./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/openssl/s3_srvr.blast.02.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:15:21,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:15:21,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:15:21,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:15:21,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:15:21,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:15:21,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:15:21,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:15:21,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:15:21,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:15:21,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:15:21,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:15:21,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:15:21,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:15:21,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:15:21,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:15:21,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:15:21,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:15:21,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:15:21,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:15:21,575 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:15:21,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:15:21,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:15:21,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:15:21,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:15:21,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:15:21,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:15:21,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:15:21,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:15:21,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:15:21,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:15:21,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:15:21,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:15:21,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:15:21,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:15:21,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:15:21,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:15:21,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:15:21,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:15:21,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:15:21,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:15:21,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:15:21,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:15:21,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:15:21,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:15:21,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:15:21,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:15:21,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:15:21,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:15:21,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:15:21,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:15:21,640 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:15:21,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:15:21,641 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:15:21,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:15:21,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:15:21,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:15:21,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:15:21,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:15:21,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:15:21,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:15:21,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:15:21,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:15:21,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:15:21,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:15:21,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:15:21,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:15:21,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:15:21,657 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:15:21,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:15:21,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:15:21,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2022-07-22 11:15:21,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:15:21,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:15:21,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:15:21,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:15:21,914 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:15:21,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-22 11:15:21,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0dc02783/a285b6d3eec74723a01d4e433b630d57/FLAG97f9eb823 [2022-07-22 11:15:22,528 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:15:22,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2022-07-22 11:15:22,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0dc02783/a285b6d3eec74723a01d4e433b630d57/FLAG97f9eb823 [2022-07-22 11:15:22,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0dc02783/a285b6d3eec74723a01d4e433b630d57 [2022-07-22 11:15:22,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:15:22,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:15:22,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:15:22,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:15:22,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:15:22,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:15:22" (1/1) ... [2022-07-22 11:15:22,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28079613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:22, skipping insertion in model container [2022-07-22 11:15:22,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:15:22" (1/1) ... [2022-07-22 11:15:22,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:15:22,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:15:23,139 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/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2022-07-22 11:15:23,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:15:23,169 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:15:23,280 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/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2022-07-22 11:15:23,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:15:23,297 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:15:23,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23 WrapperNode [2022-07-22 11:15:23,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:15:23,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:15:23,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:15:23,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:15:23,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,369 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 782 [2022-07-22 11:15:23,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:15:23,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:15:23,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:15:23,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:15:23,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:15:23,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:15:23,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:15:23,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:15:23,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (1/1) ... [2022-07-22 11:15:23,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:15:23,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:15:23,537 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) [2022-07-22 11:15:23,563 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 [2022-07-22 11:15:23,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:15:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:15:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:15:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:15:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:15:23,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:15:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:15:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:15:23,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:15:23,699 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:15:23,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:15:23,714 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:15:26,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-22 11:15:26,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-22 11:15:26,532 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:15:26,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:15:26,538 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:15:26,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:15:26 BoogieIcfgContainer [2022-07-22 11:15:26,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:15:26,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:15:26,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:15:26,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:15:26,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:15:22" (1/3) ... [2022-07-22 11:15:26,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546654e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:15:26, skipping insertion in model container [2022-07-22 11:15:26,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:15:23" (2/3) ... [2022-07-22 11:15:26,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546654e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:15:26, skipping insertion in model container [2022-07-22 11:15:26,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:15:26" (3/3) ... [2022-07-22 11:15:26,551 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2022-07-22 11:15:26,564 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:15:26,565 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:15:26,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:15:26,640 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@e674a3f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e3f7f7c [2022-07-22 11:15:26,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:15:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 11:15:26,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:26,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:26,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2022-07-22 11:15:26,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:26,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177953066] [2022-07-22 11:15:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:27,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177953066] [2022-07-22 11:15:27,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177953066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:27,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:27,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:27,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013331588] [2022-07-22 11:15:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:27,194 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:28,751 INFO L93 Difference]: Finished difference Result 406 states and 687 transitions. [2022-07-22 11:15:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-22 11:15:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:28,766 INFO L225 Difference]: With dead ends: 406 [2022-07-22 11:15:28,767 INFO L226 Difference]: Without dead ends: 246 [2022-07-22 11:15:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:28,773 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:28,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 411 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:15:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-22 11:15:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2022-07-22 11:15:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6091954022988506) internal successors, (280), 174 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 280 transitions. [2022-07-22 11:15:28,818 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 280 transitions. Word has length 47 [2022-07-22 11:15:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:28,819 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 280 transitions. [2022-07-22 11:15:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 280 transitions. [2022-07-22 11:15:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:15:28,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:28,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:15:28,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829262, now seen corresponding path program 1 times [2022-07-22 11:15:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:28,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342401461] [2022-07-22 11:15:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:29,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:29,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342401461] [2022-07-22 11:15:29,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342401461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:29,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:29,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635158786] [2022-07-22 11:15:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:29,029 INFO L87 Difference]: Start difference. First operand 175 states and 280 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:30,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:30,668 INFO L93 Difference]: Finished difference Result 368 states and 587 transitions. [2022-07-22 11:15:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 11:15:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:30,683 INFO L225 Difference]: With dead ends: 368 [2022-07-22 11:15:30,685 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 11:15:30,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:30,688 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:30,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 439 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:15:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 11:15:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-22 11:15:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6162162162162161) internal successors, (299), 185 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 299 transitions. [2022-07-22 11:15:30,713 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 299 transitions. Word has length 48 [2022-07-22 11:15:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:30,714 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 299 transitions. [2022-07-22 11:15:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 299 transitions. [2022-07-22 11:15:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:15:30,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:30,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:15:30,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:30,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1875534592, now seen corresponding path program 1 times [2022-07-22 11:15:30,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054226478] [2022-07-22 11:15:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:30,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054226478] [2022-07-22 11:15:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054226478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:30,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:30,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123068099] [2022-07-22 11:15:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:30,887 INFO L87 Difference]: Start difference. First operand 186 states and 299 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:32,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:33,237 INFO L93 Difference]: Finished difference Result 368 states and 586 transitions. [2022-07-22 11:15:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-22 11:15:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:33,239 INFO L225 Difference]: With dead ends: 368 [2022-07-22 11:15:33,239 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 11:15:33,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:33,241 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 24 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 441 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:15:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 11:15:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2022-07-22 11:15:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6108108108108108) internal successors, (298), 185 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 298 transitions. [2022-07-22 11:15:33,251 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 298 transitions. Word has length 61 [2022-07-22 11:15:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:33,251 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 298 transitions. [2022-07-22 11:15:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 298 transitions. [2022-07-22 11:15:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:15:33,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:33,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:15:33,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1839351473, now seen corresponding path program 1 times [2022-07-22 11:15:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:33,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558612647] [2022-07-22 11:15:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:33,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558612647] [2022-07-22 11:15:33,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558612647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:33,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:33,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826330327] [2022-07-22 11:15:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:33,425 INFO L87 Difference]: Start difference. First operand 186 states and 298 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:35,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:35,687 INFO L93 Difference]: Finished difference Result 367 states and 584 transitions. [2022-07-22 11:15:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-22 11:15:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:35,689 INFO L225 Difference]: With dead ends: 367 [2022-07-22 11:15:35,689 INFO L226 Difference]: Without dead ends: 202 [2022-07-22 11:15:35,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:35,690 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 28 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:35,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-22 11:15:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-22 11:15:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6054054054054054) internal successors, (297), 185 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 297 transitions. [2022-07-22 11:15:35,699 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 297 transitions. Word has length 62 [2022-07-22 11:15:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:35,699 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 297 transitions. [2022-07-22 11:15:35,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 297 transitions. [2022-07-22 11:15:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:15:35,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:35,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:35,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:15:35,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1630821317, now seen corresponding path program 1 times [2022-07-22 11:15:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:35,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367841815] [2022-07-22 11:15:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367841815] [2022-07-22 11:15:35,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367841815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:35,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872297326] [2022-07-22 11:15:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:35,829 INFO L87 Difference]: Start difference. First operand 186 states and 297 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:37,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:38,090 INFO L93 Difference]: Finished difference Result 367 states and 583 transitions. [2022-07-22 11:15:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-22 11:15:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:38,092 INFO L225 Difference]: With dead ends: 367 [2022-07-22 11:15:38,092 INFO L226 Difference]: Without dead ends: 202 [2022-07-22 11:15:38,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:38,093 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 26 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:38,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 443 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-22 11:15:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2022-07-22 11:15:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.6) internal successors, (296), 185 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 296 transitions. [2022-07-22 11:15:38,099 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 296 transitions. Word has length 62 [2022-07-22 11:15:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:38,100 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 296 transitions. [2022-07-22 11:15:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 296 transitions. [2022-07-22 11:15:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:15:38,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:38,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:38,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:15:38,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash 509961732, now seen corresponding path program 1 times [2022-07-22 11:15:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336327949] [2022-07-22 11:15:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:38,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:38,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336327949] [2022-07-22 11:15:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336327949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:38,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:38,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270102] [2022-07-22 11:15:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:38,208 INFO L87 Difference]: Start difference. First operand 186 states and 296 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:40,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:40,497 INFO L93 Difference]: Finished difference Result 366 states and 581 transitions. [2022-07-22 11:15:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-22 11:15:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:40,501 INFO L225 Difference]: With dead ends: 366 [2022-07-22 11:15:40,502 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 11:15:40,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:40,503 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 19 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:40,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 445 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:15:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 11:15:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2022-07-22 11:15:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5945945945945945) internal successors, (295), 185 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 295 transitions. [2022-07-22 11:15:40,510 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 295 transitions. Word has length 62 [2022-07-22 11:15:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:40,511 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 295 transitions. [2022-07-22 11:15:40,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 295 transitions. [2022-07-22 11:15:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:15:40,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:40,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:15:40,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1144939844, now seen corresponding path program 1 times [2022-07-22 11:15:40,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:40,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507388597] [2022-07-22 11:15:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:40,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:40,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:40,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507388597] [2022-07-22 11:15:40,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507388597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:40,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:40,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:40,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141884481] [2022-07-22 11:15:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:40,648 INFO L87 Difference]: Start difference. First operand 186 states and 295 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:42,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:42,873 INFO L93 Difference]: Finished difference Result 364 states and 578 transitions. [2022-07-22 11:15:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:42,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-22 11:15:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:42,875 INFO L225 Difference]: With dead ends: 364 [2022-07-22 11:15:42,875 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 11:15:42,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:42,877 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 19 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:42,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 11:15:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-22 11:15:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5891891891891892) internal successors, (294), 185 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 294 transitions. [2022-07-22 11:15:42,883 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 294 transitions. Word has length 62 [2022-07-22 11:15:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:42,883 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 294 transitions. [2022-07-22 11:15:42,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 294 transitions. [2022-07-22 11:15:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:15:42,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:42,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:15:42,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1652438455, now seen corresponding path program 1 times [2022-07-22 11:15:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687524814] [2022-07-22 11:15:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687524814] [2022-07-22 11:15:43,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687524814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:43,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:43,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276413418] [2022-07-22 11:15:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:43,012 INFO L87 Difference]: Start difference. First operand 186 states and 294 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:45,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:45,258 INFO L93 Difference]: Finished difference Result 364 states and 577 transitions. [2022-07-22 11:15:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 11:15:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:45,259 INFO L225 Difference]: With dead ends: 364 [2022-07-22 11:15:45,259 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 11:15:45,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:45,260 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 22 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:45,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 11:15:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-22 11:15:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5837837837837838) internal successors, (293), 185 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2022-07-22 11:15:45,266 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 63 [2022-07-22 11:15:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:45,266 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2022-07-22 11:15:45,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2022-07-22 11:15:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 11:15:45,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:45,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:45,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:15:45,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -848424362, now seen corresponding path program 1 times [2022-07-22 11:15:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:45,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385788890] [2022-07-22 11:15:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:45,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385788890] [2022-07-22 11:15:45,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385788890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:45,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:45,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568238809] [2022-07-22 11:15:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:45,393 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:47,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:47,612 INFO L93 Difference]: Finished difference Result 364 states and 576 transitions. [2022-07-22 11:15:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:47,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-22 11:15:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:47,614 INFO L225 Difference]: With dead ends: 364 [2022-07-22 11:15:47,614 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 11:15:47,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:47,615 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 449 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 11:15:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-07-22 11:15:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5783783783783785) internal successors, (292), 185 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 292 transitions. [2022-07-22 11:15:47,620 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 292 transitions. Word has length 64 [2022-07-22 11:15:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:47,620 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 292 transitions. [2022-07-22 11:15:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 292 transitions. [2022-07-22 11:15:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:15:47,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:47,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:47,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:15:47,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:47,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2026506290, now seen corresponding path program 1 times [2022-07-22 11:15:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:47,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907850909] [2022-07-22 11:15:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907850909] [2022-07-22 11:15:47,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907850909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:47,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:47,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468828501] [2022-07-22 11:15:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:47,728 INFO L87 Difference]: Start difference. First operand 186 states and 292 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:49,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:49,932 INFO L93 Difference]: Finished difference Result 354 states and 562 transitions. [2022-07-22 11:15:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 11:15:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:49,934 INFO L225 Difference]: With dead ends: 354 [2022-07-22 11:15:49,934 INFO L226 Difference]: Without dead ends: 189 [2022-07-22 11:15:49,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:49,935 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:49,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:15:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-22 11:15:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2022-07-22 11:15:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.572972972972973) internal successors, (291), 185 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 291 transitions. [2022-07-22 11:15:49,940 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 291 transitions. Word has length 65 [2022-07-22 11:15:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:49,941 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 291 transitions. [2022-07-22 11:15:49,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 291 transitions. [2022-07-22 11:15:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:15:49,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:49,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:15:49,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1546297802, now seen corresponding path program 1 times [2022-07-22 11:15:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:49,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676134488] [2022-07-22 11:15:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676134488] [2022-07-22 11:15:50,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676134488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:50,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:50,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330949582] [2022-07-22 11:15:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:50,053 INFO L87 Difference]: Start difference. First operand 186 states and 291 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:52,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:52,434 INFO L93 Difference]: Finished difference Result 465 states and 733 transitions. [2022-07-22 11:15:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 11:15:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:52,437 INFO L225 Difference]: With dead ends: 465 [2022-07-22 11:15:52,437 INFO L226 Difference]: Without dead ends: 298 [2022-07-22 11:15:52,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:52,438 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 111 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:52,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 312 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:15:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-22 11:15:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 228. [2022-07-22 11:15:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6255506607929515) internal successors, (369), 227 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 369 transitions. [2022-07-22 11:15:52,447 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 369 transitions. Word has length 65 [2022-07-22 11:15:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:52,447 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 369 transitions. [2022-07-22 11:15:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 369 transitions. [2022-07-22 11:15:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 11:15:52,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:52,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:15:52,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 632591508, now seen corresponding path program 1 times [2022-07-22 11:15:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102547904] [2022-07-22 11:15:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:52,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102547904] [2022-07-22 11:15:52,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102547904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:52,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:52,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110516340] [2022-07-22 11:15:52,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:52,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:52,571 INFO L87 Difference]: Start difference. First operand 228 states and 369 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:54,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:54,946 INFO L93 Difference]: Finished difference Result 544 states and 881 transitions. [2022-07-22 11:15:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-22 11:15:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:54,948 INFO L225 Difference]: With dead ends: 544 [2022-07-22 11:15:54,948 INFO L226 Difference]: Without dead ends: 337 [2022-07-22 11:15:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:54,949 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:54,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 314 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:15:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-22 11:15:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 260. [2022-07-22 11:15:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.6447876447876448) internal successors, (426), 259 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 426 transitions. [2022-07-22 11:15:54,956 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 426 transitions. Word has length 93 [2022-07-22 11:15:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:54,956 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 426 transitions. [2022-07-22 11:15:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 426 transitions. [2022-07-22 11:15:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 11:15:54,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:54,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:54,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:15:54,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1221146161, now seen corresponding path program 1 times [2022-07-22 11:15:54,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:54,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979312607] [2022-07-22 11:15:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:54,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:15:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979312607] [2022-07-22 11:15:55,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979312607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:55,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:55,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407814170] [2022-07-22 11:15:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:55,070 INFO L87 Difference]: Start difference. First operand 260 states and 426 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:57,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:57,454 INFO L93 Difference]: Finished difference Result 613 states and 1000 transitions. [2022-07-22 11:15:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-22 11:15:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:57,456 INFO L225 Difference]: With dead ends: 613 [2022-07-22 11:15:57,456 INFO L226 Difference]: Without dead ends: 374 [2022-07-22 11:15:57,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:57,457 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 111 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:57,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 318 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:15:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-22 11:15:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 303. [2022-07-22 11:15:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 302 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 502 transitions. [2022-07-22 11:15:57,465 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 502 transitions. Word has length 105 [2022-07-22 11:15:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:57,465 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 502 transitions. [2022-07-22 11:15:57,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 502 transitions. [2022-07-22 11:15:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 11:15:57,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:57,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:15:57,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1500161074, now seen corresponding path program 1 times [2022-07-22 11:15:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555430761] [2022-07-22 11:15:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:15:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:15:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 11:15:57,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:15:57,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555430761] [2022-07-22 11:15:57,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555430761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:15:57,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:15:57,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:15:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856233009] [2022-07-22 11:15:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:15:57,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:15:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:15:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:15:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:15:57,571 INFO L87 Difference]: Start difference. First operand 303 states and 502 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:59,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:15:59,961 INFO L93 Difference]: Finished difference Result 697 states and 1149 transitions. [2022-07-22 11:15:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:15:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-22 11:15:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:15:59,963 INFO L225 Difference]: With dead ends: 697 [2022-07-22 11:15:59,963 INFO L226 Difference]: Without dead ends: 415 [2022-07-22 11:15:59,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:15:59,964 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 136 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:15:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:15:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-22 11:15:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 319. [2022-07-22 11:15:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.650943396226415) internal successors, (525), 318 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 525 transitions. [2022-07-22 11:15:59,972 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 525 transitions. Word has length 106 [2022-07-22 11:15:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:15:59,973 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 525 transitions. [2022-07-22 11:15:59,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:15:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 525 transitions. [2022-07-22 11:15:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 11:15:59,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:15:59,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:15:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:15:59,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:15:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:15:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2144263610, now seen corresponding path program 1 times [2022-07-22 11:15:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:15:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638675889] [2022-07-22 11:15:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:15:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:16:00,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:00,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638675889] [2022-07-22 11:16:00,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638675889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:00,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254392133] [2022-07-22 11:16:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:00,075 INFO L87 Difference]: Start difference. First operand 319 states and 525 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:02,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:02,343 INFO L93 Difference]: Finished difference Result 661 states and 1092 transitions. [2022-07-22 11:16:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-22 11:16:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:02,345 INFO L225 Difference]: With dead ends: 661 [2022-07-22 11:16:02,345 INFO L226 Difference]: Without dead ends: 363 [2022-07-22 11:16:02,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:02,346 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 35 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:02,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 461 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-07-22 11:16:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2022-07-22 11:16:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6529411764705881) internal successors, (562), 340 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 562 transitions. [2022-07-22 11:16:02,354 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 562 transitions. Word has length 106 [2022-07-22 11:16:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:02,355 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 562 transitions. [2022-07-22 11:16:02,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 562 transitions. [2022-07-22 11:16:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-22 11:16:02,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:02,356 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:02,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:16:02,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1195785078, now seen corresponding path program 1 times [2022-07-22 11:16:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712247658] [2022-07-22 11:16:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:02,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 11:16:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:02,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712247658] [2022-07-22 11:16:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712247658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:02,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:02,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762482431] [2022-07-22 11:16:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:02,477 INFO L87 Difference]: Start difference. First operand 341 states and 562 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:04,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:04,843 INFO L93 Difference]: Finished difference Result 731 states and 1193 transitions. [2022-07-22 11:16:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:04,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-07-22 11:16:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:04,846 INFO L225 Difference]: With dead ends: 731 [2022-07-22 11:16:04,846 INFO L226 Difference]: Without dead ends: 411 [2022-07-22 11:16:04,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:04,847 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 135 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:04,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-07-22 11:16:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 341. [2022-07-22 11:16:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.638235294117647) internal successors, (557), 340 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 557 transitions. [2022-07-22 11:16:04,856 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 557 transitions. Word has length 107 [2022-07-22 11:16:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:04,856 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 557 transitions. [2022-07-22 11:16:04,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 557 transitions. [2022-07-22 11:16:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:16:04,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:04,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:04,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:16:04,858 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 240959469, now seen corresponding path program 1 times [2022-07-22 11:16:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:04,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617270125] [2022-07-22 11:16:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:04,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 11:16:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617270125] [2022-07-22 11:16:04,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617270125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:04,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:04,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263124858] [2022-07-22 11:16:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:04,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:04,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:04,980 INFO L87 Difference]: Start difference. First operand 341 states and 557 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:06,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:07,367 INFO L93 Difference]: Finished difference Result 730 states and 1182 transitions. [2022-07-22 11:16:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 11:16:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:07,369 INFO L225 Difference]: With dead ends: 730 [2022-07-22 11:16:07,370 INFO L226 Difference]: Without dead ends: 410 [2022-07-22 11:16:07,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:07,371 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 140 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:07,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-22 11:16:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-22 11:16:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6205882352941177) internal successors, (551), 340 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 551 transitions. [2022-07-22 11:16:07,379 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 551 transitions. Word has length 120 [2022-07-22 11:16:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:07,380 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 551 transitions. [2022-07-22 11:16:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 551 transitions. [2022-07-22 11:16:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:16:07,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:07,381 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:16:07,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1953173121, now seen corresponding path program 1 times [2022-07-22 11:16:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:07,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750525911] [2022-07-22 11:16:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 11:16:07,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750525911] [2022-07-22 11:16:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750525911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:07,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:07,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257714296] [2022-07-22 11:16:07,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:07,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:07,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:07,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:07,487 INFO L87 Difference]: Start difference. First operand 341 states and 551 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:09,880 INFO L93 Difference]: Finished difference Result 730 states and 1170 transitions. [2022-07-22 11:16:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:09,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 11:16:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:09,882 INFO L225 Difference]: With dead ends: 730 [2022-07-22 11:16:09,882 INFO L226 Difference]: Without dead ends: 410 [2022-07-22 11:16:09,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:09,883 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 138 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:09,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-22 11:16:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-22 11:16:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6029411764705883) internal successors, (545), 340 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 545 transitions. [2022-07-22 11:16:09,891 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 545 transitions. Word has length 120 [2022-07-22 11:16:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:09,892 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 545 transitions. [2022-07-22 11:16:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 545 transitions. [2022-07-22 11:16:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 11:16:09,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:09,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:09,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:16:09,894 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1985043260, now seen corresponding path program 1 times [2022-07-22 11:16:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475630913] [2022-07-22 11:16:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 11:16:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475630913] [2022-07-22 11:16:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475630913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:10,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:10,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294215477] [2022-07-22 11:16:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:10,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:10,010 INFO L87 Difference]: Start difference. First operand 341 states and 545 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:12,249 INFO L93 Difference]: Finished difference Result 679 states and 1090 transitions. [2022-07-22 11:16:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 11:16:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:12,251 INFO L225 Difference]: With dead ends: 679 [2022-07-22 11:16:12,251 INFO L226 Difference]: Without dead ends: 359 [2022-07-22 11:16:12,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:12,252 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 35 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:12,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-22 11:16:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-22 11:16:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.6) internal successors, (544), 340 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 544 transitions. [2022-07-22 11:16:12,260 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 544 transitions. Word has length 120 [2022-07-22 11:16:12,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:12,260 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 544 transitions. [2022-07-22 11:16:12,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 544 transitions. [2022-07-22 11:16:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-22 11:16:12,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:12,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:12,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:16:12,262 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1586861309, now seen corresponding path program 1 times [2022-07-22 11:16:12,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:12,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268932854] [2022-07-22 11:16:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 11:16:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268932854] [2022-07-22 11:16:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268932854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:12,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624772173] [2022-07-22 11:16:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:12,417 INFO L87 Difference]: Start difference. First operand 341 states and 544 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:14,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:14,673 INFO L93 Difference]: Finished difference Result 679 states and 1088 transitions. [2022-07-22 11:16:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-22 11:16:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:14,675 INFO L225 Difference]: With dead ends: 679 [2022-07-22 11:16:14,675 INFO L226 Difference]: Without dead ends: 359 [2022-07-22 11:16:14,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:14,676 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 39 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 469 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-22 11:16:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2022-07-22 11:16:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5970588235294119) internal successors, (543), 340 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 543 transitions. [2022-07-22 11:16:14,683 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 543 transitions. Word has length 121 [2022-07-22 11:16:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:14,683 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 543 transitions. [2022-07-22 11:16:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 543 transitions. [2022-07-22 11:16:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-22 11:16:14,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:14,685 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:16:14,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1735358010, now seen corresponding path program 1 times [2022-07-22 11:16:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:14,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405121854] [2022-07-22 11:16:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 11:16:14,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405121854] [2022-07-22 11:16:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405121854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:14,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956859696] [2022-07-22 11:16:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:14,819 INFO L87 Difference]: Start difference. First operand 341 states and 543 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:16,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:17,140 INFO L93 Difference]: Finished difference Result 730 states and 1154 transitions. [2022-07-22 11:16:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-07-22 11:16:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:17,142 INFO L225 Difference]: With dead ends: 730 [2022-07-22 11:16:17,142 INFO L226 Difference]: Without dead ends: 410 [2022-07-22 11:16:17,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:17,143 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 135 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:17,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-22 11:16:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 341. [2022-07-22 11:16:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5794117647058823) internal successors, (537), 340 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 537 transitions. [2022-07-22 11:16:17,151 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 537 transitions. Word has length 122 [2022-07-22 11:16:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:17,151 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 537 transitions. [2022-07-22 11:16:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 537 transitions. [2022-07-22 11:16:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 11:16:17,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:17,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:17,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:16:17,152 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2093537762, now seen corresponding path program 1 times [2022-07-22 11:16:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:17,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997886814] [2022-07-22 11:16:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 11:16:17,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997886814] [2022-07-22 11:16:17,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997886814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:17,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:17,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741446495] [2022-07-22 11:16:17,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:17,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:17,259 INFO L87 Difference]: Start difference. First operand 341 states and 537 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:19,456 INFO L93 Difference]: Finished difference Result 669 states and 1061 transitions. [2022-07-22 11:16:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-07-22 11:16:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:19,458 INFO L225 Difference]: With dead ends: 669 [2022-07-22 11:16:19,458 INFO L226 Difference]: Without dead ends: 349 [2022-07-22 11:16:19,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:19,459 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:19,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 483 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-22 11:16:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2022-07-22 11:16:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.576470588235294) internal successors, (536), 340 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 536 transitions. [2022-07-22 11:16:19,467 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 536 transitions. Word has length 123 [2022-07-22 11:16:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:19,467 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 536 transitions. [2022-07-22 11:16:19,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2022-07-22 11:16:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 11:16:19,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:19,469 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 11:16:19,469 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1960687741, now seen corresponding path program 1 times [2022-07-22 11:16:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:19,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521703478] [2022-07-22 11:16:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 11:16:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521703478] [2022-07-22 11:16:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521703478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:19,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:19,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073318943] [2022-07-22 11:16:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:19,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:19,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,579 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:19,606 INFO L93 Difference]: Finished difference Result 975 states and 1552 transitions. [2022-07-22 11:16:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-22 11:16:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:19,609 INFO L225 Difference]: With dead ends: 975 [2022-07-22 11:16:19,609 INFO L226 Difference]: Without dead ends: 655 [2022-07-22 11:16:19,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,611 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:19,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 550 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-07-22 11:16:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2022-07-22 11:16:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.584097859327217) internal successors, (1036), 654 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1036 transitions. [2022-07-22 11:16:19,625 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1036 transitions. Word has length 127 [2022-07-22 11:16:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:19,625 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 1036 transitions. [2022-07-22 11:16:19,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1036 transitions. [2022-07-22 11:16:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 11:16:19,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:19,627 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:16:19,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -88700101, now seen corresponding path program 1 times [2022-07-22 11:16:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647699541] [2022-07-22 11:16:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:16:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647699541] [2022-07-22 11:16:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647699541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:19,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:19,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497283659] [2022-07-22 11:16:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,754 INFO L87 Difference]: Start difference. First operand 655 states and 1036 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:19,782 INFO L93 Difference]: Finished difference Result 1562 states and 2482 transitions. [2022-07-22 11:16:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-22 11:16:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:19,787 INFO L225 Difference]: With dead ends: 1562 [2022-07-22 11:16:19,787 INFO L226 Difference]: Without dead ends: 928 [2022-07-22 11:16:19,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,789 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:19,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-07-22 11:16:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-07-22 11:16:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.581445523193096) internal successors, (1466), 927 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1466 transitions. [2022-07-22 11:16:19,810 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1466 transitions. Word has length 127 [2022-07-22 11:16:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:19,811 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1466 transitions. [2022-07-22 11:16:19,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1466 transitions. [2022-07-22 11:16:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 11:16:19,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:19,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:19,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:16:19,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash 859220644, now seen corresponding path program 1 times [2022-07-22 11:16:19,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:19,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041164527] [2022-07-22 11:16:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 11:16:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041164527] [2022-07-22 11:16:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041164527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:19,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:19,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085236058] [2022-07-22 11:16:19,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,911 INFO L87 Difference]: Start difference. First operand 928 states and 1466 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:19,937 INFO L93 Difference]: Finished difference Result 1862 states and 2944 transitions. [2022-07-22 11:16:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-22 11:16:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:19,941 INFO L225 Difference]: With dead ends: 1862 [2022-07-22 11:16:19,941 INFO L226 Difference]: Without dead ends: 955 [2022-07-22 11:16:19,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:19,943 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:19,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 400 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-22 11:16:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 955. [2022-07-22 11:16:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 1.5733752620545074) internal successors, (1501), 954 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1501 transitions. [2022-07-22 11:16:19,969 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1501 transitions. Word has length 128 [2022-07-22 11:16:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:19,969 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1501 transitions. [2022-07-22 11:16:19,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1501 transitions. [2022-07-22 11:16:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 11:16:19,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:19,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:19,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 11:16:19,972 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1282639834, now seen corresponding path program 1 times [2022-07-22 11:16:19,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554456355] [2022-07-22 11:16:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 11:16:20,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:20,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554456355] [2022-07-22 11:16:20,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554456355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:20,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:20,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:16:20,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002499679] [2022-07-22 11:16:20,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:16:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:16:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:20,070 INFO L87 Difference]: Start difference. First operand 955 states and 1501 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:20,089 INFO L93 Difference]: Finished difference Result 1891 states and 2980 transitions. [2022-07-22 11:16:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:16:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-22 11:16:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:20,093 INFO L225 Difference]: With dead ends: 1891 [2022-07-22 11:16:20,093 INFO L226 Difference]: Without dead ends: 957 [2022-07-22 11:16:20,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:16:20,096 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:20,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:16:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-22 11:16:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2022-07-22 11:16:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.5721757322175731) internal successors, (1503), 956 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1503 transitions. [2022-07-22 11:16:20,115 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1503 transitions. Word has length 128 [2022-07-22 11:16:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1503 transitions. [2022-07-22 11:16:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1503 transitions. [2022-07-22 11:16:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-22 11:16:20,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:20,118 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 11:16:20,118 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1581011726, now seen corresponding path program 1 times [2022-07-22 11:16:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597989443] [2022-07-22 11:16:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 211 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 11:16:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597989443] [2022-07-22 11:16:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597989443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:16:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856671910] [2022-07-22 11:16:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:16:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:16:20,268 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) [2022-07-22 11:16:20,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:16:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:16:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:16:20,967 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:16:20,968 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:16:21,014 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 11:16:21,014 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 19 treesize of output 7 [2022-07-22 11:16:21,036 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 11:16:21,036 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-22 11:16:21,075 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 [2022-07-22 11:16:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 212 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 11:16:21,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:16:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 11:16:21,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856671910] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:16:21,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:16:21,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-22 11:16:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104735824] [2022-07-22 11:16:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:21,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:21,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:16:21,157 INFO L87 Difference]: Start difference. First operand 957 states and 1503 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:23,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:23,489 INFO L93 Difference]: Finished difference Result 2165 states and 3381 transitions. [2022-07-22 11:16:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:23,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-07-22 11:16:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:23,494 INFO L225 Difference]: With dead ends: 2165 [2022-07-22 11:16:23,494 INFO L226 Difference]: Without dead ends: 1231 [2022-07-22 11:16:23,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:16:23,496 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 97 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:23,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 421 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-07-22 11:16:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1023. [2022-07-22 11:16:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.5626223091976517) internal successors, (1597), 1022 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1597 transitions. [2022-07-22 11:16:23,519 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1597 transitions. Word has length 191 [2022-07-22 11:16:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:23,519 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1597 transitions. [2022-07-22 11:16:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1597 transitions. [2022-07-22 11:16:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-22 11:16:23,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:23,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:23,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:16:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 11:16:23,735 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 893611286, now seen corresponding path program 1 times [2022-07-22 11:16:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107600186] [2022-07-22 11:16:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 11:16:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:23,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107600186] [2022-07-22 11:16:23,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107600186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:23,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:23,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:23,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96795689] [2022-07-22 11:16:23,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:23,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:23,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:23,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:23,876 INFO L87 Difference]: Start difference. First operand 1023 states and 1597 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:25,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:26,285 INFO L93 Difference]: Finished difference Result 2116 states and 3285 transitions. [2022-07-22 11:16:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-22 11:16:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:26,289 INFO L225 Difference]: With dead ends: 2116 [2022-07-22 11:16:26,289 INFO L226 Difference]: Without dead ends: 1116 [2022-07-22 11:16:26,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:26,291 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 88 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:26,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 600 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-22 11:16:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1023. [2022-07-22 11:16:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-22 11:16:26,320 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 192 [2022-07-22 11:16:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:26,320 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-22 11:16:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-22 11:16:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-22 11:16:26,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:26,323 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:26,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:16:26,323 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1597975272, now seen corresponding path program 1 times [2022-07-22 11:16:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:26,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140807527] [2022-07-22 11:16:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:26,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:26,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:26,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140807527] [2022-07-22 11:16:26,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140807527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:26,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:26,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55427145] [2022-07-22 11:16:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:26,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:26,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:26,475 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:28,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:28,864 INFO L93 Difference]: Finished difference Result 2289 states and 3557 transitions. [2022-07-22 11:16:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-07-22 11:16:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:28,869 INFO L225 Difference]: With dead ends: 2289 [2022-07-22 11:16:28,869 INFO L226 Difference]: Without dead ends: 1289 [2022-07-22 11:16:28,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:28,872 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 90 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:28,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 615 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-22 11:16:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1023. [2022-07-22 11:16:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-22 11:16:28,931 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 205 [2022-07-22 11:16:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:28,931 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-22 11:16:28,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-22 11:16:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-22 11:16:28,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:28,936 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:16:28,937 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2144107753, now seen corresponding path program 1 times [2022-07-22 11:16:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877609430] [2022-07-22 11:16:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 238 proven. 14 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-22 11:16:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877609430] [2022-07-22 11:16:29,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877609430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:16:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753024735] [2022-07-22 11:16:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:29,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:16:29,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:16:29,124 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) [2022-07-22 11:16:29,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:16:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:16:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:16:29,786 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 31 treesize of output 19 [2022-07-22 11:16:29,809 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-07-22 11:16:29,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-07-22 11:16:29,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-22 11:16:29,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-22 11:16:29,895 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 7 treesize of output 3 [2022-07-22 11:16:29,918 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-22 11:16:29,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 21 [2022-07-22 11:16:29,924 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 7 treesize of output 3 [2022-07-22 11:16:29,960 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 [2022-07-22 11:16:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-22 11:16:29,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:16:29,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753024735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:29,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:16:29,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-22 11:16:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119482798] [2022-07-22 11:16:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:29,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:16:29,973 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:31,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:32,316 INFO L93 Difference]: Finished difference Result 2247 states and 3494 transitions. [2022-07-22 11:16:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-22 11:16:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:32,321 INFO L225 Difference]: With dead ends: 2247 [2022-07-22 11:16:32,321 INFO L226 Difference]: Without dead ends: 1247 [2022-07-22 11:16:32,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:16:32,323 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 91 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:32,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 613 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-07-22 11:16:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1023. [2022-07-22 11:16:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.560665362035225) internal successors, (1595), 1022 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1595 transitions. [2022-07-22 11:16:32,350 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1595 transitions. Word has length 206 [2022-07-22 11:16:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:32,350 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1595 transitions. [2022-07-22 11:16:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1595 transitions. [2022-07-22 11:16:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-22 11:16:32,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:32,354 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:32,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:16:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:16:32,568 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1129262156, now seen corresponding path program 1 times [2022-07-22 11:16:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:32,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423147596] [2022-07-22 11:16:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:32,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423147596] [2022-07-22 11:16:32,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423147596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:32,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006784979] [2022-07-22 11:16:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:32,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:32,723 INFO L87 Difference]: Start difference. First operand 1023 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:34,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:35,076 INFO L93 Difference]: Finished difference Result 2276 states and 3537 transitions. [2022-07-22 11:16:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-22 11:16:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:35,080 INFO L225 Difference]: With dead ends: 2276 [2022-07-22 11:16:35,080 INFO L226 Difference]: Without dead ends: 1276 [2022-07-22 11:16:35,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:35,081 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 82 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:35,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 603 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-07-22 11:16:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1092. [2022-07-22 11:16:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5554537121906509) internal successors, (1697), 1091 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1697 transitions. [2022-07-22 11:16:35,105 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1697 transitions. Word has length 206 [2022-07-22 11:16:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:35,105 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1697 transitions. [2022-07-22 11:16:35,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1697 transitions. [2022-07-22 11:16:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-22 11:16:35,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:35,116 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:16:35,116 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash 402251252, now seen corresponding path program 1 times [2022-07-22 11:16:35,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:35,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523245407] [2022-07-22 11:16:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523245407] [2022-07-22 11:16:35,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523245407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:35,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:35,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896623309] [2022-07-22 11:16:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:35,272 INFO L87 Difference]: Start difference. First operand 1092 states and 1697 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:37,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:37,622 INFO L93 Difference]: Finished difference Result 2254 states and 3485 transitions. [2022-07-22 11:16:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-07-22 11:16:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:37,626 INFO L225 Difference]: With dead ends: 2254 [2022-07-22 11:16:37,627 INFO L226 Difference]: Without dead ends: 1185 [2022-07-22 11:16:37,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:37,628 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 97 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:37,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 598 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-22 11:16:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-22 11:16:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5536205316223648) internal successors, (1695), 1091 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1695 transitions. [2022-07-22 11:16:37,651 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1695 transitions. Word has length 207 [2022-07-22 11:16:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:37,652 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1695 transitions. [2022-07-22 11:16:37,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1695 transitions. [2022-07-22 11:16:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-22 11:16:37,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:37,655 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:16:37,655 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1128334472, now seen corresponding path program 1 times [2022-07-22 11:16:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899111711] [2022-07-22 11:16:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:37,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899111711] [2022-07-22 11:16:37,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899111711] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:37,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:37,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:37,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217311769] [2022-07-22 11:16:37,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:37,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:37,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:37,795 INFO L87 Difference]: Start difference. First operand 1092 states and 1695 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:39,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:40,110 INFO L93 Difference]: Finished difference Result 2254 states and 3481 transitions. [2022-07-22 11:16:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-07-22 11:16:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:40,114 INFO L225 Difference]: With dead ends: 2254 [2022-07-22 11:16:40,114 INFO L226 Difference]: Without dead ends: 1185 [2022-07-22 11:16:40,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:40,116 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 90 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:40,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 596 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-22 11:16:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1092. [2022-07-22 11:16:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5517873510540787) internal successors, (1693), 1091 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1693 transitions. [2022-07-22 11:16:40,155 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1693 transitions. Word has length 208 [2022-07-22 11:16:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:40,155 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1693 transitions. [2022-07-22 11:16:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1693 transitions. [2022-07-22 11:16:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-22 11:16:40,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:40,158 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:40,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 11:16:40,159 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1932227823, now seen corresponding path program 1 times [2022-07-22 11:16:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:40,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851815813] [2022-07-22 11:16:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:40,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851815813] [2022-07-22 11:16:40,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851815813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:40,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:40,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904999616] [2022-07-22 11:16:40,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:40,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:40,279 INFO L87 Difference]: Start difference. First operand 1092 states and 1693 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:42,588 INFO L93 Difference]: Finished difference Result 2234 states and 3451 transitions. [2022-07-22 11:16:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-22 11:16:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:42,591 INFO L225 Difference]: With dead ends: 2234 [2022-07-22 11:16:42,591 INFO L226 Difference]: Without dead ends: 1165 [2022-07-22 11:16:42,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:42,593 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 86 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:42,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 582 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-22 11:16:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-22 11:16:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5499541704857929) internal successors, (1691), 1091 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1691 transitions. [2022-07-22 11:16:42,615 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1691 transitions. Word has length 209 [2022-07-22 11:16:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:42,616 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1691 transitions. [2022-07-22 11:16:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1691 transitions. [2022-07-22 11:16:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-22 11:16:42,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:42,619 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-22 11:16:42,619 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:42,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1406253003, now seen corresponding path program 1 times [2022-07-22 11:16:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583182182] [2022-07-22 11:16:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583182182] [2022-07-22 11:16:42,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583182182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:42,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:42,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317185943] [2022-07-22 11:16:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:42,772 INFO L87 Difference]: Start difference. First operand 1092 states and 1691 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:44,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:44,288 INFO L93 Difference]: Finished difference Result 2234 states and 3447 transitions. [2022-07-22 11:16:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-22 11:16:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:44,292 INFO L225 Difference]: With dead ends: 2234 [2022-07-22 11:16:44,292 INFO L226 Difference]: Without dead ends: 1165 [2022-07-22 11:16:44,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:44,294 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 80 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:44,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 580 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:16:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-07-22 11:16:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1092. [2022-07-22 11:16:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.5481209899175068) internal successors, (1689), 1091 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1689 transitions. [2022-07-22 11:16:44,334 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1689 transitions. Word has length 209 [2022-07-22 11:16:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:44,334 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1689 transitions. [2022-07-22 11:16:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1689 transitions. [2022-07-22 11:16:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-22 11:16:44,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:44,337 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:44,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 11:16:44,338 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash 266712989, now seen corresponding path program 1 times [2022-07-22 11:16:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:44,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531213727] [2022-07-22 11:16:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:44,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531213727] [2022-07-22 11:16:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531213727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:44,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:44,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493429281] [2022-07-22 11:16:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:44,473 INFO L87 Difference]: Start difference. First operand 1092 states and 1689 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:45,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:46,293 INFO L93 Difference]: Finished difference Result 2227 states and 3435 transitions. [2022-07-22 11:16:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:46,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-07-22 11:16:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:46,297 INFO L225 Difference]: With dead ends: 2227 [2022-07-22 11:16:46,297 INFO L226 Difference]: Without dead ends: 1158 [2022-07-22 11:16:46,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:46,299 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 76 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:46,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 574 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 11:16:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-07-22 11:16:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1092. [2022-07-22 11:16:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.546287809349221) internal successors, (1687), 1091 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1687 transitions. [2022-07-22 11:16:46,319 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1687 transitions. Word has length 210 [2022-07-22 11:16:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:46,320 INFO L495 AbstractCegarLoop]: Abstraction has 1092 states and 1687 transitions. [2022-07-22 11:16:46,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1687 transitions. [2022-07-22 11:16:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-22 11:16:46,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:46,323 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:46,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-22 11:16:46,323 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 166579950, now seen corresponding path program 1 times [2022-07-22 11:16:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:46,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610274070] [2022-07-22 11:16:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:46,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610274070] [2022-07-22 11:16:46,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610274070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:46,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:46,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:46,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187346009] [2022-07-22 11:16:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:46,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:46,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:46,446 INFO L87 Difference]: Start difference. First operand 1092 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:48,797 INFO L93 Difference]: Finished difference Result 2444 states and 3751 transitions. [2022-07-22 11:16:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-07-22 11:16:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:48,802 INFO L225 Difference]: With dead ends: 2444 [2022-07-22 11:16:48,802 INFO L226 Difference]: Without dead ends: 1375 [2022-07-22 11:16:48,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:48,804 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:48,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-07-22 11:16:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1140. [2022-07-22 11:16:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5364354697102722) internal successors, (1750), 1139 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1750 transitions. [2022-07-22 11:16:48,827 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1750 transitions. Word has length 214 [2022-07-22 11:16:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:48,828 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1750 transitions. [2022-07-22 11:16:48,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1750 transitions. [2022-07-22 11:16:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-22 11:16:48,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:48,831 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:48,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-22 11:16:48,831 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:48,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1870434490, now seen corresponding path program 1 times [2022-07-22 11:16:48,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:48,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677678180] [2022-07-22 11:16:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:48,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677678180] [2022-07-22 11:16:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677678180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:49,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:49,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525277668] [2022-07-22 11:16:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:49,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:49,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:49,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:49,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:49,004 INFO L87 Difference]: Start difference. First operand 1140 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:51,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:51,285 INFO L93 Difference]: Finished difference Result 2315 states and 3547 transitions. [2022-07-22 11:16:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-07-22 11:16:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:51,289 INFO L225 Difference]: With dead ends: 2315 [2022-07-22 11:16:51,289 INFO L226 Difference]: Without dead ends: 1198 [2022-07-22 11:16:51,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:51,291 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 66 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:51,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 564 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-22 11:16:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-22 11:16:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5346795434591747) internal successors, (1748), 1139 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1748 transitions. [2022-07-22 11:16:51,315 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1748 transitions. Word has length 215 [2022-07-22 11:16:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1748 transitions. [2022-07-22 11:16:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1748 transitions. [2022-07-22 11:16:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-22 11:16:51,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:51,320 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:51,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-22 11:16:51,320 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1365737855, now seen corresponding path program 1 times [2022-07-22 11:16:51,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:51,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517586225] [2022-07-22 11:16:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:51,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517586225] [2022-07-22 11:16:51,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517586225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:51,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616748372] [2022-07-22 11:16:51,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:51,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:51,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:51,470 INFO L87 Difference]: Start difference. First operand 1140 states and 1748 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:53,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:53,744 INFO L93 Difference]: Finished difference Result 2315 states and 3543 transitions. [2022-07-22 11:16:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-07-22 11:16:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:53,747 INFO L225 Difference]: With dead ends: 2315 [2022-07-22 11:16:53,747 INFO L226 Difference]: Without dead ends: 1198 [2022-07-22 11:16:53,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:53,748 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 62 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:53,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 562 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:16:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-07-22 11:16:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1140. [2022-07-22 11:16:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5329236172080773) internal successors, (1746), 1139 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1746 transitions. [2022-07-22 11:16:53,769 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1746 transitions. Word has length 217 [2022-07-22 11:16:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:53,769 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1746 transitions. [2022-07-22 11:16:53,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1746 transitions. [2022-07-22 11:16:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-22 11:16:53,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:53,772 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-22 11:16:53,772 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1697536105, now seen corresponding path program 1 times [2022-07-22 11:16:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:53,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907060060] [2022-07-22 11:16:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:16:53,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907060060] [2022-07-22 11:16:53,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907060060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:53,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:53,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:53,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207672146] [2022-07-22 11:16:53,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:53,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:53,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:53,904 INFO L87 Difference]: Start difference. First operand 1140 states and 1746 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:55,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:56,304 INFO L93 Difference]: Finished difference Result 2456 states and 3729 transitions. [2022-07-22 11:16:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:56,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-22 11:16:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:56,307 INFO L225 Difference]: With dead ends: 2456 [2022-07-22 11:16:56,308 INFO L226 Difference]: Without dead ends: 1339 [2022-07-22 11:16:56,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:56,309 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:56,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:16:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-07-22 11:16:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1140. [2022-07-22 11:16:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5232660228270412) internal successors, (1735), 1139 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1735 transitions. [2022-07-22 11:16:56,333 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1735 transitions. Word has length 218 [2022-07-22 11:16:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1735 transitions. [2022-07-22 11:16:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1735 transitions. [2022-07-22 11:16:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-22 11:16:56,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:56,336 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:56,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-22 11:16:56,336 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1226059139, now seen corresponding path program 1 times [2022-07-22 11:16:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:56,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300555406] [2022-07-22 11:16:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:56,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:56,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:56,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300555406] [2022-07-22 11:16:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300555406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:56,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:56,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:56,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057932188] [2022-07-22 11:16:56,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:56,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:56,492 INFO L87 Difference]: Start difference. First operand 1140 states and 1735 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:58,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:16:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:16:58,749 INFO L93 Difference]: Finished difference Result 2299 states and 3491 transitions. [2022-07-22 11:16:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:16:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-07-22 11:16:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:16:58,750 INFO L225 Difference]: With dead ends: 2299 [2022-07-22 11:16:58,750 INFO L226 Difference]: Without dead ends: 1182 [2022-07-22 11:16:58,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:16:58,752 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 49 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:16:58,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 550 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:16:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-22 11:16:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1140. [2022-07-22 11:16:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5215100965759438) internal successors, (1733), 1139 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1733 transitions. [2022-07-22 11:16:58,774 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1733 transitions. Word has length 218 [2022-07-22 11:16:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:16:58,775 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1733 transitions. [2022-07-22 11:16:58,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:16:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1733 transitions. [2022-07-22 11:16:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-22 11:16:58,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:16:58,777 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:16:58,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-22 11:16:58,778 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:16:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:16:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 306712821, now seen corresponding path program 1 times [2022-07-22 11:16:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:16:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997836699] [2022-07-22 11:16:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:16:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:16:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:16:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:16:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:16:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997836699] [2022-07-22 11:16:59,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997836699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:16:59,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:16:59,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:16:59,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368183627] [2022-07-22 11:16:59,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:16:59,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:16:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:16:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:16:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:16:59,036 INFO L87 Difference]: Start difference. First operand 1140 states and 1733 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:00,244 INFO L93 Difference]: Finished difference Result 2295 states and 3483 transitions. [2022-07-22 11:17:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-07-22 11:17:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:00,246 INFO L225 Difference]: With dead ends: 2295 [2022-07-22 11:17:00,246 INFO L226 Difference]: Without dead ends: 1178 [2022-07-22 11:17:00,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:00,248 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:00,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 546 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 11:17:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-22 11:17:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-22 11:17:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5197541703248463) internal successors, (1731), 1139 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1731 transitions. [2022-07-22 11:17:00,300 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1731 transitions. Word has length 219 [2022-07-22 11:17:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:00,300 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1731 transitions. [2022-07-22 11:17:00,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1731 transitions. [2022-07-22 11:17:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-22 11:17:00,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:00,303 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:00,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-22 11:17:00,303 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash -331325385, now seen corresponding path program 1 times [2022-07-22 11:17:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:00,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790581035] [2022-07-22 11:17:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790581035] [2022-07-22 11:17:00,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790581035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:00,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:00,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:00,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874422988] [2022-07-22 11:17:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:00,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:00,441 INFO L87 Difference]: Start difference. First operand 1140 states and 1731 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:02,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:02,675 INFO L93 Difference]: Finished difference Result 2295 states and 3479 transitions. [2022-07-22 11:17:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2022-07-22 11:17:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:02,677 INFO L225 Difference]: With dead ends: 2295 [2022-07-22 11:17:02,677 INFO L226 Difference]: Without dead ends: 1178 [2022-07-22 11:17:02,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:02,679 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 50 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:02,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 544 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-07-22 11:17:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1140. [2022-07-22 11:17:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.517998244073749) internal successors, (1729), 1139 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1729 transitions. [2022-07-22 11:17:02,702 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1729 transitions. Word has length 220 [2022-07-22 11:17:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:02,702 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1729 transitions. [2022-07-22 11:17:02,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1729 transitions. [2022-07-22 11:17:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 11:17:02,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:02,705 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:02,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-22 11:17:02,705 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1004342270, now seen corresponding path program 1 times [2022-07-22 11:17:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406805118] [2022-07-22 11:17:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:02,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406805118] [2022-07-22 11:17:02,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406805118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:02,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:02,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100327612] [2022-07-22 11:17:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:02,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:02,851 INFO L87 Difference]: Start difference. First operand 1140 states and 1729 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:04,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:05,153 INFO L93 Difference]: Finished difference Result 2441 states and 3694 transitions. [2022-07-22 11:17:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-07-22 11:17:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:05,156 INFO L225 Difference]: With dead ends: 2441 [2022-07-22 11:17:05,156 INFO L226 Difference]: Without dead ends: 1324 [2022-07-22 11:17:05,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:05,157 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 89 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:05,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 597 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-22 11:17:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-22 11:17:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5153643546971027) internal successors, (1726), 1139 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1726 transitions. [2022-07-22 11:17:05,183 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1726 transitions. Word has length 221 [2022-07-22 11:17:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:05,183 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1726 transitions. [2022-07-22 11:17:05,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1726 transitions. [2022-07-22 11:17:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 11:17:05,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:05,186 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:05,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-22 11:17:05,186 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:05,187 INFO L85 PathProgramCache]: Analyzing trace with hash -855690769, now seen corresponding path program 1 times [2022-07-22 11:17:05,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:05,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085651957] [2022-07-22 11:17:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:05,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085651957] [2022-07-22 11:17:05,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085651957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:05,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:05,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159246499] [2022-07-22 11:17:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:05,323 INFO L87 Difference]: Start difference. First operand 1140 states and 1726 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:07,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:07,555 INFO L93 Difference]: Finished difference Result 2291 states and 3463 transitions. [2022-07-22 11:17:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2022-07-22 11:17:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:07,557 INFO L225 Difference]: With dead ends: 2291 [2022-07-22 11:17:07,557 INFO L226 Difference]: Without dead ends: 1174 [2022-07-22 11:17:07,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:07,562 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 47 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:07,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 542 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-07-22 11:17:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1140. [2022-07-22 11:17:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5136084284460052) internal successors, (1724), 1139 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1724 transitions. [2022-07-22 11:17:07,584 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1724 transitions. Word has length 221 [2022-07-22 11:17:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:07,584 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1724 transitions. [2022-07-22 11:17:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1724 transitions. [2022-07-22 11:17:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-22 11:17:07,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:07,587 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:07,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-22 11:17:07,587 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash 356617902, now seen corresponding path program 1 times [2022-07-22 11:17:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:07,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74640403] [2022-07-22 11:17:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74640403] [2022-07-22 11:17:07,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74640403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:07,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:07,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591146899] [2022-07-22 11:17:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:07,747 INFO L87 Difference]: Start difference. First operand 1140 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:09,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:10,058 INFO L93 Difference]: Finished difference Result 2441 states and 3684 transitions. [2022-07-22 11:17:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-22 11:17:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:10,060 INFO L225 Difference]: With dead ends: 2441 [2022-07-22 11:17:10,060 INFO L226 Difference]: Without dead ends: 1324 [2022-07-22 11:17:10,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:10,062 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 82 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:10,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 595 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-07-22 11:17:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1140. [2022-07-22 11:17:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.5109745390693592) internal successors, (1721), 1139 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1721 transitions. [2022-07-22 11:17:10,082 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1721 transitions. Word has length 222 [2022-07-22 11:17:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:10,082 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1721 transitions. [2022-07-22 11:17:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1721 transitions. [2022-07-22 11:17:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-22 11:17:10,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:10,084 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:10,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-22 11:17:10,084 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2141757129, now seen corresponding path program 1 times [2022-07-22 11:17:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070818438] [2022-07-22 11:17:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:17:10,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070818438] [2022-07-22 11:17:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070818438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:10,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:10,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:10,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551439467] [2022-07-22 11:17:10,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:10,198 INFO L87 Difference]: Start difference. First operand 1140 states and 1721 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:12,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:12,538 INFO L93 Difference]: Finished difference Result 2582 states and 3889 transitions. [2022-07-22 11:17:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-07-22 11:17:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:12,541 INFO L225 Difference]: With dead ends: 2582 [2022-07-22 11:17:12,541 INFO L226 Difference]: Without dead ends: 1465 [2022-07-22 11:17:12,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:12,542 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 113 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:12,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-07-22 11:17:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1239. [2022-07-22 11:17:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5145395799676897) internal successors, (1875), 1238 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1875 transitions. [2022-07-22 11:17:12,568 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1875 transitions. Word has length 222 [2022-07-22 11:17:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:12,568 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1875 transitions. [2022-07-22 11:17:12,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1875 transitions. [2022-07-22 11:17:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-22 11:17:12,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:12,571 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:12,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-22 11:17:12,571 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash 721111161, now seen corresponding path program 1 times [2022-07-22 11:17:12,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:12,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518049380] [2022-07-22 11:17:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:12,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518049380] [2022-07-22 11:17:12,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518049380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:12,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:12,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:12,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215120158] [2022-07-22 11:17:12,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:12,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:12,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:12,691 INFO L87 Difference]: Start difference. First operand 1239 states and 1875 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:14,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:14,966 INFO L93 Difference]: Finished difference Result 2609 states and 3944 transitions. [2022-07-22 11:17:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-07-22 11:17:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:14,970 INFO L225 Difference]: With dead ends: 2609 [2022-07-22 11:17:14,970 INFO L226 Difference]: Without dead ends: 1393 [2022-07-22 11:17:14,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:14,972 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 77 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:14,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 579 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-22 11:17:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-22 11:17:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5121163166397416) internal successors, (1872), 1238 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1872 transitions. [2022-07-22 11:17:15,018 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1872 transitions. Word has length 223 [2022-07-22 11:17:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:15,018 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1872 transitions. [2022-07-22 11:17:15,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1872 transitions. [2022-07-22 11:17:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-22 11:17:15,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:15,020 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:15,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-22 11:17:15,020 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1677597631, now seen corresponding path program 1 times [2022-07-22 11:17:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:15,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052874554] [2022-07-22 11:17:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052874554] [2022-07-22 11:17:15,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052874554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:15,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:15,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470949059] [2022-07-22 11:17:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:15,146 INFO L87 Difference]: Start difference. First operand 1239 states and 1872 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:16,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:17,121 INFO L93 Difference]: Finished difference Result 2609 states and 3938 transitions. [2022-07-22 11:17:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-07-22 11:17:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:17,123 INFO L225 Difference]: With dead ends: 2609 [2022-07-22 11:17:17,123 INFO L226 Difference]: Without dead ends: 1393 [2022-07-22 11:17:17,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:17,125 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:17,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 577 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 11:17:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-07-22 11:17:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1239. [2022-07-22 11:17:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5096930533117932) internal successors, (1869), 1238 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1869 transitions. [2022-07-22 11:17:17,154 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1869 transitions. Word has length 223 [2022-07-22 11:17:17,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:17,154 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1869 transitions. [2022-07-22 11:17:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1869 transitions. [2022-07-22 11:17:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-22 11:17:17,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:17,158 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:17,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-22 11:17:17,160 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -265663596, now seen corresponding path program 1 times [2022-07-22 11:17:17,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:17,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840905817] [2022-07-22 11:17:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 11:17:17,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840905817] [2022-07-22 11:17:17,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840905817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:17,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:17,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299533871] [2022-07-22 11:17:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:17,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:17,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:17,277 INFO L87 Difference]: Start difference. First operand 1239 states and 1869 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:19,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:19,512 INFO L93 Difference]: Finished difference Result 2481 states and 3739 transitions. [2022-07-22 11:17:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-07-22 11:17:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:19,514 INFO L225 Difference]: With dead ends: 2481 [2022-07-22 11:17:19,514 INFO L226 Difference]: Without dead ends: 1265 [2022-07-22 11:17:19,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:19,515 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 35 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:19,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 532 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-22 11:17:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-22 11:17:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5080775444264944) internal successors, (1867), 1238 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1867 transitions. [2022-07-22 11:17:19,544 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1867 transitions. Word has length 223 [2022-07-22 11:17:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:19,544 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1867 transitions. [2022-07-22 11:17:19,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1867 transitions. [2022-07-22 11:17:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-22 11:17:19,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:19,547 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-22 11:17:19,547 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1376802131, now seen corresponding path program 1 times [2022-07-22 11:17:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427873517] [2022-07-22 11:17:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:19,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:19,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427873517] [2022-07-22 11:17:19,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427873517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:19,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:19,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146102470] [2022-07-22 11:17:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:19,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:19,666 INFO L87 Difference]: Start difference. First operand 1239 states and 1867 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:21,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:21,950 INFO L93 Difference]: Finished difference Result 2599 states and 3917 transitions. [2022-07-22 11:17:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-07-22 11:17:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:21,953 INFO L225 Difference]: With dead ends: 2599 [2022-07-22 11:17:21,954 INFO L226 Difference]: Without dead ends: 1383 [2022-07-22 11:17:21,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:21,955 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 67 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 571 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-07-22 11:17:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1239. [2022-07-22 11:17:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.505654281098546) internal successors, (1864), 1238 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1864 transitions. [2022-07-22 11:17:21,985 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1864 transitions. Word has length 224 [2022-07-22 11:17:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:21,986 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1864 transitions. [2022-07-22 11:17:21,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1864 transitions. [2022-07-22 11:17:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-22 11:17:21,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:21,988 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-22 11:17:21,989 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -473713383, now seen corresponding path program 1 times [2022-07-22 11:17:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117538009] [2022-07-22 11:17:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:21,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:22,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:22,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117538009] [2022-07-22 11:17:22,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117538009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:22,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:22,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208111462] [2022-07-22 11:17:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:22,133 INFO L87 Difference]: Start difference. First operand 1239 states and 1864 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:24,374 INFO L93 Difference]: Finished difference Result 2481 states and 3729 transitions. [2022-07-22 11:17:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-07-22 11:17:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:24,376 INFO L225 Difference]: With dead ends: 2481 [2022-07-22 11:17:24,376 INFO L226 Difference]: Without dead ends: 1265 [2022-07-22 11:17:24,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:24,378 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 33 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:24,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 530 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-07-22 11:17:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-07-22 11:17:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.504038772213247) internal successors, (1862), 1238 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1862 transitions. [2022-07-22 11:17:24,400 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1862 transitions. Word has length 224 [2022-07-22 11:17:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:24,401 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1862 transitions. [2022-07-22 11:17:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1862 transitions. [2022-07-22 11:17:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-22 11:17:24,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:24,403 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-22 11:17:24,404 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1378487510, now seen corresponding path program 1 times [2022-07-22 11:17:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:24,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324248772] [2022-07-22 11:17:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:24,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324248772] [2022-07-22 11:17:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324248772] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:24,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:24,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11328203] [2022-07-22 11:17:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:24,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:24,523 INFO L87 Difference]: Start difference. First operand 1239 states and 1862 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:26,751 INFO L93 Difference]: Finished difference Result 2477 states and 3721 transitions. [2022-07-22 11:17:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-07-22 11:17:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:26,753 INFO L225 Difference]: With dead ends: 2477 [2022-07-22 11:17:26,753 INFO L226 Difference]: Without dead ends: 1261 [2022-07-22 11:17:26,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:26,755 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:26,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 526 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-07-22 11:17:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1239. [2022-07-22 11:17:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.5024232633279484) internal successors, (1860), 1238 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1860 transitions. [2022-07-22 11:17:26,786 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1860 transitions. Word has length 225 [2022-07-22 11:17:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:26,786 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1860 transitions. [2022-07-22 11:17:26,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1860 transitions. [2022-07-22 11:17:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-22 11:17:26,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:26,789 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-22 11:17:26,789 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash 995473950, now seen corresponding path program 1 times [2022-07-22 11:17:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:26,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906106211] [2022-07-22 11:17:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:26,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906106211] [2022-07-22 11:17:26,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906106211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:26,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:26,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356350536] [2022-07-22 11:17:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:26,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:26,948 INFO L87 Difference]: Start difference. First operand 1239 states and 1860 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:28,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:29,270 INFO L93 Difference]: Finished difference Result 2780 states and 4158 transitions. [2022-07-22 11:17:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2022-07-22 11:17:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:29,272 INFO L225 Difference]: With dead ends: 2780 [2022-07-22 11:17:29,272 INFO L226 Difference]: Without dead ends: 1564 [2022-07-22 11:17:29,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:29,274 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 109 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:29,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 304 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-07-22 11:17:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1350. [2022-07-22 11:17:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.5040770941438102) internal successors, (2029), 1349 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2029 transitions. [2022-07-22 11:17:29,306 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2029 transitions. Word has length 226 [2022-07-22 11:17:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:29,307 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2029 transitions. [2022-07-22 11:17:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2029 transitions. [2022-07-22 11:17:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-22 11:17:29,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:29,310 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:29,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-22 11:17:29,310 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1361684283, now seen corresponding path program 1 times [2022-07-22 11:17:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:29,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942363920] [2022-07-22 11:17:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:29,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942363920] [2022-07-22 11:17:29,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942363920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:29,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:29,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:29,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498866757] [2022-07-22 11:17:29,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:29,436 INFO L87 Difference]: Start difference. First operand 1350 states and 2029 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:31,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:31,667 INFO L93 Difference]: Finished difference Result 2695 states and 4051 transitions. [2022-07-22 11:17:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:31,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-07-22 11:17:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:31,670 INFO L225 Difference]: With dead ends: 2695 [2022-07-22 11:17:31,670 INFO L226 Difference]: Without dead ends: 1368 [2022-07-22 11:17:31,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:31,672 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 25 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:31,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 520 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-07-22 11:17:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1350. [2022-07-22 11:17:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.502594514455152) internal successors, (2027), 1349 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2027 transitions. [2022-07-22 11:17:31,706 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2027 transitions. Word has length 227 [2022-07-22 11:17:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:31,706 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2027 transitions. [2022-07-22 11:17:31,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2027 transitions. [2022-07-22 11:17:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-22 11:17:31,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:31,709 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-22 11:17:31,709 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash 939848528, now seen corresponding path program 1 times [2022-07-22 11:17:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540217531] [2022-07-22 11:17:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 11:17:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540217531] [2022-07-22 11:17:31,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540217531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:31,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:31,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337660896] [2022-07-22 11:17:31,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:31,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:31,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:31,832 INFO L87 Difference]: Start difference. First operand 1350 states and 2027 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:33,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:34,108 INFO L93 Difference]: Finished difference Result 2809 states and 4219 transitions. [2022-07-22 11:17:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-07-22 11:17:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:34,110 INFO L225 Difference]: With dead ends: 2809 [2022-07-22 11:17:34,111 INFO L226 Difference]: Without dead ends: 1482 [2022-07-22 11:17:34,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:34,112 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:34,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 561 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-07-22 11:17:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1356. [2022-07-22 11:17:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.500369003690037) internal successors, (2033), 1355 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2033 transitions. [2022-07-22 11:17:34,140 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2033 transitions. Word has length 229 [2022-07-22 11:17:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:34,140 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 2033 transitions. [2022-07-22 11:17:34,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2033 transitions. [2022-07-22 11:17:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-22 11:17:34,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:34,142 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:34,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-22 11:17:34,143 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:34,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1215121339, now seen corresponding path program 1 times [2022-07-22 11:17:34,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:34,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452352334] [2022-07-22 11:17:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:34,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452352334] [2022-07-22 11:17:34,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452352334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:34,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:34,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443373045] [2022-07-22 11:17:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:34,269 INFO L87 Difference]: Start difference. First operand 1356 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:36,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:36,605 INFO L93 Difference]: Finished difference Result 3113 states and 4660 transitions. [2022-07-22 11:17:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-07-22 11:17:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:36,607 INFO L225 Difference]: With dead ends: 3113 [2022-07-22 11:17:36,607 INFO L226 Difference]: Without dead ends: 1780 [2022-07-22 11:17:36,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:36,608 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 107 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:36,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 306 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-22 11:17:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1572. [2022-07-22 11:17:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 1.5085932527052832) internal successors, (2370), 1571 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2370 transitions. [2022-07-22 11:17:36,636 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2370 transitions. Word has length 230 [2022-07-22 11:17:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:36,636 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2370 transitions. [2022-07-22 11:17:36,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2370 transitions. [2022-07-22 11:17:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-22 11:17:36,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:36,638 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-22 11:17:36,638 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2076780555, now seen corresponding path program 1 times [2022-07-22 11:17:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:36,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412070181] [2022-07-22 11:17:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 11:17:36,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412070181] [2022-07-22 11:17:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412070181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:36,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:36,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362307374] [2022-07-22 11:17:36,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:36,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:36,754 INFO L87 Difference]: Start difference. First operand 1572 states and 2370 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:38,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:39,015 INFO L93 Difference]: Finished difference Result 3223 states and 4854 transitions. [2022-07-22 11:17:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:39,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-22 11:17:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:39,017 INFO L225 Difference]: With dead ends: 3223 [2022-07-22 11:17:39,017 INFO L226 Difference]: Without dead ends: 1674 [2022-07-22 11:17:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:39,019 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 43 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:39,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 549 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-07-22 11:17:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1581. [2022-07-22 11:17:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.509493670886076) internal successors, (2385), 1580 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2385 transitions. [2022-07-22 11:17:39,072 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2385 transitions. Word has length 231 [2022-07-22 11:17:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:39,072 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2385 transitions. [2022-07-22 11:17:39,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2385 transitions. [2022-07-22 11:17:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-22 11:17:39,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:39,075 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-22 11:17:39,076 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 168015746, now seen corresponding path program 1 times [2022-07-22 11:17:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449352877] [2022-07-22 11:17:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 11:17:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449352877] [2022-07-22 11:17:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449352877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:39,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:39,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491647422] [2022-07-22 11:17:39,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:39,196 INFO L87 Difference]: Start difference. First operand 1581 states and 2385 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:41,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:41,513 INFO L93 Difference]: Finished difference Result 3338 states and 5007 transitions. [2022-07-22 11:17:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-07-22 11:17:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:41,515 INFO L225 Difference]: With dead ends: 3338 [2022-07-22 11:17:41,516 INFO L226 Difference]: Without dead ends: 1780 [2022-07-22 11:17:41,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:41,517 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 106 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:41,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 304 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:17:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-07-22 11:17:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1581. [2022-07-22 11:17:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.5044303797468355) internal successors, (2377), 1580 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2377 transitions. [2022-07-22 11:17:41,546 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2377 transitions. Word has length 231 [2022-07-22 11:17:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:41,547 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2377 transitions. [2022-07-22 11:17:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2377 transitions. [2022-07-22 11:17:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-22 11:17:41,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:41,549 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:41,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-22 11:17:41,549 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:41,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1882170829, now seen corresponding path program 1 times [2022-07-22 11:17:41,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:41,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543565500] [2022-07-22 11:17:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:41,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543565500] [2022-07-22 11:17:41,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543565500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:41,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:41,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579243258] [2022-07-22 11:17:41,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:41,669 INFO L87 Difference]: Start difference. First operand 1581 states and 2377 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:42,738 INFO L93 Difference]: Finished difference Result 3223 states and 4835 transitions. [2022-07-22 11:17:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-07-22 11:17:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:42,740 INFO L225 Difference]: With dead ends: 3223 [2022-07-22 11:17:42,740 INFO L226 Difference]: Without dead ends: 1665 [2022-07-22 11:17:42,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:42,742 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:42,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 543 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:17:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-07-22 11:17:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1587. [2022-07-22 11:17:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.5025220680958387) internal successors, (2383), 1586 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2383 transitions. [2022-07-22 11:17:42,787 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2383 transitions. Word has length 232 [2022-07-22 11:17:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:42,787 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2383 transitions. [2022-07-22 11:17:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2383 transitions. [2022-07-22 11:17:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-22 11:17:42,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:42,790 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-22 11:17:42,791 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1442086911, now seen corresponding path program 1 times [2022-07-22 11:17:42,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726680414] [2022-07-22 11:17:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 11:17:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:42,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726680414] [2022-07-22 11:17:42,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726680414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:42,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:42,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:42,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282329102] [2022-07-22 11:17:42,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:42,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:42,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:42,916 INFO L87 Difference]: Start difference. First operand 1587 states and 2383 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:44,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:45,165 INFO L93 Difference]: Finished difference Result 3223 states and 4832 transitions. [2022-07-22 11:17:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2022-07-22 11:17:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:45,167 INFO L225 Difference]: With dead ends: 3223 [2022-07-22 11:17:45,167 INFO L226 Difference]: Without dead ends: 1659 [2022-07-22 11:17:45,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:45,168 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 34 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:45,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 539 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-22 11:17:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-22 11:17:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.5015733165512901) internal successors, (2386), 1589 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2386 transitions. [2022-07-22 11:17:45,194 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2386 transitions. Word has length 233 [2022-07-22 11:17:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:45,194 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2386 transitions. [2022-07-22 11:17:45,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2386 transitions. [2022-07-22 11:17:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-22 11:17:45,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:45,197 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:45,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-22 11:17:45,197 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash 505533037, now seen corresponding path program 1 times [2022-07-22 11:17:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:45,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070203930] [2022-07-22 11:17:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 11:17:45,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070203930] [2022-07-22 11:17:45,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070203930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:45,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:45,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:45,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770697844] [2022-07-22 11:17:45,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:45,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:45,306 INFO L87 Difference]: Start difference. First operand 1590 states and 2386 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:47,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:47,554 INFO L93 Difference]: Finished difference Result 3226 states and 4832 transitions. [2022-07-22 11:17:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:17:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-22 11:17:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:47,556 INFO L225 Difference]: With dead ends: 3226 [2022-07-22 11:17:47,556 INFO L226 Difference]: Without dead ends: 1659 [2022-07-22 11:17:47,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:47,558 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 38 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:47,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 537 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:17:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-22 11:17:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1590. [2022-07-22 11:17:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.499685336689742) internal successors, (2383), 1589 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2383 transitions. [2022-07-22 11:17:47,592 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2383 transitions. Word has length 234 [2022-07-22 11:17:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:47,593 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 2383 transitions. [2022-07-22 11:17:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2383 transitions. [2022-07-22 11:17:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-22 11:17:47,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:47,595 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:47,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-22 11:17:47,596 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash 198969349, now seen corresponding path program 1 times [2022-07-22 11:17:47,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043187753] [2022-07-22 11:17:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:47,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:17:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:47,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043187753] [2022-07-22 11:17:47,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043187753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:47,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:47,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:17:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177917696] [2022-07-22 11:17:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:47,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:17:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:17:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:17:47,956 INFO L87 Difference]: Start difference. First operand 1590 states and 2383 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:49,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:50,493 INFO L93 Difference]: Finished difference Result 3581 states and 5320 transitions. [2022-07-22 11:17:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:17:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-22 11:17:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:50,497 INFO L225 Difference]: With dead ends: 3581 [2022-07-22 11:17:50,497 INFO L226 Difference]: Without dead ends: 2014 [2022-07-22 11:17:50,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:17:50,499 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 269 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:50,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 645 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 11:17:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-07-22 11:17:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1656. [2022-07-22 11:17:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 1.4978851963746223) internal successors, (2479), 1655 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2479 transitions. [2022-07-22 11:17:50,550 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2479 transitions. Word has length 234 [2022-07-22 11:17:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:50,550 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2479 transitions. [2022-07-22 11:17:50,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2479 transitions. [2022-07-22 11:17:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-22 11:17:50,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:50,553 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-22 11:17:50,554 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1942891129, now seen corresponding path program 1 times [2022-07-22 11:17:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148534577] [2022-07-22 11:17:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:50,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:17:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148534577] [2022-07-22 11:17:50,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148534577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:50,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:50,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:17:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940503060] [2022-07-22 11:17:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:17:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:17:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:17:50,783 INFO L87 Difference]: Start difference. First operand 1656 states and 2479 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:52,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:54,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:56,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:58,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:17:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:17:59,384 INFO L93 Difference]: Finished difference Result 4127 states and 6133 transitions. [2022-07-22 11:17:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:17:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-07-22 11:17:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:17:59,387 INFO L225 Difference]: With dead ends: 4127 [2022-07-22 11:17:59,387 INFO L226 Difference]: Without dead ends: 2494 [2022-07-22 11:17:59,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:17:59,389 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 206 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:17:59,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1258 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1031 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2022-07-22 11:17:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2022-07-22 11:17:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2282. [2022-07-22 11:17:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4932047347654538) internal successors, (3406), 2281 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3406 transitions. [2022-07-22 11:17:59,448 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3406 transitions. Word has length 234 [2022-07-22 11:17:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:17:59,448 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3406 transitions. [2022-07-22 11:17:59,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:17:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3406 transitions. [2022-07-22 11:17:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-22 11:17:59,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:17:59,453 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:17:59,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-22 11:17:59,453 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:17:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:17:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -682883463, now seen corresponding path program 1 times [2022-07-22 11:17:59,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:17:59,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471347057] [2022-07-22 11:17:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:17:59,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:17:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:17:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 11:17:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:17:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471347057] [2022-07-22 11:17:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471347057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:17:59,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:17:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:17:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563123823] [2022-07-22 11:17:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:17:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:17:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:17:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:17:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:17:59,611 INFO L87 Difference]: Start difference. First operand 2282 states and 3406 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:01,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:01,746 INFO L93 Difference]: Finished difference Result 4636 states and 6905 transitions. [2022-07-22 11:18:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-22 11:18:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:01,750 INFO L225 Difference]: With dead ends: 4636 [2022-07-22 11:18:01,750 INFO L226 Difference]: Without dead ends: 2377 [2022-07-22 11:18:01,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:01,753 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 35 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:01,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 535 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 11:18:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-07-22 11:18:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2282. [2022-07-22 11:18:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4910127137220517) internal successors, (3401), 2281 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3401 transitions. [2022-07-22 11:18:01,816 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3401 transitions. Word has length 235 [2022-07-22 11:18:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:01,816 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3401 transitions. [2022-07-22 11:18:01,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3401 transitions. [2022-07-22 11:18:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-22 11:18:01,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:01,820 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-22 11:18:01,821 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:01,821 INFO L85 PathProgramCache]: Analyzing trace with hash 999970559, now seen corresponding path program 1 times [2022-07-22 11:18:01,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:01,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002283467] [2022-07-22 11:18:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:01,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:18:02,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002283467] [2022-07-22 11:18:02,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002283467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:02,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:02,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439271145] [2022-07-22 11:18:02,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:02,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:02,068 INFO L87 Difference]: Start difference. First operand 2282 states and 3401 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:03,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:03,588 INFO L93 Difference]: Finished difference Result 4924 states and 7288 transitions. [2022-07-22 11:18:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:18:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-22 11:18:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:03,591 INFO L225 Difference]: With dead ends: 4924 [2022-07-22 11:18:03,591 INFO L226 Difference]: Without dead ends: 2665 [2022-07-22 11:18:03,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:03,593 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 247 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:03,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 625 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:18:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-07-22 11:18:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2285. [2022-07-22 11:18:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4868651488616462) internal successors, (3396), 2284 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3396 transitions. [2022-07-22 11:18:03,652 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3396 transitions. Word has length 235 [2022-07-22 11:18:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:03,653 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3396 transitions. [2022-07-22 11:18:03,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3396 transitions. [2022-07-22 11:18:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-22 11:18:03,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:03,656 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:03,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-07-22 11:18:03,657 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1776964066, now seen corresponding path program 1 times [2022-07-22 11:18:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:03,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158431288] [2022-07-22 11:18:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:03,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-22 11:18:03,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:03,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158431288] [2022-07-22 11:18:03,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158431288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:03,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:03,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:18:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754264133] [2022-07-22 11:18:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:03,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:18:03,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:18:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:18:03,854 INFO L87 Difference]: Start difference. First operand 2285 states and 3396 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:05,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:06,139 INFO L93 Difference]: Finished difference Result 4621 states and 6857 transitions. [2022-07-22 11:18:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-22 11:18:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:06,143 INFO L225 Difference]: With dead ends: 4621 [2022-07-22 11:18:06,143 INFO L226 Difference]: Without dead ends: 2359 [2022-07-22 11:18:06,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:06,145 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 36 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:18:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-07-22 11:18:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2285. [2022-07-22 11:18:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-22 11:18:06,189 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-22 11:18:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:06,189 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-22 11:18:06,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-22 11:18:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-22 11:18:06,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:06,192 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:06,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-22 11:18:06,192 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash -973194819, now seen corresponding path program 1 times [2022-07-22 11:18:06,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:06,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044031555] [2022-07-22 11:18:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:18:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044031555] [2022-07-22 11:18:06,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044031555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:06,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:06,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:18:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976451067] [2022-07-22 11:18:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:18:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:06,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:18:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:06,422 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:08,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:10,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:12,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:13,480 INFO L93 Difference]: Finished difference Result 5382 states and 7948 transitions. [2022-07-22 11:18:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:18:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-07-22 11:18:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:13,483 INFO L225 Difference]: With dead ends: 5382 [2022-07-22 11:18:13,483 INFO L226 Difference]: Without dead ends: 3120 [2022-07-22 11:18:13,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:18:13,486 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 346 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:13,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1107 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 850 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-07-22 11:18:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-07-22 11:18:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2285. [2022-07-22 11:18:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.4851138353765323) internal successors, (3392), 2284 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3392 transitions. [2022-07-22 11:18:13,548 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3392 transitions. Word has length 235 [2022-07-22 11:18:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:13,549 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3392 transitions. [2022-07-22 11:18:13,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3392 transitions. [2022-07-22 11:18:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-22 11:18:13,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:13,552 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-22 11:18:13,552 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1701567074, now seen corresponding path program 1 times [2022-07-22 11:18:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:13,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958139377] [2022-07-22 11:18:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-22 11:18:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:13,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958139377] [2022-07-22 11:18:13,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958139377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:13,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:13,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:18:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854276549] [2022-07-22 11:18:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:13,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:18:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:18:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:18:13,689 INFO L87 Difference]: Start difference. First operand 2285 states and 3392 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:15,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:16,035 INFO L93 Difference]: Finished difference Result 4741 states and 7016 transitions. [2022-07-22 11:18:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-07-22 11:18:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:16,038 INFO L225 Difference]: With dead ends: 4741 [2022-07-22 11:18:16,038 INFO L226 Difference]: Without dead ends: 2479 [2022-07-22 11:18:16,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:16,040 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:16,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 306 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:18:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-07-22 11:18:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2283. [2022-07-22 11:18:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 1.4645048203330413) internal successors, (3342), 2282 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3342 transitions. [2022-07-22 11:18:16,086 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3342 transitions. Word has length 237 [2022-07-22 11:18:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:16,086 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 3342 transitions. [2022-07-22 11:18:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3342 transitions. [2022-07-22 11:18:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-22 11:18:16,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:16,089 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-22 11:18:16,089 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -342440725, now seen corresponding path program 1 times [2022-07-22 11:18:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458042978] [2022-07-22 11:18:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 306 proven. 108 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-22 11:18:16,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458042978] [2022-07-22 11:18:16,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458042978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:18:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815200486] [2022-07-22 11:18:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:18:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:18:16,343 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) [2022-07-22 11:18:16,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:18:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:18:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:18:17,833 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 8 [2022-07-22 11:18:17,866 INFO L356 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2022-07-22 11:18:17,867 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 128 treesize of output 111 [2022-07-22 11:18:17,871 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 126 treesize of output 96 [2022-07-22 11:18:17,873 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 96 treesize of output 66 [2022-07-22 11:18:17,917 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 [2022-07-22 11:18:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 331 proven. 12 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-22 11:18:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:18:17,969 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 107 treesize of output 89 [2022-07-22 11:18:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-22 11:18:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815200486] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:18:17,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:18:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 7] total 14 [2022-07-22 11:18:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543435489] [2022-07-22 11:18:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:17,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:18:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:18:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:18:17,976 INFO L87 Difference]: Start difference. First operand 2283 states and 3342 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:19,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:20,338 INFO L93 Difference]: Finished difference Result 4756 states and 6938 transitions. [2022-07-22 11:18:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-07-22 11:18:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:20,342 INFO L225 Difference]: With dead ends: 4756 [2022-07-22 11:18:20,342 INFO L226 Difference]: Without dead ends: 2496 [2022-07-22 11:18:20,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:18:20,344 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:20,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 353 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:18:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-07-22 11:18:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2173. [2022-07-22 11:18:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4599447513812154) internal successors, (3171), 2172 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3171 transitions. [2022-07-22 11:18:20,404 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3171 transitions. Word has length 250 [2022-07-22 11:18:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:20,404 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3171 transitions. [2022-07-22 11:18:20,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3171 transitions. [2022-07-22 11:18:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-22 11:18:20,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:20,407 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:20,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:18:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:18:20,608 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash 425026962, now seen corresponding path program 1 times [2022-07-22 11:18:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966812873] [2022-07-22 11:18:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-22 11:18:20,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966812873] [2022-07-22 11:18:20,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966812873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:20,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:20,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:18:20,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272519963] [2022-07-22 11:18:20,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:18:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:18:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:18:20,757 INFO L87 Difference]: Start difference. First operand 2173 states and 3171 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:22,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:23,004 INFO L93 Difference]: Finished difference Result 4359 states and 6360 transitions. [2022-07-22 11:18:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-07-22 11:18:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:23,007 INFO L225 Difference]: With dead ends: 4359 [2022-07-22 11:18:23,007 INFO L226 Difference]: Without dead ends: 2209 [2022-07-22 11:18:23,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:23,008 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 19 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:23,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 526 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 11:18:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-07-22 11:18:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2173. [2022-07-22 11:18:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 1.4585635359116023) internal successors, (3168), 2172 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 3168 transitions. [2022-07-22 11:18:23,069 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 3168 transitions. Word has length 250 [2022-07-22 11:18:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:23,070 INFO L495 AbstractCegarLoop]: Abstraction has 2173 states and 3168 transitions. [2022-07-22 11:18:23,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 3168 transitions. [2022-07-22 11:18:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-22 11:18:23,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:23,072 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-22 11:18:23,073 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1396127449, now seen corresponding path program 1 times [2022-07-22 11:18:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:23,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628983428] [2022-07-22 11:18:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-22 11:18:23,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628983428] [2022-07-22 11:18:23,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628983428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:23,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:23,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192663718] [2022-07-22 11:18:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:23,262 INFO L87 Difference]: Start difference. First operand 2173 states and 3168 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:25,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:27,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:27,685 INFO L93 Difference]: Finished difference Result 3939 states and 5731 transitions. [2022-07-22 11:18:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:18:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-22 11:18:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:27,688 INFO L225 Difference]: With dead ends: 3939 [2022-07-22 11:18:27,688 INFO L226 Difference]: Without dead ends: 1789 [2022-07-22 11:18:27,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:18:27,689 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 138 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:27,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 397 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 325 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 11:18:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-07-22 11:18:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1524. [2022-07-22 11:18:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 1.4530531845042678) internal successors, (2213), 1523 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2213 transitions. [2022-07-22 11:18:27,729 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2213 transitions. Word has length 251 [2022-07-22 11:18:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:27,729 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 2213 transitions. [2022-07-22 11:18:27,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2213 transitions. [2022-07-22 11:18:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-22 11:18:27,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:27,731 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:27,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-22 11:18:27,731 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1556018017, now seen corresponding path program 1 times [2022-07-22 11:18:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:27,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435244515] [2022-07-22 11:18:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:27,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-22 11:18:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:27,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435244515] [2022-07-22 11:18:27,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435244515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:27,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:27,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:27,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274382794] [2022-07-22 11:18:27,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:27,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:27,944 INFO L87 Difference]: Start difference. First operand 1524 states and 2213 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:29,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:31,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:32,608 INFO L93 Difference]: Finished difference Result 3592 states and 5170 transitions. [2022-07-22 11:18:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:18:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-22 11:18:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:32,610 INFO L225 Difference]: With dead ends: 3592 [2022-07-22 11:18:32,610 INFO L226 Difference]: Without dead ends: 2091 [2022-07-22 11:18:32,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:18:32,612 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 343 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:32,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 766 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 478 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 11:18:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-07-22 11:18:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1581. [2022-07-22 11:18:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.4462025316455696) internal successors, (2285), 1580 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2285 transitions. [2022-07-22 11:18:32,663 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2285 transitions. Word has length 251 [2022-07-22 11:18:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2285 transitions. [2022-07-22 11:18:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2285 transitions. [2022-07-22 11:18:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-22 11:18:32,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:32,665 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-22 11:18:32,665 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1791911393, now seen corresponding path program 1 times [2022-07-22 11:18:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:32,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492327227] [2022-07-22 11:18:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:18:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492327227] [2022-07-22 11:18:32,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492327227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:32,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:18:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664042548] [2022-07-22 11:18:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:18:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:18:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:32,930 INFO L87 Difference]: Start difference. First operand 1581 states and 2285 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:34,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:36,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:38,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:39,808 INFO L93 Difference]: Finished difference Result 3940 states and 5660 transitions. [2022-07-22 11:18:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:18:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2022-07-22 11:18:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:39,810 INFO L225 Difference]: With dead ends: 3940 [2022-07-22 11:18:39,810 INFO L226 Difference]: Without dead ends: 2382 [2022-07-22 11:18:39,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:18:39,812 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 325 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:39,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1073 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.8s Time] [2022-07-22 11:18:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-07-22 11:18:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2186. [2022-07-22 11:18:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.440274599542334) internal successors, (3147), 2185 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3147 transitions. [2022-07-22 11:18:39,881 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3147 transitions. Word has length 251 [2022-07-22 11:18:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:39,881 INFO L495 AbstractCegarLoop]: Abstraction has 2186 states and 3147 transitions. [2022-07-22 11:18:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3147 transitions. [2022-07-22 11:18:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-22 11:18:39,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:39,883 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-22 11:18:39,883 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 204295532, now seen corresponding path program 1 times [2022-07-22 11:18:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597056009] [2022-07-22 11:18:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-22 11:18:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597056009] [2022-07-22 11:18:40,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597056009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:40,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:40,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:40,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715829721] [2022-07-22 11:18:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:40,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:40,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:40,081 INFO L87 Difference]: Start difference. First operand 2186 states and 3147 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:42,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:42,505 INFO L93 Difference]: Finished difference Result 4733 states and 6784 transitions. [2022-07-22 11:18:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:18:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-22 11:18:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:42,508 INFO L225 Difference]: With dead ends: 4733 [2022-07-22 11:18:42,508 INFO L226 Difference]: Without dead ends: 2570 [2022-07-22 11:18:42,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:42,509 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 244 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:42,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 616 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 11:18:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2022-07-22 11:18:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2189. [2022-07-22 11:18:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-22 11:18:42,561 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-22 11:18:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:42,561 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-22 11:18:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-22 11:18:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-22 11:18:42,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:42,564 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-22 11:18:42,564 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -502301074, now seen corresponding path program 1 times [2022-07-22 11:18:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556634228] [2022-07-22 11:18:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:18:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556634228] [2022-07-22 11:18:42,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556634228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:42,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:42,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:18:42,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129010704] [2022-07-22 11:18:42,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:42,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:18:42,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:18:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:42,854 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:44,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:46,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:48,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:49,729 INFO L93 Difference]: Finished difference Result 5166 states and 7383 transitions. [2022-07-22 11:18:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:18:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-07-22 11:18:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:49,733 INFO L225 Difference]: With dead ends: 5166 [2022-07-22 11:18:49,733 INFO L226 Difference]: Without dead ends: 3000 [2022-07-22 11:18:49,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:18:49,735 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 324 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:49,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-07-22 11:18:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-07-22 11:18:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2189. [2022-07-22 11:18:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 1.4360146252285193) internal successors, (3142), 2188 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 3142 transitions. [2022-07-22 11:18:49,809 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 3142 transitions. Word has length 252 [2022-07-22 11:18:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:49,809 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 3142 transitions. [2022-07-22 11:18:49,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 3142 transitions. [2022-07-22 11:18:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-22 11:18:49,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:49,811 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:49,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-22 11:18:49,812 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1345889978, now seen corresponding path program 1 times [2022-07-22 11:18:49,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:49,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039604161] [2022-07-22 11:18:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-22 11:18:50,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039604161] [2022-07-22 11:18:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039604161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:50,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:50,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:18:50,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886065338] [2022-07-22 11:18:50,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:50,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:18:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:18:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:18:50,012 INFO L87 Difference]: Start difference. First operand 2189 states and 3142 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:52,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:54,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:18:54,671 INFO L93 Difference]: Finished difference Result 4894 states and 6988 transitions. [2022-07-22 11:18:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:18:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-22 11:18:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:18:54,674 INFO L225 Difference]: With dead ends: 4894 [2022-07-22 11:18:54,674 INFO L226 Difference]: Without dead ends: 2728 [2022-07-22 11:18:54,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:18:54,676 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 327 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:18:54,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 762 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 11:18:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-07-22 11:18:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2192. [2022-07-22 11:18:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-22 11:18:54,736 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-22 11:18:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:18:54,736 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-22 11:18:54,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-22 11:18:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-22 11:18:54,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:18:54,738 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:18:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-07-22 11:18:54,739 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:18:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:18:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1775548284, now seen corresponding path program 1 times [2022-07-22 11:18:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:18:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693089434] [2022-07-22 11:18:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:18:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:18:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:18:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 11:18:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:18:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693089434] [2022-07-22 11:18:54,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693089434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:18:54,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:18:54,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:18:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819711772] [2022-07-22 11:18:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:18:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:18:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:18:54,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:18:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:18:54,950 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:18:56,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:18:58,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:01,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:01,863 INFO L93 Difference]: Finished difference Result 5162 states and 7360 transitions. [2022-07-22 11:19:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:19:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-22 11:19:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:01,865 INFO L225 Difference]: With dead ends: 5162 [2022-07-22 11:19:01,865 INFO L226 Difference]: Without dead ends: 2993 [2022-07-22 11:19:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:19:01,867 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 323 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:01,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1076 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 833 Invalid, 3 Unknown, 0 Unchecked, 6.8s Time] [2022-07-22 11:19:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-07-22 11:19:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2192. [2022-07-22 11:19:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4317663167503423) internal successors, (3137), 2191 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3137 transitions. [2022-07-22 11:19:01,922 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3137 transitions. Word has length 253 [2022-07-22 11:19:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3137 transitions. [2022-07-22 11:19:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3137 transitions. [2022-07-22 11:19:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-22 11:19:01,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:01,925 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:01,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-07-22 11:19:01,925 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1482178204, now seen corresponding path program 1 times [2022-07-22 11:19:01,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:01,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693336079] [2022-07-22 11:19:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-07-22 11:19:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:02,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693336079] [2022-07-22 11:19:02,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693336079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:19:02,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:19:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:19:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64889909] [2022-07-22 11:19:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:19:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:19:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:19:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:19:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:19:02,185 INFO L87 Difference]: Start difference. First operand 2192 states and 3137 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:05,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:19:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:19:05,282 INFO L93 Difference]: Finished difference Result 4381 states and 6270 transitions. [2022-07-22 11:19:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:19:05,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-07-22 11:19:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:19:05,284 INFO L225 Difference]: With dead ends: 4381 [2022-07-22 11:19:05,284 INFO L226 Difference]: Without dead ends: 2192 [2022-07-22 11:19:05,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:19:05,285 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:19:05,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 631 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-07-22 11:19:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-07-22 11:19:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2192. [2022-07-22 11:19:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.4313099041533546) internal successors, (3136), 2191 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3136 transitions. [2022-07-22 11:19:05,358 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3136 transitions. Word has length 263 [2022-07-22 11:19:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:19:05,358 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3136 transitions. [2022-07-22 11:19:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:19:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3136 transitions. [2022-07-22 11:19:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-22 11:19:05,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:19:05,360 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:19:05,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-07-22 11:19:05,360 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:19:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:19:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash 350204006, now seen corresponding path program 1 times [2022-07-22 11:19:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:19:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350984286] [2022-07-22 11:19:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:05,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:19:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 313 proven. 242 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 11:19:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:19:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350984286] [2022-07-22 11:19:06,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350984286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:19:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316363850] [2022-07-22 11:19:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:19:06,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:19:06,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:19:06,968 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) [2022-07-22 11:19:06,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:19:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:19:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 191 conjunts are in the unsatisfiable core [2022-07-22 11:19:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:19:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 11:19:08,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 24 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12633 treesize of output 2535