unknown=1, NotChecked=0, Total=1406 [2022-07-19 10:17:32,567 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-19 10:17:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:33,122 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2022-07-19 10:17:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 10:17:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 83 [2022-07-19 10:17:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:33,123 INFO L225 Difference]: With dead ends: 113 [2022-07-19 10:17:33,123 INFO L226 Difference]: Without dead ends: 111 [2022-07-19 10:17:33,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=257, Invalid=2394, Unknown=1, NotChecked=0, Total=2652 [2022-07-19 10:17:33,124 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:33,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 436 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 719 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-07-19 10:17:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-19 10:17:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2022-07-19 10:17:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:17:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-07-19 10:17:33,134 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2022-07-19 10:17:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:33,134 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-07-19 10:17:33,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-19 10:17:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-07-19 10:17:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 10:17:33,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:33,135 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:33,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:33,336 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 15 times [2022-07-19 10:17:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236515318] [2022-07-19 10:17:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236515318] [2022-07-19 10:17:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236515318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493255893] [2022-07-19 10:17:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:17:33,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:33,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:33,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:33,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 10:17:33,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 10:17:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 10:17:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:33,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:34,342 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-19 10:17:34,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-19 10:17:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:34,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:34,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:34,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493255893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:34,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:17:34,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2022-07-19 10:17:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212297186] [2022-07-19 10:17:34,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 10:17:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 10:17:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 10:17:34,744 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-19 10:17:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:35,133 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-07-19 10:17:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:17:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 87 [2022-07-19 10:17:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:35,135 INFO L225 Difference]: With dead ends: 112 [2022-07-19 10:17:35,135 INFO L226 Difference]: Without dead ends: 110 [2022-07-19 10:17:35,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=2706, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 10:17:35,136 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:35,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 679 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-19 10:17:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-19 10:17:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-07-19 10:17:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:17:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-19 10:17:35,150 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2022-07-19 10:17:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:35,150 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-19 10:17:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-19 10:17:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-19 10:17:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 10:17:35,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:35,151 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:35,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:35,355 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 16 times [2022-07-19 10:17:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:35,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204736362] [2022-07-19 10:17:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204736362] [2022-07-19 10:17:35,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204736362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94961311] [2022-07-19 10:17:35,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:17:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:35,652 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:35,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 10:17:35,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:17:35,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 10:17:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:36,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:36,115 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:36,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:36,211 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:36,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:36,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 10:17:36,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:36,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:36,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-19 10:17:36,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94961311] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:36,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:36,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-07-19 10:17:36,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311729983] [2022-07-19 10:17:36,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:36,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 10:17:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 10:17:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:17:36,685 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-19 10:17:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:37,252 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-07-19 10:17:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 10:17:37,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 91 [2022-07-19 10:17:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:37,254 INFO L225 Difference]: With dead ends: 121 [2022-07-19 10:17:37,254 INFO L226 Difference]: Without dead ends: 119 [2022-07-19 10:17:37,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 173 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 10:17:37,255 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:37,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 629 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1101 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-07-19 10:17:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-19 10:17:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2022-07-19 10:17:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:17:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-19 10:17:37,269 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2022-07-19 10:17:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:37,270 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-19 10:17:37,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-19 10:17:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-19 10:17:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 10:17:37,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:37,271 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:37,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:37,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:37,483 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 17 times [2022-07-19 10:17:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626734627] [2022-07-19 10:17:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:17:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:37,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626734627] [2022-07-19 10:17:37,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626734627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:37,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895631233] [2022-07-19 10:17:37,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:17:37,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:37,624 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:37,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 10:17:37,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 10:17:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 10:17:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:17:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:17:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895631233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:37,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:37,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-19 10:17:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514967149] [2022-07-19 10:17:37,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:17:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:17:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:17:37,996 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 10:17:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:38,188 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-07-19 10:17:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 10:17:38,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2022-07-19 10:17:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:38,190 INFO L225 Difference]: With dead ends: 137 [2022-07-19 10:17:38,190 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 10:17:38,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 10:17:38,191 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:38,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 183 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 10:17:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2022-07-19 10:17:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 10:17:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-19 10:17:38,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2022-07-19 10:17:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:38,209 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-19 10:17:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-19 10:17:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-19 10:17:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 10:17:38,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:38,210 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:38,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:38,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 10:17:38,431 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 18 times [2022-07-19 10:17:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:38,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769822979] [2022-07-19 10:17:38,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:38,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769822979] [2022-07-19 10:17:38,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769822979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:38,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774886775] [2022-07-19 10:17:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:17:38,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:38,764 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:38,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 10:17:38,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-19 10:17:38,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 10:17:38,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:39,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:39,382 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:39,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:39,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-19 10:17:39,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:39,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:39,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774886775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:39,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:39,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-19 10:17:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645602090] [2022-07-19 10:17:39,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 10:17:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 10:17:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 10:17:39,935 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-19 10:17:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:40,510 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2022-07-19 10:17:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 10:17:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 95 [2022-07-19 10:17:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:40,511 INFO L225 Difference]: With dead ends: 129 [2022-07-19 10:17:40,511 INFO L226 Difference]: Without dead ends: 127 [2022-07-19 10:17:40,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 10:17:40,512 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:40,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 543 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 994 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-07-19 10:17:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-19 10:17:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-07-19 10:17:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:17:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-07-19 10:17:40,528 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2022-07-19 10:17:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:40,529 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-07-19 10:17:40,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-19 10:17:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-07-19 10:17:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 10:17:40,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:40,530 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:40,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-19 10:17:40,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 10:17:40,735 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 19 times [2022-07-19 10:17:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492104220] [2022-07-19 10:17:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:41,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492104220] [2022-07-19 10:17:41,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492104220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967438618] [2022-07-19 10:17:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:17:41,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:41,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:41,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 10:17:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 10:17:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:41,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:17:41,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:41,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:41,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:41,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:42,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967438618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:42,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:42,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2022-07-19 10:17:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441912688] [2022-07-19 10:17:42,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:42,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 10:17:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 10:17:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 10:17:42,060 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-19 10:17:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:43,051 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-07-19 10:17:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 10:17:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 99 [2022-07-19 10:17:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:43,053 INFO L225 Difference]: With dead ends: 150 [2022-07-19 10:17:43,053 INFO L226 Difference]: Without dead ends: 148 [2022-07-19 10:17:43,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 10:17:43,055 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:43,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1278 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-07-19 10:17:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-19 10:17:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2022-07-19 10:17:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:17:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-19 10:17:43,069 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2022-07-19 10:17:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:43,070 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-19 10:17:43,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-19 10:17:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-19 10:17:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:17:43,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:43,071 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:43,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-19 10:17:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:43,273 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 20 times [2022-07-19 10:17:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124121872] [2022-07-19 10:17:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124121872] [2022-07-19 10:17:43,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124121872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660742382] [2022-07-19 10:17:43,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:43,584 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:43,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 10:17:43,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:43,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 10:17:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:43,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:44,004 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:44,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:44,087 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:44,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:44,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 10:17:44,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:44,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:44,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-19 10:17:44,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660742382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:44,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:44,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-07-19 10:17:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650496488] [2022-07-19 10:17:44,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 10:17:44,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 10:17:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 10:17:44,606 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-19 10:17:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:45,208 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2022-07-19 10:17:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 10:17:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) Word has length 103 [2022-07-19 10:17:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:45,209 INFO L225 Difference]: With dead ends: 137 [2022-07-19 10:17:45,209 INFO L226 Difference]: Without dead ends: 135 [2022-07-19 10:17:45,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 197 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 10:17:45,210 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:45,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 492 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1125 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-07-19 10:17:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-19 10:17:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-07-19 10:17:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:17:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-19 10:17:45,224 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2022-07-19 10:17:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:45,224 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-19 10:17:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-19 10:17:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-19 10:17:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:17:45,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:45,225 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:45,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:45,430 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 21 times [2022-07-19 10:17:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928009246] [2022-07-19 10:17:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 10:17:45,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928009246] [2022-07-19 10:17:45,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928009246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805100834] [2022-07-19 10:17:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:17:45,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:45,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:45,602 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:45,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 10:17:45,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 10:17:45,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:17:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 10:17:46,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 10:17:46,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805100834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:46,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:46,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-19 10:17:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609307708] [2022-07-19 10:17:46,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:46,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:17:46,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:17:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:17:46,136 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 10:17:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:46,339 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-07-19 10:17:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:17:46,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2022-07-19 10:17:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:46,340 INFO L225 Difference]: With dead ends: 153 [2022-07-19 10:17:46,341 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 10:17:46,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:17:46,341 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:46,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 219 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 10:17:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-07-19 10:17:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-19 10:17:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-07-19 10:17:46,360 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2022-07-19 10:17:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:46,361 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-07-19 10:17:46,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-19 10:17:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-07-19 10:17:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 10:17:46,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:46,362 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:46,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:46,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 10:17:46,563 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:46,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 22 times [2022-07-19 10:17:46,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834436496] [2022-07-19 10:17:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834436496] [2022-07-19 10:17:46,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834436496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:46,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19668169] [2022-07-19 10:17:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:17:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:46,964 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:46,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 10:17:47,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:17:47,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 10:17:47,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:47,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:49,530 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:49,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:49,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 10:17:49,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:49,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:49,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:50,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19668169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:50,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:50,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 46 [2022-07-19 10:17:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353823005] [2022-07-19 10:17:50,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 10:17:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 10:17:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1901, Unknown=1, NotChecked=0, Total=2070 [2022-07-19 10:17:50,159 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-19 10:17:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:50,862 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-07-19 10:17:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 10:17:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) Word has length 107 [2022-07-19 10:17:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:50,864 INFO L225 Difference]: With dead ends: 140 [2022-07-19 10:17:50,864 INFO L226 Difference]: Without dead ends: 138 [2022-07-19 10:17:50,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=276, Invalid=3145, Unknown=1, NotChecked=0, Total=3422 [2022-07-19 10:17:50,865 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:50,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 737 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1335 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-07-19 10:17:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-19 10:17:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2022-07-19 10:17:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 10:17:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-07-19 10:17:50,885 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2022-07-19 10:17:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:50,885 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-07-19 10:17:50,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-19 10:17:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-07-19 10:17:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 10:17:50,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:50,887 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:50,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-19 10:17:51,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 10:17:51,094 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 23 times [2022-07-19 10:17:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86778101] [2022-07-19 10:17:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:51,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:51,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86778101] [2022-07-19 10:17:51,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86778101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889962342] [2022-07-19 10:17:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:17:51,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:51,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:51,432 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:51,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 10:17:51,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-19 10:17:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 10:17:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:51,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:17:52,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:52,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:52,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:52,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889962342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:52,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:52,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 44 [2022-07-19 10:17:52,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33860720] [2022-07-19 10:17:52,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:52,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 10:17:52,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:52,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 10:17:52,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 10:17:52,431 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 10:17:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:53,655 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-07-19 10:17:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 10:17:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-07-19 10:17:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:53,656 INFO L225 Difference]: With dead ends: 166 [2022-07-19 10:17:53,656 INFO L226 Difference]: Without dead ends: 164 [2022-07-19 10:17:53,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2022-07-19 10:17:53,657 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 236 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:53,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 839 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:17:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-19 10:17:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2022-07-19 10:17:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 10:17:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-19 10:17:53,674 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2022-07-19 10:17:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:53,675 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-19 10:17:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-19 10:17:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-19 10:17:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-19 10:17:53,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:53,676 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:53,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:53,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 10:17:53,899 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 24 times [2022-07-19 10:17:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:53,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002201071] [2022-07-19 10:17:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:53,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:17:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:17:54,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002201071] [2022-07-19 10:17:54,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002201071] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558679125] [2022-07-19 10:17:54,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:17:54,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:54,256 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:54,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 10:17:54,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-19 10:17:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 10:17:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:54,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:54,841 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:54,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:54,936 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:54,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:17:55,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-19 10:17:55,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:55,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:55,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-19 10:17:55,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558679125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:55,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:55,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-07-19 10:17:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601965185] [2022-07-19 10:17:55,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 10:17:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 10:17:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 10:17:55,501 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-19 10:17:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:56,299 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2022-07-19 10:17:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 10:17:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) Word has length 115 [2022-07-19 10:17:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:56,300 INFO L225 Difference]: With dead ends: 153 [2022-07-19 10:17:56,300 INFO L226 Difference]: Without dead ends: 151 [2022-07-19 10:17:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 10:17:56,301 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:56,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 660 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1323 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-07-19 10:17:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-19 10:17:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2022-07-19 10:17:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 10:17:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-19 10:17:56,325 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 115 [2022-07-19 10:17:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:56,325 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-19 10:17:56,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-19 10:17:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-19 10:17:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-19 10:17:56,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:56,327 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:56,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:56,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 10:17:56,550 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 25 times [2022-07-19 10:17:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:56,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783116814] [2022-07-19 10:17:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:17:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783116814] [2022-07-19 10:17:56,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783116814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150752049] [2022-07-19 10:17:56,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:17:56,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:56,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:56,740 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:56,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 10:17:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 10:17:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:17:57,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:17:57,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150752049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:57,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:57,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-19 10:17:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983582047] [2022-07-19 10:17:57,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:57,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 10:17:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 10:17:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-19 10:17:57,220 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 10:17:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:57,420 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-07-19 10:17:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:17:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2022-07-19 10:17:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:57,421 INFO L225 Difference]: With dead ends: 169 [2022-07-19 10:17:57,421 INFO L226 Difference]: Without dead ends: 129 [2022-07-19 10:17:57,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 10:17:57,424 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:57,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:17:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-19 10:17:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2022-07-19 10:17:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 10:17:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-19 10:17:57,439 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 115 [2022-07-19 10:17:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:57,439 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-19 10:17:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-19 10:17:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-19 10:17:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-19 10:17:57,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:57,440 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:57,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 10:17:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:57,641 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 26 times [2022-07-19 10:17:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:57,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986071934] [2022-07-19 10:17:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:17:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:17:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:17:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:17:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:17:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:17:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:17:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:17:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:17:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:17:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:17:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:17:58,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986071934] [2022-07-19 10:17:58,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986071934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704883111] [2022-07-19 10:17:58,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:58,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:58,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:58,020 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:58,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 10:17:58,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 10:17:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:58,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:17:58,699 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:17:58,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:17:58,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:17:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 10:17:58,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:59,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:17:59,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:17:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:17:59,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704883111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:59,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:59,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 48 [2022-07-19 10:17:59,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579943807] [2022-07-19 10:17:59,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:59,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 10:17:59,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 10:17:59,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 10:17:59,296 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-19 10:18:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:00,175 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2022-07-19 10:18:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 10:18:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 119 [2022-07-19 10:18:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:00,176 INFO L225 Difference]: With dead ends: 161 [2022-07-19 10:18:00,177 INFO L226 Difference]: Without dead ends: 159 [2022-07-19 10:18:00,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 229 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=3842, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 10:18:00,178 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:00,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1124 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1846 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-07-19 10:18:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-19 10:18:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2022-07-19 10:18:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 10:18:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-07-19 10:18:00,203 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 119 [2022-07-19 10:18:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:00,204 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-07-19 10:18:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-19 10:18:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-07-19 10:18:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-19 10:18:00,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:00,205 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:00,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-19 10:18:00,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:00,415 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 27 times [2022-07-19 10:18:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800699134] [2022-07-19 10:18:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:18:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800699134] [2022-07-19 10:18:00,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800699134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265693753] [2022-07-19 10:18:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:18:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:00,872 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:00,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 10:18:01,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-19 10:18:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 10:18:01,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:01,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:02,111 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:18:02,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:18:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 150 proven. 185 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:18:02,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:02,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:18:02,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:18:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 142 proven. 193 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:18:03,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265693753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:03,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:03,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-07-19 10:18:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908084916] [2022-07-19 10:18:03,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-19 10:18:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-19 10:18:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-07-19 10:18:03,380 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-19 10:18:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:05,243 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-07-19 10:18:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 10:18:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 123 [2022-07-19 10:18:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:05,244 INFO L225 Difference]: With dead ends: 160 [2022-07-19 10:18:05,244 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 10:18:05,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1517, Invalid=13489, Unknown=0, NotChecked=0, Total=15006 [2022-07-19 10:18:05,246 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:05,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 616 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 779 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-07-19 10:18:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 10:18:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-19 10:18:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 10:18:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-07-19 10:18:05,265 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 123 [2022-07-19 10:18:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:05,266 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-07-19 10:18:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-19 10:18:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-07-19 10:18:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 10:18:05,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:05,266 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:05,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-19 10:18:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 10:18:05,467 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 28 times [2022-07-19 10:18:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659356685] [2022-07-19 10:18:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:05,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659356685] [2022-07-19 10:18:05,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659356685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:05,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732907121] [2022-07-19 10:18:05,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:18:05,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:05,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:05,824 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:05,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 10:18:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:18:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 10:18:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:06,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:06,401 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:06,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:06,498 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:06,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:06,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 98 proven. 318 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-19 10:18:06,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:06,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:06,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 320 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-07-19 10:18:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732907121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:07,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:07,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-07-19 10:18:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957588114] [2022-07-19 10:18:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 10:18:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 10:18:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 10:18:07,132 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-19 10:18:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:08,020 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-07-19 10:18:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 10:18:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) Word has length 127 [2022-07-19 10:18:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:08,021 INFO L225 Difference]: With dead ends: 134 [2022-07-19 10:18:08,021 INFO L226 Difference]: Without dead ends: 132 [2022-07-19 10:18:08,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 244 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=3966, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 10:18:08,023 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 903 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1935 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-07-19 10:18:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-19 10:18:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-19 10:18:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 10:18:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-07-19 10:18:08,045 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 127 [2022-07-19 10:18:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:08,045 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-07-19 10:18:08,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-19 10:18:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-07-19 10:18:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 10:18:08,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:08,046 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:08,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:08,246 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 29 times [2022-07-19 10:18:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:08,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009676040] [2022-07-19 10:18:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:08,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009676040] [2022-07-19 10:18:08,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009676040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433296880] [2022-07-19 10:18:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:18:08,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:08,639 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:08,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 10:18:08,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-19 10:18:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:08,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-19 10:18:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:09,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:11,300 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:18:11,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:18:11,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 68 proven. 348 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-19 10:18:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:11,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:11,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433296880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:11,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 52 [2022-07-19 10:18:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875457008] [2022-07-19 10:18:11,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 10:18:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 10:18:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2460, Unknown=1, NotChecked=0, Total=2652 [2022-07-19 10:18:11,950 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-19 10:18:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:12,755 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-07-19 10:18:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 10:18:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 131 [2022-07-19 10:18:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:12,756 INFO L225 Difference]: With dead ends: 172 [2022-07-19 10:18:12,756 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 10:18:12,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 260 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=313, Invalid=4108, Unknown=1, NotChecked=0, Total=4422 [2022-07-19 10:18:12,757 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:12,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 663 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1646 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-07-19 10:18:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 10:18:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-07-19 10:18:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 10:18:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-07-19 10:18:12,783 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2022-07-19 10:18:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:12,783 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-07-19 10:18:12,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-19 10:18:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-07-19 10:18:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 10:18:12,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:12,784 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:12,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-19 10:18:13,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:13,008 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 30 times [2022-07-19 10:18:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685711225] [2022-07-19 10:18:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685711225] [2022-07-19 10:18:13,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685711225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669619861] [2022-07-19 10:18:13,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:18:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:13,400 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:13,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 10:18:13,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-19 10:18:13,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 10:18:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:14,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:14,709 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:18:14,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:18:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 186 proven. 226 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:14,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:15,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-19 10:18:15,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2022-07-19 10:18:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 93 proven. 319 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669619861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:16,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:16,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 80 [2022-07-19 10:18:16,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833183832] [2022-07-19 10:18:16,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:16,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-19 10:18:16,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:16,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-19 10:18:16,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=5668, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 10:18:16,139 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:18:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:18,307 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-07-19 10:18:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 10:18:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 135 [2022-07-19 10:18:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:18,310 INFO L225 Difference]: With dead ends: 176 [2022-07-19 10:18:18,310 INFO L226 Difference]: Without dead ends: 132 [2022-07-19 10:18:18,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1737, Invalid=15819, Unknown=0, NotChecked=0, Total=17556 [2022-07-19 10:18:18,312 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:18,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1072 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1070 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-07-19 10:18:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-19 10:18:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-19 10:18:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 10:18:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-07-19 10:18:18,339 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 135 [2022-07-19 10:18:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:18,339 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-07-19 10:18:18,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:18:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-07-19 10:18:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-19 10:18:18,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:18,341 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:18,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-19 10:18:18,555 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1501516640, now seen corresponding path program 31 times [2022-07-19 10:18:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271763289] [2022-07-19 10:18:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 395 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271763289] [2022-07-19 10:18:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271763289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497981757] [2022-07-19 10:18:18,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:18:18,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:18,968 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 10:18:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 10:18:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:19,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:19,551 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:19,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:19,646 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:19,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:19,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 109 proven. 392 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-07-19 10:18:19,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:20,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:20,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 394 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-19 10:18:20,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497981757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:20,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:20,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-07-19 10:18:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393808568] [2022-07-19 10:18:20,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 10:18:20,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:20,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 10:18:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 10:18:20,386 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-19 10:18:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:21,319 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-07-19 10:18:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 10:18:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) Word has length 139 [2022-07-19 10:18:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:21,321 INFO L225 Difference]: With dead ends: 141 [2022-07-19 10:18:21,321 INFO L226 Difference]: Without dead ends: 139 [2022-07-19 10:18:21,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 276 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=4112, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 10:18:21,322 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:21,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1004 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1918 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-07-19 10:18:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-19 10:18:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-07-19 10:18:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-19 10:18:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-07-19 10:18:21,350 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 139 [2022-07-19 10:18:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:21,351 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-07-19 10:18:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-19 10:18:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-07-19 10:18:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 10:18:21,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:21,352 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:21,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:21,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-19 10:18:21,576 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 32 times [2022-07-19 10:18:21,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:21,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215854608] [2022-07-19 10:18:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:22,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215854608] [2022-07-19 10:18:22,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215854608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320605616] [2022-07-19 10:18:22,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:18:22,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:22,068 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 10:18:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:18:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:22,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 10:18:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:22,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:24,810 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:18:24,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:18:25,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 10:18:25,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:25,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:25,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:25,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320605616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:25,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:25,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 56 [2022-07-19 10:18:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199115801] [2022-07-19 10:18:25,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 10:18:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 10:18:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2872, Unknown=1, NotChecked=0, Total=3080 [2022-07-19 10:18:25,548 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-19 10:18:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:26,358 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-07-19 10:18:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 10:18:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 143 [2022-07-19 10:18:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:26,359 INFO L225 Difference]: With dead ends: 188 [2022-07-19 10:18:26,359 INFO L226 Difference]: Without dead ends: 186 [2022-07-19 10:18:26,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 285 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=332, Invalid=4779, Unknown=1, NotChecked=0, Total=5112 [2022-07-19 10:18:26,360 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 110 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:26,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1147 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1693 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2022-07-19 10:18:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-19 10:18:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-07-19 10:18:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 10:18:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-07-19 10:18:26,386 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 143 [2022-07-19 10:18:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:26,386 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-07-19 10:18:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-19 10:18:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-07-19 10:18:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-19 10:18:26,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:26,388 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:26,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:26,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-19 10:18:26,603 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1610023500, now seen corresponding path program 33 times [2022-07-19 10:18:26,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:26,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858413528] [2022-07-19 10:18:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858413528] [2022-07-19 10:18:27,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858413528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289089454] [2022-07-19 10:18:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:18:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:27,075 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:27,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 10:18:27,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-19 10:18:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 10:18:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:27,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:28,592 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:18:28,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:18:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 226 proven. 271 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:29,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:18:29,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:18:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 216 proven. 281 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:30,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289089454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:30,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:30,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 86 [2022-07-19 10:18:30,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756983658] [2022-07-19 10:18:30,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:30,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-19 10:18:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-19 10:18:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=6541, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 10:18:30,180 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-19 10:18:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:32,623 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-07-19 10:18:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 10:18:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) Word has length 147 [2022-07-19 10:18:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:32,624 INFO L225 Difference]: With dead ends: 192 [2022-07-19 10:18:32,624 INFO L226 Difference]: Without dead ends: 144 [2022-07-19 10:18:32,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5628 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2016, Invalid=18576, Unknown=0, NotChecked=0, Total=20592 [2022-07-19 10:18:32,626 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:32,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1154 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1089 Invalid, 0 Unknown, 275 Unchecked, 0.4s Time] [2022-07-19 10:18:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-19 10:18:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-19 10:18:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 10:18:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-07-19 10:18:32,649 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 147 [2022-07-19 10:18:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:32,649 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-07-19 10:18:32,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-19 10:18:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-07-19 10:18:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-19 10:18:32,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:32,650 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:32,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-19 10:18:32,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:32,851 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:32,851 INFO L85 PathProgramCache]: Analyzing trace with hash 799601049, now seen corresponding path program 34 times [2022-07-19 10:18:32,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:32,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393219274] [2022-07-19 10:18:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:32,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:18:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 477 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-19 10:18:33,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:33,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393219274] [2022-07-19 10:18:33,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393219274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:33,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637445658] [2022-07-19 10:18:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:18:33,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:33,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:33,344 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 10:18:33,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:18:33,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 10:18:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:33,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:34,080 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:34,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:34,197 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:34,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:34,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-07-19 10:18:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:34,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:34,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 476 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-19 10:18:34,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637445658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:34,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:34,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-07-19 10:18:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354251050] [2022-07-19 10:18:34,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-19 10:18:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-19 10:18:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 10:18:34,983 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-19 10:18:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:36,107 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-07-19 10:18:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 10:18:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) Word has length 151 [2022-07-19 10:18:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:36,108 INFO L225 Difference]: With dead ends: 158 [2022-07-19 10:18:36,108 INFO L226 Difference]: Without dead ends: 156 [2022-07-19 10:18:36,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 292 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=372, Invalid=5328, Unknown=0, NotChecked=0, Total=5700 [2022-07-19 10:18:36,110 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 109 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:36,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1343 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2425 Invalid, 0 Unknown, 47 Unchecked, 0.8s Time] [2022-07-19 10:18:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-19 10:18:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-07-19 10:18:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 10:18:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-07-19 10:18:36,148 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 151 [2022-07-19 10:18:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:36,149 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-07-19 10:18:36,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-19 10:18:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-07-19 10:18:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-19 10:18:36,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:36,150 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:36,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 10:18:36,375 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1897314831, now seen corresponding path program 35 times [2022-07-19 10:18:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859257622] [2022-07-19 10:18:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:18:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-19 10:18:36,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:36,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859257622] [2022-07-19 10:18:36,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859257622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:36,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902324281] [2022-07-19 10:18:36,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:18:36,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:36,832 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:36,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-19 10:18:37,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-19 10:18:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 10:18:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:37,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:37,688 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:18:37,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:18:38,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:38,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:38,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:18:38,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:18:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-19 10:18:38,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902324281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:38,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:38,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 60 [2022-07-19 10:18:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821579414] [2022-07-19 10:18:38,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:38,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-19 10:18:38,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-19 10:18:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2022-07-19 10:18:38,556 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-19 10:18:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:39,682 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2022-07-19 10:18:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 10:18:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 155 [2022-07-19 10:18:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:39,683 INFO L225 Difference]: With dead ends: 209 [2022-07-19 10:18:39,683 INFO L226 Difference]: Without dead ends: 207 [2022-07-19 10:18:39,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=5930, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 10:18:39,684 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:39,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1327 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2425 Invalid, 0 Unknown, 185 Unchecked, 0.8s Time] [2022-07-19 10:18:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-19 10:18:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-07-19 10:18:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 10:18:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-07-19 10:18:39,710 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 155 [2022-07-19 10:18:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:39,711 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-07-19 10:18:39,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-19 10:18:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-07-19 10:18:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-19 10:18:39,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:39,712 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:39,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-19 10:18:39,935 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1021269893, now seen corresponding path program 36 times [2022-07-19 10:18:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396063067] [2022-07-19 10:18:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:18:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-19 10:18:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396063067] [2022-07-19 10:18:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396063067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836872354] [2022-07-19 10:18:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:18:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:40,764 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:40,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-19 10:18:41,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-19 10:18:41,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 10:18:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:41,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:42,918 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 12))) is different from true [2022-07-19 10:18:48,162 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 10:18:48,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-19 10:18:49,120 INFO L356 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2022-07-19 10:18:49,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2022-07-19 10:18:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 319 proven. 317 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 10:18:49,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:52,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836872354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:52,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:18:52,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 69 [2022-07-19 10:18:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836319641] [2022-07-19 10:18:52,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:52,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 10:18:52,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 10:18:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6456, Unknown=5, NotChecked=166, Total=7310 [2022-07-19 10:18:52,866 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-19 10:18:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:57,774 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-07-19 10:18:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-19 10:18:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) Word has length 159 [2022-07-19 10:18:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:57,775 INFO L225 Difference]: With dead ends: 225 [2022-07-19 10:18:57,775 INFO L226 Difference]: Without dead ends: 173 [2022-07-19 10:18:57,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9447 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2493, Invalid=27262, Unknown=5, NotChecked=342, Total=30102 [2022-07-19 10:18:57,778 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 255 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:57,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 2053 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2353 Invalid, 0 Unknown, 442 Unchecked, 1.0s Time] [2022-07-19 10:18:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-19 10:18:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-07-19 10:18:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 10:18:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-07-19 10:18:57,806 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 159 [2022-07-19 10:18:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:57,806 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-07-19 10:18:57,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-19 10:18:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-07-19 10:18:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-19 10:18:57,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:57,807 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:57,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-19 10:18:58,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:58,008 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -827326766, now seen corresponding path program 37 times [2022-07-19 10:18:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068383644] [2022-07-19 10:18:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:18:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:18:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:18:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:18:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:18:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:18:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:18:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:18:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:18:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:18:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:18:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:18:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:18:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:18:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:18:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 567 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 10:18:58,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068383644] [2022-07-19 10:18:58,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068383644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:58,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278016283] [2022-07-19 10:18:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:18:58,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:58,605 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:58,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-19 10:18:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 10:18:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:59,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:18:59,415 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:59,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:59,522 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:59,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:18:59,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:18:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 131 proven. 564 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-19 10:18:59,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:00,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:00,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-19 10:19:00,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278016283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:00,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:00,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-07-19 10:19:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847771853] [2022-07-19 10:19:00,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-19 10:19:00,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-19 10:19:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 10:19:00,411 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-19 10:19:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:01,890 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-19 10:19:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 10:19:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) Word has length 163 [2022-07-19 10:19:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:01,892 INFO L225 Difference]: With dead ends: 170 [2022-07-19 10:19:01,892 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 10:19:01,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 317 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=6084, Unknown=0, NotChecked=0, Total=6480 [2022-07-19 10:19:01,893 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 127 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:01,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1728 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3296 Invalid, 0 Unknown, 88 Unchecked, 1.2s Time] [2022-07-19 10:19:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 10:19:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-07-19 10:19:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 10:19:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-07-19 10:19:01,933 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 163 [2022-07-19 10:19:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:01,933 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-07-19 10:19:01,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-19 10:19:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-07-19 10:19:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-19 10:19:01,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:01,934 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:01,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-19 10:19:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-19 10:19:02,135 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash -286096696, now seen corresponding path program 38 times [2022-07-19 10:19:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662897839] [2022-07-19 10:19:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 39 proven. 606 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 10:19:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:02,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662897839] [2022-07-19 10:19:02,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662897839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:02,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217758249] [2022-07-19 10:19:02,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:02,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:02,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:02,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-19 10:19:03,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-19 10:19:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:03,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:03,681 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:03,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:04,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:19:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 89 proven. 606 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-19 10:19:04,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:04,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217758249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:04,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:04,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 66 [2022-07-19 10:19:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219818155] [2022-07-19 10:19:04,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 10:19:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 10:19:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=5806, Unknown=0, NotChecked=0, Total=6162 [2022-07-19 10:19:04,621 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-19 10:19:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:07,054 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-07-19 10:19:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 10:19:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 167 [2022-07-19 10:19:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:07,060 INFO L225 Difference]: With dead ends: 233 [2022-07-19 10:19:07,060 INFO L226 Difference]: Without dead ends: 231 [2022-07-19 10:19:07,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 10:19:07,062 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 225 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:07,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1654 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3704 Invalid, 0 Unknown, 82 Unchecked, 1.3s Time] [2022-07-19 10:19:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-19 10:19:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2022-07-19 10:19:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 10:19:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-07-19 10:19:07,106 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 167 [2022-07-19 10:19:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:07,106 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-07-19 10:19:07,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-19 10:19:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-07-19 10:19:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-19 10:19:07,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:07,108 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:07,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:07,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:07,309 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1640373182, now seen corresponding path program 39 times [2022-07-19 10:19:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:07,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239336290] [2022-07-19 10:19:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 10:19:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239336290] [2022-07-19 10:19:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239336290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849305416] [2022-07-19 10:19:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:19:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:07,968 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-19 10:19:08,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-19 10:19:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-19 10:19:08,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:08,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:09,944 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-19 10:19:09,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-19 10:19:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 10:19:09,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:10,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:10,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:10,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849305416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:10,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:10,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 66 [2022-07-19 10:19:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055914640] [2022-07-19 10:19:10,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 10:19:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 10:19:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=6395, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 10:19:10,886 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-19 10:19:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:11,634 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-07-19 10:19:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 10:19:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) Word has length 171 [2022-07-19 10:19:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:11,635 INFO L225 Difference]: With dead ends: 223 [2022-07-19 10:19:11,635 INFO L226 Difference]: Without dead ends: 221 [2022-07-19 10:19:11,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=609, Invalid=6873, Unknown=0, NotChecked=0, Total=7482 [2022-07-19 10:19:11,636 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:11,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1124 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1795 Invalid, 0 Unknown, 222 Unchecked, 0.6s Time] [2022-07-19 10:19:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-19 10:19:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2022-07-19 10:19:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 10:19:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-19 10:19:11,684 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2022-07-19 10:19:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:11,684 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-19 10:19:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-19 10:19:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-19 10:19:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-19 10:19:11,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:11,685 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:11,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:11,901 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 714324747, now seen corresponding path program 40 times [2022-07-19 10:19:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:11,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82044560] [2022-07-19 10:19:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 39 proven. 665 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:12,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82044560] [2022-07-19 10:19:12,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82044560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455162156] [2022-07-19 10:19:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:19:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:12,656 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:12,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-19 10:19:12,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:19:12,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-19 10:19:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:13,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:13,455 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:13,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:13,555 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:13,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:14,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 10:19:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 142 proven. 662 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-19 10:19:14,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455162156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:14,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 10:19:14,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 67 [2022-07-19 10:19:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990122875] [2022-07-19 10:19:14,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:14,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-19 10:19:14,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-19 10:19:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5953, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 10:19:14,506 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-19 10:19:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:16,880 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2022-07-19 10:19:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 10:19:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 175 [2022-07-19 10:19:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:16,881 INFO L225 Difference]: With dead ends: 233 [2022-07-19 10:19:16,881 INFO L226 Difference]: Without dead ends: 231 [2022-07-19 10:19:16,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=731, Invalid=12609, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 10:19:16,882 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 177 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:16,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1533 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3677 Invalid, 0 Unknown, 78 Unchecked, 1.3s Time] [2022-07-19 10:19:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-19 10:19:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-07-19 10:19:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 10:19:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-19 10:19:16,922 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 175 [2022-07-19 10:19:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:16,922 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-19 10:19:16,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-19 10:19:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-19 10:19:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-19 10:19:16,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:16,923 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:16,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:17,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-19 10:19:17,123 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1634186828, now seen corresponding path program 41 times [2022-07-19 10:19:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:17,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883822923] [2022-07-19 10:19:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-19 10:19:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883822923] [2022-07-19 10:19:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883822923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521784505] [2022-07-19 10:19:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:19:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:17,436 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:17,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-19 10:19:17,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-19 10:19:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 10:19:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-19 10:19:18,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-19 10:19:18,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521784505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:18,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:18,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-19 10:19:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346428949] [2022-07-19 10:19:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 10:19:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 10:19:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 10:19:18,284 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-19 10:19:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:18,651 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-07-19 10:19:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 10:19:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 175 [2022-07-19 10:19:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:18,652 INFO L225 Difference]: With dead ends: 249 [2022-07-19 10:19:18,652 INFO L226 Difference]: Without dead ends: 189 [2022-07-19 10:19:18,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 10:19:18,653 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 324 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:18,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 353 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:19:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-19 10:19:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2022-07-19 10:19:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 10:19:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-07-19 10:19:18,688 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 175 [2022-07-19 10:19:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:18,688 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-07-19 10:19:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-19 10:19:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-07-19 10:19:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-19 10:19:18,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:18,689 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:18,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:18,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-19 10:19:18,890 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:18,890 INFO L85 PathProgramCache]: Analyzing trace with hash -38045055, now seen corresponding path program 42 times [2022-07-19 10:19:18,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:18,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737703917] [2022-07-19 10:19:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737703917] [2022-07-19 10:19:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737703917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902237316] [2022-07-19 10:19:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:19:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:19,488 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:19,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-19 10:19:19,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-19 10:19:19,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-19 10:19:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:20,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:22,783 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:19:22,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:19:23,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 96 proven. 708 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-19 10:19:23,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:23,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:23,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:23,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902237316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:23,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:23,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 68 [2022-07-19 10:19:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437774473] [2022-07-19 10:19:23,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:23,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 10:19:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 10:19:23,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4300, Unknown=1, NotChecked=0, Total=4556 [2022-07-19 10:19:23,793 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-19 10:19:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:25,423 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-07-19 10:19:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-19 10:19:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 179 [2022-07-19 10:19:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:25,424 INFO L225 Difference]: With dead ends: 241 [2022-07-19 10:19:25,424 INFO L226 Difference]: Without dead ends: 239 [2022-07-19 10:19:25,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 349 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=438, Invalid=7571, Unknown=1, NotChecked=0, Total=8010 [2022-07-19 10:19:25,425 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 107 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:25,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1842 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3492 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-07-19 10:19:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-19 10:19:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 185. [2022-07-19 10:19:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 10:19:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-07-19 10:19:25,469 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 179 [2022-07-19 10:19:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:25,469 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-07-19 10:19:25,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-19 10:19:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-07-19 10:19:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 10:19:25,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:25,470 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:25,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-19 10:19:25,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-19 10:19:25,675 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1869254391, now seen corresponding path program 43 times [2022-07-19 10:19:25,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802855793] [2022-07-19 10:19:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:26,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802855793] [2022-07-19 10:19:26,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802855793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671046250] [2022-07-19 10:19:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:19:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:26,384 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:26,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-19 10:19:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-19 10:19:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:27,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:19:27,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:28,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:28,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:28,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671046250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:28,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:28,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 68 [2022-07-19 10:19:28,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874090438] [2022-07-19 10:19:28,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:28,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 10:19:28,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 10:19:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4330, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 10:19:28,341 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-19 10:19:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:31,131 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2022-07-19 10:19:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-19 10:19:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 183 [2022-07-19 10:19:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:31,133 INFO L225 Difference]: With dead ends: 262 [2022-07-19 10:19:31,133 INFO L226 Difference]: Without dead ends: 260 [2022-07-19 10:19:31,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 361 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=739, Invalid=12601, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 10:19:31,134 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:31,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2440 Invalid, 4907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 10:19:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-19 10:19:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2022-07-19 10:19:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 10:19:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-19 10:19:31,176 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 183 [2022-07-19 10:19:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:31,176 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-19 10:19:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-19 10:19:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-19 10:19:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-19 10:19:31,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:31,177 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:31,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-19 10:19:31,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:31,378 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -443324860, now seen corresponding path program 44 times [2022-07-19 10:19:31,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:31,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250386702] [2022-07-19 10:19:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 771 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250386702] [2022-07-19 10:19:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250386702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791313679] [2022-07-19 10:19:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:32,096 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:32,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-19 10:19:32,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:32,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:32,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 10:19:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:32,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:33,019 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:33,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:33,148 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:33,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:33,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-19 10:19:33,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:33,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:33,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 770 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-19 10:19:34,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791313679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:34,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:34,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-07-19 10:19:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758874678] [2022-07-19 10:19:34,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-19 10:19:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-19 10:19:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4699, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 10:19:34,327 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-19 10:19:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:36,141 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2022-07-19 10:19:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 10:19:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) Word has length 187 [2022-07-19 10:19:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:36,142 INFO L225 Difference]: With dead ends: 249 [2022-07-19 10:19:36,142 INFO L226 Difference]: Without dead ends: 247 [2022-07-19 10:19:36,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 374 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=455, Invalid=8101, Unknown=0, NotChecked=0, Total=8556 [2022-07-19 10:19:36,143 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1794 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4013 Invalid, 0 Unknown, 117 Unchecked, 1.4s Time] [2022-07-19 10:19:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-19 10:19:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 189. [2022-07-19 10:19:36,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 10:19:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-19 10:19:36,188 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 187 [2022-07-19 10:19:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:36,188 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-19 10:19:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-19 10:19:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-19 10:19:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-19 10:19:36,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:36,190 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:36,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-19 10:19:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-19 10:19:36,399 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1846642579, now seen corresponding path program 45 times [2022-07-19 10:19:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093438546] [2022-07-19 10:19:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 10:19:36,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093438546] [2022-07-19 10:19:36,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093438546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358033152] [2022-07-19 10:19:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:19:36,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:36,732 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:36,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-19 10:19:37,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-19 10:19:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 10:19:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 10:19:37,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 10:19:37,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358033152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:37,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:37,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-19 10:19:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631980955] [2022-07-19 10:19:37,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 10:19:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:37,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 10:19:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 10:19:37,896 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 10:19:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:38,286 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2022-07-19 10:19:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 10:19:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 187 [2022-07-19 10:19:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:38,287 INFO L225 Difference]: With dead ends: 265 [2022-07-19 10:19:38,288 INFO L226 Difference]: Without dead ends: 201 [2022-07-19 10:19:38,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 10:19:38,288 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 375 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:38,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 319 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:19:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-19 10:19:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2022-07-19 10:19:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-19 10:19:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-07-19 10:19:38,336 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 187 [2022-07-19 10:19:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:38,336 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-07-19 10:19:38,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-19 10:19:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-07-19 10:19:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-19 10:19:38,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:38,338 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:38,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-19 10:19:38,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 10:19:38,547 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1911496390, now seen corresponding path program 46 times [2022-07-19 10:19:38,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:38,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816817650] [2022-07-19 10:19:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:39,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816817650] [2022-07-19 10:19:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816817650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:39,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011796401] [2022-07-19 10:19:39,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:19:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:39,192 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:39,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-19 10:19:39,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:19:39,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-19 10:19:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:40,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:42,348 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:19:42,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:19:42,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 103 proven. 818 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-19 10:19:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:43,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:43,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:43,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011796401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:43,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:43,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 72 [2022-07-19 10:19:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474403423] [2022-07-19 10:19:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:43,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-19 10:19:43,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-19 10:19:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4840, Unknown=1, NotChecked=0, Total=5112 [2022-07-19 10:19:43,480 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:19:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:45,374 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2022-07-19 10:19:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 10:19:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 191 [2022-07-19 10:19:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:45,376 INFO L225 Difference]: With dead ends: 257 [2022-07-19 10:19:45,376 INFO L226 Difference]: Without dead ends: 255 [2022-07-19 10:19:45,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2723 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=462, Invalid=8467, Unknown=1, NotChecked=0, Total=8930 [2022-07-19 10:19:45,377 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 111 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:45,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2248 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4302 Invalid, 0 Unknown, 132 Unchecked, 1.5s Time] [2022-07-19 10:19:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-19 10:19:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 197. [2022-07-19 10:19:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 10:19:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2022-07-19 10:19:45,446 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 191 [2022-07-19 10:19:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:45,447 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2022-07-19 10:19:45,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:19:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2022-07-19 10:19:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-19 10:19:45,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:45,448 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:45,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:45,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:45,663 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1959522608, now seen corresponding path program 47 times [2022-07-19 10:19:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660372708] [2022-07-19 10:19:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:46,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:46,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660372708] [2022-07-19 10:19:46,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660372708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:46,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221106291] [2022-07-19 10:19:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:19:46,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:46,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:46,287 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:46,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-19 10:19:46,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-19 10:19:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-19 10:19:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:47,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 10:19:47,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:47,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:48,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:48,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:19:48,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221106291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:48,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:48,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 72 [2022-07-19 10:19:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518869135] [2022-07-19 10:19:48,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:48,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-19 10:19:48,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-19 10:19:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 10:19:48,433 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:19:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:51,420 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2022-07-19 10:19:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 10:19:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 195 [2022-07-19 10:19:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:51,422 INFO L225 Difference]: With dead ends: 278 [2022-07-19 10:19:51,422 INFO L226 Difference]: Without dead ends: 276 [2022-07-19 10:19:51,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=786, Invalid=14220, Unknown=0, NotChecked=0, Total=15006 [2022-07-19 10:19:51,423 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 359 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 4994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:51,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2084 Invalid, 4994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4674 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 10:19:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-19 10:19:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2022-07-19 10:19:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 10:19:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-19 10:19:51,484 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 195 [2022-07-19 10:19:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:51,484 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-19 10:19:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-19 10:19:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-19 10:19:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 10:19:51,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:51,486 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:51,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-19 10:19:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-19 10:19:51,696 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1613643901, now seen corresponding path program 48 times [2022-07-19 10:19:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787690576] [2022-07-19 10:19:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:19:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 885 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:19:52,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787690576] [2022-07-19 10:19:52,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787690576] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474428875] [2022-07-19 10:19:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:19:52,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:52,332 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:52,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-19 10:19:52,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-19 10:19:52,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-19 10:19:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:53,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:19:53,618 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:53,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:53,744 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:53,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:19:54,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:19:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 164 proven. 882 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-19 10:19:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:54,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:19:54,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:19:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 884 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-19 10:19:54,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474428875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:54,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:54,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2022-07-19 10:19:54,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529560218] [2022-07-19 10:19:54,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:54,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-19 10:19:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-19 10:19:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4978, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 10:19:54,933 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-19 10:19:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:56,818 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-07-19 10:19:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 10:19:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) Word has length 199 [2022-07-19 10:19:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:56,819 INFO L225 Difference]: With dead ends: 265 [2022-07-19 10:19:56,819 INFO L226 Difference]: Without dead ends: 263 [2022-07-19 10:19:56,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=468, Invalid=8652, Unknown=0, NotChecked=0, Total=9120 [2022-07-19 10:19:56,821 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 173 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 4163 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:56,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1588 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4163 Invalid, 0 Unknown, 66 Unchecked, 1.4s Time] [2022-07-19 10:19:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-19 10:19:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2022-07-19 10:19:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 10:19:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-19 10:19:56,892 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 199 [2022-07-19 10:19:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:56,892 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-19 10:19:56,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-19 10:19:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-19 10:19:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 10:19:56,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:56,894 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:56,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:57,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:57,112 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1727141414, now seen corresponding path program 49 times [2022-07-19 10:19:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:57,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111773336] [2022-07-19 10:19:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 10:19:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111773336] [2022-07-19 10:19:57,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111773336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:57,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544439641] [2022-07-19 10:19:57,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:19:57,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:57,552 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:57,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-19 10:19:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 10:19:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 10:19:58,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 10:19:58,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544439641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:58,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:58,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-19 10:19:58,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070622886] [2022-07-19 10:19:58,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:58,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 10:19:58,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 10:19:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 10:19:58,509 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-19 10:19:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:58,914 INFO L93 Difference]: Finished difference Result 281 states and 286 transitions. [2022-07-19 10:19:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 10:19:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 199 [2022-07-19 10:19:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:58,916 INFO L225 Difference]: With dead ends: 281 [2022-07-19 10:19:58,916 INFO L226 Difference]: Without dead ends: 213 [2022-07-19 10:19:58,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 10:19:58,916 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 316 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:58,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 326 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:19:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-19 10:19:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2022-07-19 10:19:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 10:19:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-07-19 10:19:58,970 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 199 [2022-07-19 10:19:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:58,970 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-07-19 10:19:58,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-19 10:19:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-07-19 10:19:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-19 10:19:58,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:58,971 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:58,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:59,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-19 10:19:59,195 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash 785512179, now seen corresponding path program 50 times [2022-07-19 10:19:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:59,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063859075] [2022-07-19 10:19:59,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:59,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:19:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:19:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:19:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:19:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:19:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:19:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:19:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:19:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:19:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:19:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:19:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:19:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:19:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:19:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:19:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:19:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:19:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:19:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:19:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063859075] [2022-07-19 10:19:59,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063859075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145332282] [2022-07-19 10:19:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:59,856 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:19:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-19 10:20:00,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:20:00,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-19 10:20:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:00,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:01,035 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:20:01,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:20:01,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:20:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 110 proven. 936 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-19 10:20:01,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:01,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:20:01,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:20:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:20:02,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145332282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:02,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:02,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 76 [2022-07-19 10:20:02,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333112463] [2022-07-19 10:20:02,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:02,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-19 10:20:02,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-19 10:20:02,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5413, Unknown=0, NotChecked=0, Total=5700 [2022-07-19 10:20:02,274 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-19 10:20:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:04,050 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-07-19 10:20:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 10:20:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 203 [2022-07-19 10:20:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:04,052 INFO L225 Difference]: With dead ends: 268 [2022-07-19 10:20:04,052 INFO L226 Difference]: Without dead ends: 266 [2022-07-19 10:20:04,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 410 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=452, Invalid=8860, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 10:20:04,053 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:04,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1827 Invalid, 4155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3970 Invalid, 0 Unknown, 116 Unchecked, 1.3s Time] [2022-07-19 10:20:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-19 10:20:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-07-19 10:20:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-19 10:20:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2022-07-19 10:20:04,129 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 203 [2022-07-19 10:20:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:04,129 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2022-07-19 10:20:04,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-19 10:20:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2022-07-19 10:20:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-19 10:20:04,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:04,131 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:04,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:04,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-19 10:20:04,347 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash -14056855, now seen corresponding path program 51 times [2022-07-19 10:20:04,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:04,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020151147] [2022-07-19 10:20:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:20:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020151147] [2022-07-19 10:20:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020151147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159643065] [2022-07-19 10:20:05,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:20:05,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:05,076 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:05,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-19 10:20:06,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-19 10:20:06,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 10:20:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:06,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:08,122 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:20:08,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:20:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 486 proven. 556 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:20:08,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:09,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:20:09,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:20:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 471 proven. 571 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:20:10,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159643065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:10,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:10,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 116 [2022-07-19 10:20:10,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172328785] [2022-07-19 10:20:10,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:10,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-19 10:20:10,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-19 10:20:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=11971, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 10:20:10,825 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-19 10:20:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:15,259 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-19 10:20:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-19 10:20:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 207 [2022-07-19 10:20:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:15,260 INFO L225 Difference]: With dead ends: 272 [2022-07-19 10:20:15,260 INFO L226 Difference]: Without dead ends: 204 [2022-07-19 10:20:15,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3576, Invalid=35826, Unknown=0, NotChecked=0, Total=39402 [2022-07-19 10:20:15,262 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 153 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:15,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1511 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1903 Invalid, 0 Unknown, 382 Unchecked, 0.7s Time] [2022-07-19 10:20:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-19 10:20:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-19 10:20:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-19 10:20:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-07-19 10:20:15,323 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 207 [2022-07-19 10:20:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:15,324 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-07-19 10:20:15,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-19 10:20:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-07-19 10:20:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-19 10:20:15,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:15,325 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:15,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-19 10:20:15,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:15,535 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash -920417866, now seen corresponding path program 52 times [2022-07-19 10:20:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:15,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193707277] [2022-07-19 10:20:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:15,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 10:20:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1007 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193707277] [2022-07-19 10:20:16,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193707277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865745640] [2022-07-19 10:20:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:20:16,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:16,230 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:16,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-19 10:20:16,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:20:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-19 10:20:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:17,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:17,486 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:17,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:20:17,625 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:17,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:20:18,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:20:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 175 proven. 1004 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-07-19 10:20:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:18,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:20:18,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:20:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1006 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-19 10:20:18,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865745640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:18,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:18,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2022-07-19 10:20:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903239919] [2022-07-19 10:20:18,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:18,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-19 10:20:18,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-19 10:20:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5558, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 10:20:18,878 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-19 10:20:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:21,057 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-07-19 10:20:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 10:20:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) Word has length 211 [2022-07-19 10:20:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:21,058 INFO L225 Difference]: With dead ends: 218 [2022-07-19 10:20:21,058 INFO L226 Difference]: Without dead ends: 216 [2022-07-19 10:20:21,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 413 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=492, Invalid=9608, Unknown=0, NotChecked=0, Total=10100 [2022-07-19 10:20:21,059 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 181 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:21,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2359 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 4362 Invalid, 0 Unknown, 103 Unchecked, 1.7s Time] [2022-07-19 10:20:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-19 10:20:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-19 10:20:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-19 10:20:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-07-19 10:20:21,113 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 211 [2022-07-19 10:20:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:21,113 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-07-19 10:20:21,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-19 10:20:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-07-19 10:20:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-19 10:20:21,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:21,115 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:21,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-19 10:20:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:21,335 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 488504236, now seen corresponding path program 53 times [2022-07-19 10:20:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:21,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845901861] [2022-07-19 10:20:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:21,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:21,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 10:20:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845901861] [2022-07-19 10:20:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845901861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379046396] [2022-07-19 10:20:22,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:20:22,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:22,043 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:22,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-19 10:20:22,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-19 10:20:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-19 10:20:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:23,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:23,396 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:20:23,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:20:24,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:20:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 117 proven. 1062 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-19 10:20:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:24,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:20:24,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:20:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:24,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379046396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:24,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:24,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 80 [2022-07-19 10:20:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897172382] [2022-07-19 10:20:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-19 10:20:24,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-19 10:20:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6017, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 10:20:24,774 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-19 10:20:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:27,108 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-07-19 10:20:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 10:20:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) Word has length 215 [2022-07-19 10:20:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:27,109 INFO L225 Difference]: With dead ends: 295 [2022-07-19 10:20:27,109 INFO L226 Difference]: Without dead ends: 293 [2022-07-19 10:20:27,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=534, Invalid=10386, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 10:20:27,110 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 131 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:27,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 2835 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5126 Invalid, 0 Unknown, 123 Unchecked, 1.8s Time] [2022-07-19 10:20:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-19 10:20:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 221. [2022-07-19 10:20:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-19 10:20:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-07-19 10:20:27,193 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 215 [2022-07-19 10:20:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:27,194 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-07-19 10:20:27,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-19 10:20:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-07-19 10:20:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-19 10:20:27,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:27,195 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:27,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:27,415 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash 704807586, now seen corresponding path program 54 times [2022-07-19 10:20:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321314049] [2022-07-19 10:20:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 10:20:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:28,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:28,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321314049] [2022-07-19 10:20:28,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321314049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678484814] [2022-07-19 10:20:28,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:20:28,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:28,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:28,194 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-19 10:20:28,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-19 10:20:28,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:28,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 10:20:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:29,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:31,124 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:20:31,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-19 10:20:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 550 proven. 625 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:32,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-19 10:20:32,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-19 10:20:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 534 proven. 641 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-19 10:20:34,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678484814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:34,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:34,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2022-07-19 10:20:34,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082346075] [2022-07-19 10:20:34,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:34,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-19 10:20:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-19 10:20:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=13252, Unknown=0, NotChecked=0, Total=14762 [2022-07-19 10:20:34,063 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-19 10:20:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:38,975 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-07-19 10:20:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-19 10:20:38,976 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) Word has length 219 [2022-07-19 10:20:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:38,977 INFO L225 Difference]: With dead ends: 288 [2022-07-19 10:20:38,977 INFO L226 Difference]: Without dead ends: 216 [2022-07-19 10:20:38,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12261 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3939, Invalid=39951, Unknown=0, NotChecked=0, Total=43890 [2022-07-19 10:20:38,980 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 64 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:38,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2339 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2345 Invalid, 0 Unknown, 226 Unchecked, 0.9s Time] [2022-07-19 10:20:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-19 10:20:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-19 10:20:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-19 10:20:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-07-19 10:20:39,046 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 219 [2022-07-19 10:20:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-07-19 10:20:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-19 10:20:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-07-19 10:20:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-19 10:20:39,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:39,047 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:39,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:39,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-19 10:20:39,263 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash 762479087, now seen corresponding path program 55 times [2022-07-19 10:20:39,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:39,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172019522] [2022-07-19 10:20:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:39,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:39,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 10:20:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-19 10:20:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1137 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-19 10:20:40,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172019522] [2022-07-19 10:20:40,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172019522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533036410] [2022-07-19 10:20:40,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:20:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:40,021 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:40,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-19 10:20:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-19 10:20:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:41,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:41,195 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:41,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:20:41,328 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:41,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-19 10:20:41,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-19 10:20:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 186 proven. 1134 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-07-19 10:20:42,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:42,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-19 10:20:42,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-19 10:20:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1136 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-19 10:20:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533036410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:42,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:42,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 81 [2022-07-19 10:20:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040345125] [2022-07-19 10:20:42,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:42,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-19 10:20:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-19 10:20:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6170, Unknown=0, NotChecked=0, Total=6480 [2022-07-19 10:20:42,654 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-19 10:20:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:44,914 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-07-19 10:20:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 10:20:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) Word has length 223 [2022-07-19 10:20:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:44,916 INFO L225 Difference]: With dead ends: 230 [2022-07-19 10:20:44,916 INFO L226 Difference]: Without dead ends: 228 [2022-07-19 10:20:44,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 436 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=516, Invalid=10614, Unknown=0, NotChecked=0, Total=11130 [2022-07-19 10:20:44,917 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 140 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 5337 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 5544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:44,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2584 Invalid, 5544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5337 Invalid, 0 Unknown, 70 Unchecked, 1.8s Time] [2022-07-19 10:20:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-19 10:20:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2022-07-19 10:20:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-19 10:20:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-07-19 10:20:44,999 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 223 [2022-07-19 10:20:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:44,999 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-07-19 10:20:44,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-19 10:20:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-07-19 10:20:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-19 10:20:45,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:45,001 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:45,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-19 10:20:45,226 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1414803301, now seen corresponding path program 56 times [2022-07-19 10:20:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:45,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842868143] [2022-07-19 10:20:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:20:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 10:20:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:20:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:20:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:20:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 10:20:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 10:20:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 10:20:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 10:20:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 10:20:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:20:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-19 10:20:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-19 10:20:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 10:20:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-19 10:20:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-19 10:20:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-19 10:20:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 10:20:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-19 10:20:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-19 10:20:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-19 10:20:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842868143] [2022-07-19 10:20:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842868143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981397645] [2022-07-19 10:20:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:20:46,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:46,100 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:46,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-19 10:20:46,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:20:46,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 10:20:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:47,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 10:20:49,496 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:20:49,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 10:20:50,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7