./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.16.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 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:06:52,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:06:52,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:06:52,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:06:52,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:06:52,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:06:52,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:06:52,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:06:52,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:06:52,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:06:52,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:06:52,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:06:52,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:06:52,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:06:52,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:06:52,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:06:52,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:06:52,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:06:52,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:06:52,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:06:52,598 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:06:52,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:06:52,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:06:52,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:06:52,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:06:52,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:06:52,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:06:52,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:06:52,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:06:52,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:06:52,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:06:52,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:06:52,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:06:52,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:06:52,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:06:52,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:06:52,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:06:52,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:06:52,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:06:52,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:06:52,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:06:52,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:06:52,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:06:52,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:06:52,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:06:52,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:06:52,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:06:52,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:06:52,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:06:52,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:06:52,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:06:52,643 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:06:52,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:06:52,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:06:52,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:06:52,645 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:06:52,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:06:52,646 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:06:52,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:06:52,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:06:52,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:06:52,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:06:52,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:06:52,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:06:52,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:06:52,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:06:52,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:06:52,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:06:52,648 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:06:52,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:06:52,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:06:52,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2022-07-19 11:06:52,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:06:52,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:06:52,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:06:52,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:06:52,863 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:06:52,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2022-07-19 11:06:52,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01252d726/41d00f2eebbb48cb90fa9f601dd047a5/FLAG32dda389f [2022-07-19 11:06:53,329 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:06:53,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2022-07-19 11:06:53,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01252d726/41d00f2eebbb48cb90fa9f601dd047a5/FLAG32dda389f [2022-07-19 11:06:53,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01252d726/41d00f2eebbb48cb90fa9f601dd047a5 [2022-07-19 11:06:53,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:06:53,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:06:53,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:06:53,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:06:53,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:06:53,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:06:53" (1/1) ... [2022-07-19 11:06:53,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c458a92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:53, skipping insertion in model container [2022-07-19 11:06:53,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:06:53" (1/1) ... [2022-07-19 11:06:53,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:06:53,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:06:54,023 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.16.i.cil-2.c[77660,77673] [2022-07-19 11:06:54,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:06:54,041 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:06:54,102 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.16.i.cil-2.c[77660,77673] [2022-07-19 11:06:54,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:06:54,116 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:06:54,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54 WrapperNode [2022-07-19 11:06:54,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:06:54,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:06:54,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:06:54,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:06:54,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,203 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 810 [2022-07-19 11:06:54,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:06:54,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:06:54,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:06:54,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:06:54,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:06:54,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:06:54,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:06:54,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:06:54,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (1/1) ... [2022-07-19 11:06:54,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:06:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:06:54,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 11:06:54,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 11:06:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 11:06:54,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:06:54,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:06:54,624 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:06:54,626 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:06:54,636 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 11:06:56,805 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-19 11:06:56,806 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-19 11:06:56,806 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:06:56,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:06:56,813 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:06:56,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:06:56 BoogieIcfgContainer [2022-07-19 11:06:56,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:06:56,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:06:56,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:06:56,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:06:56,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:06:53" (1/3) ... [2022-07-19 11:06:56,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f598ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:06:56, skipping insertion in model container [2022-07-19 11:06:56,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:06:54" (2/3) ... [2022-07-19 11:06:56,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f598ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:06:56, skipping insertion in model container [2022-07-19 11:06:56,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:06:56" (3/3) ... [2022-07-19 11:06:56,823 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-2.c [2022-07-19 11:06:56,838 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:06:56,838 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:06:56,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:06:56,873 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@7adbbeb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70624224 [2022-07-19 11:06:56,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:06:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 11:06:56,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:06:56,893 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] [2022-07-19 11:06:56,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:06:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:06:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453347, now seen corresponding path program 1 times [2022-07-19 11:06:56,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:06:56,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327958679] [2022-07-19 11:06:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:06:56,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:06:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:06:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:06:57,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:06:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327958679] [2022-07-19 11:06:57,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327958679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:06:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:06:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:06:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814359422] [2022-07-19 11:06:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:06:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:06:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:06:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:06:57,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:06:57,362 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 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 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:06:57,986 INFO L93 Difference]: Finished difference Result 447 states and 768 transitions. [2022-07-19 11:06:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:06:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-07-19 11:06:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:06:57,995 INFO L225 Difference]: With dead ends: 447 [2022-07-19 11:06:57,995 INFO L226 Difference]: Without dead ends: 273 [2022-07-19 11:06:57,998 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 [2022-07-19 11:06:58,000 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 172 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:06:58,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 495 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:06:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-19 11:06:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 186. [2022-07-19 11:06:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.627027027027027) internal successors, (301), 185 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 301 transitions. [2022-07-19 11:06:58,033 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 301 transitions. Word has length 46 [2022-07-19 11:06:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:06:58,033 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 301 transitions. [2022-07-19 11:06:58,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 301 transitions. [2022-07-19 11:06:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 11:06:58,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:06:58,035 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] [2022-07-19 11:06:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:06:58,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:06:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:06:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash 413309822, now seen corresponding path program 1 times [2022-07-19 11:06:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:06:58,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839242415] [2022-07-19 11:06:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:06:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:06:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:06:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:06:58,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:06:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839242415] [2022-07-19 11:06:58,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839242415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:06:58,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:06:58,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:06:58,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149417021] [2022-07-19 11:06:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:06:58,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:06:58,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:06:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:06:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:06:58,160 INFO L87 Difference]: Start difference. First operand 186 states and 301 transitions. 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) [2022-07-19 11:06:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:06:59,017 INFO L93 Difference]: Finished difference Result 390 states and 629 transitions. [2022-07-19 11:06:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:06:59,018 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 [2022-07-19 11:06:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:06:59,019 INFO L225 Difference]: With dead ends: 390 [2022-07-19 11:06:59,020 INFO L226 Difference]: Without dead ends: 214 [2022-07-19 11:06:59,021 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 [2022-07-19 11:06:59,022 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 22 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:06:59,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 523 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:06:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-19 11:06:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2022-07-19 11:06:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.6326530612244898) internal successors, (320), 196 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 320 transitions. [2022-07-19 11:06:59,031 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 320 transitions. Word has length 47 [2022-07-19 11:06:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:06:59,032 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 320 transitions. [2022-07-19 11:06:59,032 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) [2022-07-19 11:06:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 320 transitions. [2022-07-19 11:06:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 11:06:59,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:06:59,034 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] [2022-07-19 11:06:59,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:06:59,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:06:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:06:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1553389893, now seen corresponding path program 1 times [2022-07-19 11:06:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:06:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988861834] [2022-07-19 11:06:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:06:59,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:06:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:06:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:06:59,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:06:59,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988861834] [2022-07-19 11:06:59,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988861834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:06:59,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:06:59,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:06:59,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172420398] [2022-07-19 11:06:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:06:59,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:06:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:06:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:06:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:06:59,135 INFO L87 Difference]: Start difference. First operand 197 states and 320 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:06:59,617 INFO L93 Difference]: Finished difference Result 538 states and 879 transitions. [2022-07-19 11:06:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:06:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-07-19 11:06:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:06:59,619 INFO L225 Difference]: With dead ends: 538 [2022-07-19 11:06:59,619 INFO L226 Difference]: Without dead ends: 362 [2022-07-19 11:06:59,620 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 [2022-07-19 11:06:59,620 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 161 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:06:59,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 704 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:06:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-19 11:06:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 229. [2022-07-19 11:06:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 228 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 371 transitions. [2022-07-19 11:06:59,644 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 371 transitions. Word has length 60 [2022-07-19 11:06:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:06:59,645 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 371 transitions. [2022-07-19 11:06:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:06:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 371 transitions. [2022-07-19 11:06:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 11:06:59,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:06:59,646 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] [2022-07-19 11:06:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:06:59,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:06:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:06:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864692, now seen corresponding path program 1 times [2022-07-19 11:06:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:06:59,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218004655] [2022-07-19 11:06:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:06:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:06:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:06:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:06:59,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:06:59,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218004655] [2022-07-19 11:06:59,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218004655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:06:59,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:06:59,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:06:59,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743590937] [2022-07-19 11:06:59,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:06:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:06:59,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:06:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:06:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:06:59,728 INFO L87 Difference]: Start difference. First operand 229 states and 371 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) [2022-07-19 11:07:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:00,625 INFO L93 Difference]: Finished difference Result 546 states and 882 transitions. [2022-07-19 11:07:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:00,626 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 [2022-07-19 11:07:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:00,627 INFO L225 Difference]: With dead ends: 546 [2022-07-19 11:07:00,627 INFO L226 Difference]: Without dead ends: 338 [2022-07-19 11:07:00,628 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 [2022-07-19 11:07:00,628 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 166 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:00,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:07:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-19 11:07:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2022-07-19 11:07:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 228 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 367 transitions. [2022-07-19 11:07:00,642 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 367 transitions. Word has length 61 [2022-07-19 11:07:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:00,644 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 367 transitions. [2022-07-19 11:07:00,644 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) [2022-07-19 11:07:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 367 transitions. [2022-07-19 11:07:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 11:07:00,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:00,647 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] [2022-07-19 11:07:00,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:07:00,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1129853920, now seen corresponding path program 1 times [2022-07-19 11:07:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684534702] [2022-07-19 11:07:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684534702] [2022-07-19 11:07:00,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684534702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:00,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:00,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403016742] [2022-07-19 11:07:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:00,763 INFO L87 Difference]: Start difference. First operand 229 states and 367 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) [2022-07-19 11:07:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:01,555 INFO L93 Difference]: Finished difference Result 453 states and 723 transitions. [2022-07-19 11:07:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:01,556 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 [2022-07-19 11:07:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:01,557 INFO L225 Difference]: With dead ends: 453 [2022-07-19 11:07:01,557 INFO L226 Difference]: Without dead ends: 245 [2022-07-19 11:07:01,557 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 [2022-07-19 11:07:01,558 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:01,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 527 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:07:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-19 11:07:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2022-07-19 11:07:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.605263157894737) internal successors, (366), 228 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 366 transitions. [2022-07-19 11:07:01,564 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 366 transitions. Word has length 61 [2022-07-19 11:07:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:01,564 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 366 transitions. [2022-07-19 11:07:01,564 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) [2022-07-19 11:07:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 366 transitions. [2022-07-19 11:07:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 11:07:01,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:01,565 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] [2022-07-19 11:07:01,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:07:01,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash 324676919, now seen corresponding path program 1 times [2022-07-19 11:07:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:01,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513795492] [2022-07-19 11:07:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:01,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513795492] [2022-07-19 11:07:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513795492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:01,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323411441] [2022-07-19 11:07:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:01,657 INFO L87 Difference]: Start difference. First operand 229 states and 366 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) [2022-07-19 11:07:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:02,242 INFO L93 Difference]: Finished difference Result 452 states and 721 transitions. [2022-07-19 11:07:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:02,243 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 [2022-07-19 11:07:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:02,244 INFO L225 Difference]: With dead ends: 452 [2022-07-19 11:07:02,244 INFO L226 Difference]: Without dead ends: 244 [2022-07-19 11:07:02,244 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 [2022-07-19 11:07:02,245 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 19 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:02,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 529 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-19 11:07:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-07-19 11:07:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6008771929824561) internal successors, (365), 228 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 365 transitions. [2022-07-19 11:07:02,250 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 365 transitions. Word has length 61 [2022-07-19 11:07:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:02,251 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 365 transitions. [2022-07-19 11:07:02,251 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) [2022-07-19 11:07:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 365 transitions. [2022-07-19 11:07:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 11:07:02,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:02,252 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] [2022-07-19 11:07:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:07:02,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -624671241, now seen corresponding path program 1 times [2022-07-19 11:07:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:02,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360566201] [2022-07-19 11:07:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:02,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:02,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360566201] [2022-07-19 11:07:02,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360566201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:02,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:02,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118992526] [2022-07-19 11:07:02,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:02,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:02,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:02,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:02,326 INFO L87 Difference]: Start difference. First operand 229 states and 365 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) [2022-07-19 11:07:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:02,858 INFO L93 Difference]: Finished difference Result 546 states and 873 transitions. [2022-07-19 11:07:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:02,859 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 [2022-07-19 11:07:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:02,860 INFO L225 Difference]: With dead ends: 546 [2022-07-19 11:07:02,860 INFO L226 Difference]: Without dead ends: 338 [2022-07-19 11:07:02,861 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 [2022-07-19 11:07:02,861 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 159 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:02,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:07:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-19 11:07:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 230. [2022-07-19 11:07:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5895196506550218) internal successors, (364), 229 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 364 transitions. [2022-07-19 11:07:02,868 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 364 transitions. Word has length 61 [2022-07-19 11:07:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:02,868 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 364 transitions. [2022-07-19 11:07:02,868 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) [2022-07-19 11:07:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 364 transitions. [2022-07-19 11:07:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 11:07:02,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:02,869 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] [2022-07-19 11:07:02,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 11:07:02,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1608456996, now seen corresponding path program 1 times [2022-07-19 11:07:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:02,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344286429] [2022-07-19 11:07:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344286429] [2022-07-19 11:07:02,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344286429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:02,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:02,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000371120] [2022-07-19 11:07:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:02,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:02,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:02,951 INFO L87 Difference]: Start difference. First operand 230 states and 364 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) [2022-07-19 11:07:04,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:07:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:04,216 INFO L93 Difference]: Finished difference Result 452 states and 717 transitions. [2022-07-19 11:07:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:04,217 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 [2022-07-19 11:07:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:04,218 INFO L225 Difference]: With dead ends: 452 [2022-07-19 11:07:04,218 INFO L226 Difference]: Without dead ends: 243 [2022-07-19 11:07:04,219 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 [2022-07-19 11:07:04,219 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 22 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:04,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 11:07:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-19 11:07:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2022-07-19 11:07:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5851528384279476) internal successors, (363), 229 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 363 transitions. [2022-07-19 11:07:04,242 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 363 transitions. Word has length 62 [2022-07-19 11:07:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:04,242 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 363 transitions. [2022-07-19 11:07:04,242 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) [2022-07-19 11:07:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 363 transitions. [2022-07-19 11:07:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 11:07:04,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:04,243 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] [2022-07-19 11:07:04,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:07:04,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash 557952677, now seen corresponding path program 1 times [2022-07-19 11:07:04,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:04,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409418761] [2022-07-19 11:07:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:04,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:04,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409418761] [2022-07-19 11:07:04,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409418761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:04,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:04,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179819237] [2022-07-19 11:07:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:04,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:04,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:04,333 INFO L87 Difference]: Start difference. First operand 230 states and 363 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) [2022-07-19 11:07:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:05,037 INFO L93 Difference]: Finished difference Result 452 states and 716 transitions. [2022-07-19 11:07:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:05,038 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 [2022-07-19 11:07:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:05,039 INFO L225 Difference]: With dead ends: 452 [2022-07-19 11:07:05,039 INFO L226 Difference]: Without dead ends: 243 [2022-07-19 11:07:05,039 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 [2022-07-19 11:07:05,040 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 20 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:05,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:07:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-19 11:07:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2022-07-19 11:07:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5807860262008733) internal successors, (362), 229 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2022-07-19 11:07:05,044 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 63 [2022-07-19 11:07:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:05,044 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2022-07-19 11:07:05,044 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) [2022-07-19 11:07:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2022-07-19 11:07:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 11:07:05,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:05,045 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] [2022-07-19 11:07:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 11:07:05,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1981706935, now seen corresponding path program 1 times [2022-07-19 11:07:05,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:05,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38201903] [2022-07-19 11:07:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38201903] [2022-07-19 11:07:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38201903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069464809] [2022-07-19 11:07:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:05,138 INFO L87 Difference]: Start difference. First operand 230 states and 362 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) [2022-07-19 11:07:06,235 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 [] [2022-07-19 11:07:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:06,413 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2022-07-19 11:07:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:06,413 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 [2022-07-19 11:07:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:06,414 INFO L225 Difference]: With dead ends: 442 [2022-07-19 11:07:06,414 INFO L226 Difference]: Without dead ends: 233 [2022-07-19 11:07:06,414 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 [2022-07-19 11:07:06,415 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 11 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:06,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 547 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 11:07:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-19 11:07:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2022-07-19 11:07:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5764192139737991) internal successors, (361), 229 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 361 transitions. [2022-07-19 11:07:06,419 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 361 transitions. Word has length 64 [2022-07-19 11:07:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:06,419 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 361 transitions. [2022-07-19 11:07:06,419 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) [2022-07-19 11:07:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 361 transitions. [2022-07-19 11:07:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 11:07:06,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:06,420 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] [2022-07-19 11:07:06,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 11:07:06,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1581555535, now seen corresponding path program 1 times [2022-07-19 11:07:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:06,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743568823] [2022-07-19 11:07:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:06,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:06,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743568823] [2022-07-19 11:07:06,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743568823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:06,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:06,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:06,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464810838] [2022-07-19 11:07:06,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:06,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:06,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:06,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:06,501 INFO L87 Difference]: Start difference. First operand 230 states and 361 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) [2022-07-19 11:07:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:07,325 INFO L93 Difference]: Finished difference Result 479 states and 757 transitions. [2022-07-19 11:07:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:07,326 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 [2022-07-19 11:07:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:07,327 INFO L225 Difference]: With dead ends: 479 [2022-07-19 11:07:07,327 INFO L226 Difference]: Without dead ends: 270 [2022-07-19 11:07:07,327 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 [2022-07-19 11:07:07,328 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 31 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:07,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 551 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:07:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-19 11:07:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 252. [2022-07-19 11:07:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5776892430278884) internal successors, (396), 251 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 396 transitions. [2022-07-19 11:07:07,335 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 396 transitions. Word has length 64 [2022-07-19 11:07:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:07,336 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 396 transitions. [2022-07-19 11:07:07,337 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) [2022-07-19 11:07:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 396 transitions. [2022-07-19 11:07:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 11:07:07,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:07,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:07:07,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash 993655827, now seen corresponding path program 1 times [2022-07-19 11:07:07,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:07,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007487265] [2022-07-19 11:07:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007487265] [2022-07-19 11:07:07,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007487265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:07,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:07,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591653180] [2022-07-19 11:07:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:07,432 INFO L87 Difference]: Start difference. First operand 252 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:08,090 INFO L93 Difference]: Finished difference Result 591 states and 937 transitions. [2022-07-19 11:07:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-07-19 11:07:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:08,092 INFO L225 Difference]: With dead ends: 591 [2022-07-19 11:07:08,092 INFO L226 Difference]: Without dead ends: 360 [2022-07-19 11:07:08,093 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 [2022-07-19 11:07:08,093 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 164 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:08,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-19 11:07:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-19 11:07:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5617529880478087) internal successors, (392), 251 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 392 transitions. [2022-07-19 11:07:08,098 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 392 transitions. Word has length 78 [2022-07-19 11:07:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:08,098 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 392 transitions. [2022-07-19 11:07:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 392 transitions. [2022-07-19 11:07:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 11:07:08,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:08,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 11:07:08,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 11:07:08,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1846780630, now seen corresponding path program 1 times [2022-07-19 11:07:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426329174] [2022-07-19 11:07:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426329174] [2022-07-19 11:07:08,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426329174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:08,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:08,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026469036] [2022-07-19 11:07:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:08,179 INFO L87 Difference]: Start difference. First operand 252 states and 392 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:08,617 INFO L93 Difference]: Finished difference Result 500 states and 782 transitions. [2022-07-19 11:07:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-07-19 11:07:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:08,619 INFO L225 Difference]: With dead ends: 500 [2022-07-19 11:07:08,619 INFO L226 Difference]: Without dead ends: 269 [2022-07-19 11:07:08,619 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 [2022-07-19 11:07:08,620 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 33 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:08,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 553 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:07:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-19 11:07:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 252. [2022-07-19 11:07:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5577689243027888) internal successors, (391), 251 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 391 transitions. [2022-07-19 11:07:08,626 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 391 transitions. Word has length 78 [2022-07-19 11:07:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:08,627 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 391 transitions. [2022-07-19 11:07:08,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 391 transitions. [2022-07-19 11:07:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 11:07:08,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:08,628 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:08,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 11:07:08,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1282217583, now seen corresponding path program 1 times [2022-07-19 11:07:08,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:08,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970820047] [2022-07-19 11:07:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:08,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970820047] [2022-07-19 11:07:08,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970820047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:08,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:08,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:08,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602423730] [2022-07-19 11:07:08,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:08,751 INFO L87 Difference]: Start difference. First operand 252 states and 391 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:10,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:07:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:10,341 INFO L93 Difference]: Finished difference Result 591 states and 927 transitions. [2022-07-19 11:07:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-07-19 11:07:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:10,342 INFO L225 Difference]: With dead ends: 591 [2022-07-19 11:07:10,342 INFO L226 Difference]: Without dead ends: 360 [2022-07-19 11:07:10,343 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 [2022-07-19 11:07:10,343 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 162 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:10,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 11:07:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-19 11:07:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-19 11:07:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5418326693227091) internal successors, (387), 251 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 387 transitions. [2022-07-19 11:07:10,348 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 387 transitions. Word has length 79 [2022-07-19 11:07:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:10,348 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 387 transitions. [2022-07-19 11:07:10,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 387 transitions. [2022-07-19 11:07:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 11:07:10,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:10,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:10,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 11:07:10,349 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1141353944, now seen corresponding path program 1 times [2022-07-19 11:07:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371082083] [2022-07-19 11:07:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371082083] [2022-07-19 11:07:10,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371082083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:10,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:10,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564334529] [2022-07-19 11:07:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:10,425 INFO L87 Difference]: Start difference. First operand 252 states and 387 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) [2022-07-19 11:07:11,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:07:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:11,833 INFO L93 Difference]: Finished difference Result 591 states and 919 transitions. [2022-07-19 11:07:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:11,834 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 80 [2022-07-19 11:07:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:11,835 INFO L225 Difference]: With dead ends: 591 [2022-07-19 11:07:11,835 INFO L226 Difference]: Without dead ends: 360 [2022-07-19 11:07:11,836 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 [2022-07-19 11:07:11,836 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 160 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:11,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 11:07:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-19 11:07:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-19 11:07:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5258964143426295) internal successors, (383), 251 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 383 transitions. [2022-07-19 11:07:11,841 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 383 transitions. Word has length 80 [2022-07-19 11:07:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:11,841 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 383 transitions. [2022-07-19 11:07:11,841 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) [2022-07-19 11:07:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 383 transitions. [2022-07-19 11:07:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 11:07:11,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:11,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:11,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 11:07:11,842 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:11,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1076136842, now seen corresponding path program 1 times [2022-07-19 11:07:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:11,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733693615] [2022-07-19 11:07:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:11,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:07:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:11,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733693615] [2022-07-19 11:07:11,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733693615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:11,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:11,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625983102] [2022-07-19 11:07:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:11,926 INFO L87 Difference]: Start difference. First operand 252 states and 383 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) [2022-07-19 11:07:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:12,500 INFO L93 Difference]: Finished difference Result 581 states and 898 transitions. [2022-07-19 11:07:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:12,500 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 81 [2022-07-19 11:07:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:12,501 INFO L225 Difference]: With dead ends: 581 [2022-07-19 11:07:12,501 INFO L226 Difference]: Without dead ends: 350 [2022-07-19 11:07:12,502 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 [2022-07-19 11:07:12,502 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 151 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:12,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 408 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-19 11:07:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 252. [2022-07-19 11:07:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5099601593625498) internal successors, (379), 251 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 379 transitions. [2022-07-19 11:07:12,533 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 379 transitions. Word has length 81 [2022-07-19 11:07:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:12,533 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 379 transitions. [2022-07-19 11:07:12,533 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) [2022-07-19 11:07:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 379 transitions. [2022-07-19 11:07:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 11:07:12,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:12,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 11:07:12,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 11:07:12,534 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:12,534 INFO L85 PathProgramCache]: Analyzing trace with hash -226348903, now seen corresponding path program 1 times [2022-07-19 11:07:12,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:12,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529974408] [2022-07-19 11:07:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:12,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529974408] [2022-07-19 11:07:12,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529974408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:12,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:12,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163138307] [2022-07-19 11:07:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:12,613 INFO L87 Difference]: Start difference. First operand 252 states and 379 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2022-07-19 11:07:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:13,356 INFO L93 Difference]: Finished difference Result 581 states and 890 transitions. [2022-07-19 11:07:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 86 [2022-07-19 11:07:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:13,358 INFO L225 Difference]: With dead ends: 581 [2022-07-19 11:07:13,358 INFO L226 Difference]: Without dead ends: 350 [2022-07-19 11:07:13,358 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 [2022-07-19 11:07:13,359 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 125 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:13,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 434 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:07:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-19 11:07:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 275. [2022-07-19 11:07:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.5474452554744527) internal successors, (424), 274 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 424 transitions. [2022-07-19 11:07:13,364 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 424 transitions. Word has length 86 [2022-07-19 11:07:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:13,364 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 424 transitions. [2022-07-19 11:07:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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) [2022-07-19 11:07:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 424 transitions. [2022-07-19 11:07:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-19 11:07:13,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:13,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:13,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 11:07:13,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash 437102048, now seen corresponding path program 1 times [2022-07-19 11:07:13,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:13,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875204582] [2022-07-19 11:07:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:13,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:13,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875204582] [2022-07-19 11:07:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875204582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:13,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:13,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:13,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651422362] [2022-07-19 11:07:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:13,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:13,451 INFO L87 Difference]: Start difference. First operand 275 states and 424 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:14,014 INFO L93 Difference]: Finished difference Result 618 states and 960 transitions. [2022-07-19 11:07:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 114 [2022-07-19 11:07:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:14,016 INFO L225 Difference]: With dead ends: 618 [2022-07-19 11:07:14,016 INFO L226 Difference]: Without dead ends: 364 [2022-07-19 11:07:14,017 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 [2022-07-19 11:07:14,017 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 88 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:14,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 529 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:07:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-19 11:07:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 309. [2022-07-19 11:07:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5487012987012987) internal successors, (477), 308 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 477 transitions. [2022-07-19 11:07:14,022 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 477 transitions. Word has length 114 [2022-07-19 11:07:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:14,022 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 477 transitions. [2022-07-19 11:07:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 477 transitions. [2022-07-19 11:07:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-19 11:07:14,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:14,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 11:07:14,024 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -530248606, now seen corresponding path program 1 times [2022-07-19 11:07:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070779346] [2022-07-19 11:07:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:14,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:14,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070779346] [2022-07-19 11:07:14,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070779346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:14,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818854963] [2022-07-19 11:07:14,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:14,188 INFO L87 Difference]: Start difference. First operand 309 states and 477 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:15,086 INFO L93 Difference]: Finished difference Result 748 states and 1168 transitions. [2022-07-19 11:07:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 114 [2022-07-19 11:07:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:15,088 INFO L225 Difference]: With dead ends: 748 [2022-07-19 11:07:15,088 INFO L226 Difference]: Without dead ends: 460 [2022-07-19 11:07:15,089 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 [2022-07-19 11:07:15,089 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 131 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:15,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 418 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:07:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-19 11:07:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 339. [2022-07-19 11:07:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5562130177514792) internal successors, (526), 338 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 526 transitions. [2022-07-19 11:07:15,096 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 526 transitions. Word has length 114 [2022-07-19 11:07:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:15,096 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 526 transitions. [2022-07-19 11:07:15,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 526 transitions. [2022-07-19 11:07:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 11:07:15,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:15,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:07:15,098 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash 766254903, now seen corresponding path program 1 times [2022-07-19 11:07:15,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:15,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611666506] [2022-07-19 11:07:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:15,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611666506] [2022-07-19 11:07:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611666506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:15,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:15,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:15,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89409066] [2022-07-19 11:07:15,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:15,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:15,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:15,183 INFO L87 Difference]: Start difference. First operand 339 states and 526 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:15,834 INFO L93 Difference]: Finished difference Result 772 states and 1203 transitions. [2022-07-19 11:07:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2022-07-19 11:07:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:15,836 INFO L225 Difference]: With dead ends: 772 [2022-07-19 11:07:15,836 INFO L226 Difference]: Without dead ends: 454 [2022-07-19 11:07:15,837 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 [2022-07-19 11:07:15,837 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:15,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 406 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-19 11:07:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 376. [2022-07-19 11:07:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.56) internal successors, (585), 375 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2022-07-19 11:07:15,845 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 120 [2022-07-19 11:07:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:15,846 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2022-07-19 11:07:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2022-07-19 11:07:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 11:07:15,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:15,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:15,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 11:07:15,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 183105856, now seen corresponding path program 1 times [2022-07-19 11:07:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:15,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935937358] [2022-07-19 11:07:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:15,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935937358] [2022-07-19 11:07:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935937358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:15,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:15,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957769629] [2022-07-19 11:07:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:15,957 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:16,830 INFO L93 Difference]: Finished difference Result 817 states and 1276 transitions. [2022-07-19 11:07:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 [2022-07-19 11:07:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:16,832 INFO L225 Difference]: With dead ends: 817 [2022-07-19 11:07:16,832 INFO L226 Difference]: Without dead ends: 462 [2022-07-19 11:07:16,833 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 [2022-07-19 11:07:16,833 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:16,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 531 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:07:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-19 11:07:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 416. [2022-07-19 11:07:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5614457831325301) internal successors, (648), 415 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 648 transitions. [2022-07-19 11:07:16,840 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 648 transitions. Word has length 121 [2022-07-19 11:07:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 648 transitions. [2022-07-19 11:07:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 648 transitions. [2022-07-19 11:07:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 11:07:16,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:16,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 11:07:16,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1022139518, now seen corresponding path program 1 times [2022-07-19 11:07:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874549372] [2022-07-19 11:07:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 11:07:16,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:16,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874549372] [2022-07-19 11:07:16,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874549372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:16,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:16,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:16,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022999363] [2022-07-19 11:07:16,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:16,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:16,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:16,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:16,928 INFO L87 Difference]: Start difference. First operand 416 states and 648 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:17,532 INFO L93 Difference]: Finished difference Result 848 states and 1325 transitions. [2022-07-19 11:07:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 [2022-07-19 11:07:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:17,534 INFO L225 Difference]: With dead ends: 848 [2022-07-19 11:07:17,534 INFO L226 Difference]: Without dead ends: 453 [2022-07-19 11:07:17,535 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 [2022-07-19 11:07:17,535 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 28 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:17,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 631 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-19 11:07:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 440. [2022-07-19 11:07:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5558086560364466) internal successors, (683), 439 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 683 transitions. [2022-07-19 11:07:17,542 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 683 transitions. Word has length 121 [2022-07-19 11:07:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:17,542 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 683 transitions. [2022-07-19 11:07:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 683 transitions. [2022-07-19 11:07:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-19 11:07:17,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:17,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:17,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 11:07:17,544 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -808576153, now seen corresponding path program 1 times [2022-07-19 11:07:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:17,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443618776] [2022-07-19 11:07:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:17,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 11:07:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:17,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443618776] [2022-07-19 11:07:17,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443618776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:17,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:17,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370158206] [2022-07-19 11:07:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:17,624 INFO L87 Difference]: Start difference. First operand 440 states and 683 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:18,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:07:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:19,181 INFO L93 Difference]: Finished difference Result 897 states and 1395 transitions. [2022-07-19 11:07:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:19,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2022-07-19 11:07:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:19,182 INFO L225 Difference]: With dead ends: 897 [2022-07-19 11:07:19,183 INFO L226 Difference]: Without dead ends: 478 [2022-07-19 11:07:19,183 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 [2022-07-19 11:07:19,183 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 61 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:19,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 537 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 11:07:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-07-19 11:07:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 443. [2022-07-19 11:07:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5520361990950227) internal successors, (686), 442 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 686 transitions. [2022-07-19 11:07:19,192 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 686 transitions. Word has length 128 [2022-07-19 11:07:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 686 transitions. [2022-07-19 11:07:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 686 transitions. [2022-07-19 11:07:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 11:07:19,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:19,194 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2022-07-19 11:07:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 11:07:19,195 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1942673447, now seen corresponding path program 1 times [2022-07-19 11:07:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:19,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476935153] [2022-07-19 11:07:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 11:07:19,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:19,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476935153] [2022-07-19 11:07:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476935153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:19,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:19,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:19,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561612012] [2022-07-19 11:07:19,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:19,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:19,300 INFO L87 Difference]: Start difference. First operand 443 states and 686 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) [2022-07-19 11:07:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:19,691 INFO L93 Difference]: Finished difference Result 899 states and 1396 transitions. [2022-07-19 11:07:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:19,692 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 135 [2022-07-19 11:07:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:19,693 INFO L225 Difference]: With dead ends: 899 [2022-07-19 11:07:19,693 INFO L226 Difference]: Without dead ends: 477 [2022-07-19 11:07:19,694 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 [2022-07-19 11:07:19,694 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 83 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:19,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 539 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:07:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-07-19 11:07:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 443. [2022-07-19 11:07:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5497737556561086) internal successors, (685), 442 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 685 transitions. [2022-07-19 11:07:19,703 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 685 transitions. Word has length 135 [2022-07-19 11:07:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:19,703 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 685 transitions. [2022-07-19 11:07:19,703 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) [2022-07-19 11:07:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 685 transitions. [2022-07-19 11:07:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-19 11:07:19,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:19,704 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2022-07-19 11:07:19,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 11:07:19,705 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1914173157, now seen corresponding path program 1 times [2022-07-19 11:07:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825883405] [2022-07-19 11:07:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 11:07:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825883405] [2022-07-19 11:07:19,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825883405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:19,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:19,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775602188] [2022-07-19 11:07:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:19,778 INFO L87 Difference]: Start difference. First operand 443 states and 685 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) [2022-07-19 11:07:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:20,341 INFO L93 Difference]: Finished difference Result 877 states and 1362 transitions. [2022-07-19 11:07:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:20,342 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 135 [2022-07-19 11:07:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:20,343 INFO L225 Difference]: With dead ends: 877 [2022-07-19 11:07:20,343 INFO L226 Difference]: Without dead ends: 455 [2022-07-19 11:07:20,344 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 [2022-07-19 11:07:20,344 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 33 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:20,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 631 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:07:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-19 11:07:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 443. [2022-07-19 11:07:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5475113122171946) internal successors, (684), 442 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 684 transitions. [2022-07-19 11:07:20,350 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 684 transitions. Word has length 135 [2022-07-19 11:07:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:20,350 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 684 transitions. [2022-07-19 11:07:20,350 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) [2022-07-19 11:07:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 684 transitions. [2022-07-19 11:07:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-19 11:07:20,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:20,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 11:07:20,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 11:07:20,353 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1862166372, now seen corresponding path program 1 times [2022-07-19 11:07:20,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959046095] [2022-07-19 11:07:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 11:07:20,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:20,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959046095] [2022-07-19 11:07:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959046095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:20,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:20,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:20,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716766435] [2022-07-19 11:07:20,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:20,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:20,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:20,444 INFO L87 Difference]: Start difference. First operand 443 states and 684 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) [2022-07-19 11:07:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:21,107 INFO L93 Difference]: Finished difference Result 980 states and 1518 transitions. [2022-07-19 11:07:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:21,107 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 141 [2022-07-19 11:07:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:21,109 INFO L225 Difference]: With dead ends: 980 [2022-07-19 11:07:21,109 INFO L226 Difference]: Without dead ends: 558 [2022-07-19 11:07:21,110 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 [2022-07-19 11:07:21,110 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 134 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:21,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 434 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-19 11:07:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 473. [2022-07-19 11:07:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5381355932203389) internal successors, (726), 472 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 726 transitions. [2022-07-19 11:07:21,117 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 726 transitions. Word has length 141 [2022-07-19 11:07:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:21,118 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 726 transitions. [2022-07-19 11:07:21,118 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) [2022-07-19 11:07:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 726 transitions. [2022-07-19 11:07:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-19 11:07:21,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:21,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 11:07:21,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 11:07:21,120 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1844194602, now seen corresponding path program 1 times [2022-07-19 11:07:21,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:21,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078986098] [2022-07-19 11:07:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 11:07:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078986098] [2022-07-19 11:07:21,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078986098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:21,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:21,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514634015] [2022-07-19 11:07:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:21,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:21,234 INFO L87 Difference]: Start difference. First operand 473 states and 726 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:21,686 INFO L93 Difference]: Finished difference Result 1000 states and 1538 transitions. [2022-07-19 11:07:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 142 [2022-07-19 11:07:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:21,688 INFO L225 Difference]: With dead ends: 1000 [2022-07-19 11:07:21,688 INFO L226 Difference]: Without dead ends: 548 [2022-07-19 11:07:21,689 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 [2022-07-19 11:07:21,689 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:21,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 406 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:07:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-19 11:07:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 473. [2022-07-19 11:07:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5254237288135593) internal successors, (720), 472 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 720 transitions. [2022-07-19 11:07:21,696 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 720 transitions. Word has length 142 [2022-07-19 11:07:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:21,697 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 720 transitions. [2022-07-19 11:07:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 720 transitions. [2022-07-19 11:07:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 11:07:21,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:21,698 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:21,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 11:07:21,698 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:21,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2025405034, now seen corresponding path program 1 times [2022-07-19 11:07:21,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:21,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397214903] [2022-07-19 11:07:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 11:07:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397214903] [2022-07-19 11:07:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397214903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:21,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:21,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499147634] [2022-07-19 11:07:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:21,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:21,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:21,780 INFO L87 Difference]: Start difference. First operand 473 states and 720 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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) [2022-07-19 11:07:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:22,611 INFO L93 Difference]: Finished difference Result 957 states and 1462 transitions. [2022-07-19 11:07:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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 143 [2022-07-19 11:07:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:22,613 INFO L225 Difference]: With dead ends: 957 [2022-07-19 11:07:22,613 INFO L226 Difference]: Without dead ends: 505 [2022-07-19 11:07:22,614 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 [2022-07-19 11:07:22,614 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 73 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:22,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 557 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:07:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-19 11:07:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-07-19 11:07:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5233050847457628) internal successors, (719), 472 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 719 transitions. [2022-07-19 11:07:22,623 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 719 transitions. Word has length 143 [2022-07-19 11:07:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:22,623 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 719 transitions. [2022-07-19 11:07:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 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) [2022-07-19 11:07:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 719 transitions. [2022-07-19 11:07:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 11:07:22,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:22,625 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 11:07:22,625 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash -372065496, now seen corresponding path program 1 times [2022-07-19 11:07:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:22,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772018268] [2022-07-19 11:07:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 11:07:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772018268] [2022-07-19 11:07:22,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772018268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:22,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:22,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:22,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704070615] [2022-07-19 11:07:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:22,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:22,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:22,703 INFO L87 Difference]: Start difference. First operand 473 states and 719 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:22,756 INFO L93 Difference]: Finished difference Result 1374 states and 2105 transitions. [2022-07-19 11:07:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 143 [2022-07-19 11:07:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:22,759 INFO L225 Difference]: With dead ends: 1374 [2022-07-19 11:07:22,759 INFO L226 Difference]: Without dead ends: 922 [2022-07-19 11:07:22,760 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 [2022-07-19 11:07:22,763 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 151 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:22,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 443 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-07-19 11:07:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2022-07-19 11:07:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.511400651465798) internal successors, (1392), 921 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1392 transitions. [2022-07-19 11:07:22,805 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1392 transitions. Word has length 143 [2022-07-19 11:07:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:22,805 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1392 transitions. [2022-07-19 11:07:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1392 transitions. [2022-07-19 11:07:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 11:07:22,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:22,807 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:22,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 11:07:22,807 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2056193126, now seen corresponding path program 1 times [2022-07-19 11:07:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880942161] [2022-07-19 11:07:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 11:07:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880942161] [2022-07-19 11:07:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880942161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:22,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:22,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011235117] [2022-07-19 11:07:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:22,880 INFO L87 Difference]: Start difference. First operand 922 states and 1392 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) [2022-07-19 11:07:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:22,915 INFO L93 Difference]: Finished difference Result 1850 states and 2796 transitions. [2022-07-19 11:07:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:22,915 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 143 [2022-07-19 11:07:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:22,918 INFO L225 Difference]: With dead ends: 1850 [2022-07-19 11:07:22,918 INFO L226 Difference]: Without dead ends: 949 [2022-07-19 11:07:22,919 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 [2022-07-19 11:07:22,919 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:22,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 428 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-07-19 11:07:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 949. [2022-07-19 11:07:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 1.5052742616033756) internal successors, (1427), 948 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1427 transitions. [2022-07-19 11:07:22,933 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1427 transitions. Word has length 143 [2022-07-19 11:07:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:22,933 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1427 transitions. [2022-07-19 11:07:22,942 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) [2022-07-19 11:07:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1427 transitions. [2022-07-19 11:07:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 11:07:22,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:22,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 11:07:22,944 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash 5784228, now seen corresponding path program 1 times [2022-07-19 11:07:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095844637] [2022-07-19 11:07:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-19 11:07:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095844637] [2022-07-19 11:07:23,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095844637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:23,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:23,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990423342] [2022-07-19 11:07:23,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:23,019 INFO L87 Difference]: Start difference. First operand 949 states and 1427 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) [2022-07-19 11:07:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:23,050 INFO L93 Difference]: Finished difference Result 1879 states and 2832 transitions. [2022-07-19 11:07:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:23,050 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 143 [2022-07-19 11:07:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:23,053 INFO L225 Difference]: With dead ends: 1879 [2022-07-19 11:07:23,053 INFO L226 Difference]: Without dead ends: 951 [2022-07-19 11:07:23,054 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 [2022-07-19 11:07:23,054 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:23,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 407 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-07-19 11:07:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2022-07-19 11:07:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.5042105263157894) internal successors, (1429), 950 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1429 transitions. [2022-07-19 11:07:23,075 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1429 transitions. Word has length 143 [2022-07-19 11:07:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:23,075 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1429 transitions. [2022-07-19 11:07:23,075 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) [2022-07-19 11:07:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1429 transitions. [2022-07-19 11:07:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-19 11:07:23,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:23,079 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:23,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 11:07:23,079 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2075454910, now seen corresponding path program 1 times [2022-07-19 11:07:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655226934] [2022-07-19 11:07:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 11:07:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655226934] [2022-07-19 11:07:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655226934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:23,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:23,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211052831] [2022-07-19 11:07:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:23,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:23,156 INFO L87 Difference]: Start difference. First operand 951 states and 1429 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:23,214 INFO L93 Difference]: Finished difference Result 2328 states and 3523 transitions. [2022-07-19 11:07:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 145 [2022-07-19 11:07:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:23,218 INFO L225 Difference]: With dead ends: 2328 [2022-07-19 11:07:23,218 INFO L226 Difference]: Without dead ends: 1400 [2022-07-19 11:07:23,220 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 [2022-07-19 11:07:23,221 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:23,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 588 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-07-19 11:07:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2022-07-19 11:07:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.5025017869907076) internal successors, (2102), 1399 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2102 transitions. [2022-07-19 11:07:23,276 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2102 transitions. Word has length 145 [2022-07-19 11:07:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:23,276 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 2102 transitions. [2022-07-19 11:07:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2102 transitions. [2022-07-19 11:07:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-19 11:07:23,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:23,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 11:07:23,279 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1084473730, now seen corresponding path program 1 times [2022-07-19 11:07:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366224389] [2022-07-19 11:07:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-19 11:07:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366224389] [2022-07-19 11:07:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366224389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:23,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470290175] [2022-07-19 11:07:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:23,365 INFO L87 Difference]: Start difference. First operand 1400 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:24,034 INFO L93 Difference]: Finished difference Result 2930 states and 4405 transitions. [2022-07-19 11:07:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 174 [2022-07-19 11:07:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:24,039 INFO L225 Difference]: With dead ends: 2930 [2022-07-19 11:07:24,039 INFO L226 Difference]: Without dead ends: 1553 [2022-07-19 11:07:24,041 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 [2022-07-19 11:07:24,041 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 42 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:24,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 647 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-07-19 11:07:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1484. [2022-07-19 11:07:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.5043830074173972) internal successors, (2231), 1483 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2231 transitions. [2022-07-19 11:07:24,063 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2231 transitions. Word has length 174 [2022-07-19 11:07:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:24,063 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2231 transitions. [2022-07-19 11:07:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2231 transitions. [2022-07-19 11:07:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-19 11:07:24,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:24,066 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 11:07:24,067 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1196950761, now seen corresponding path program 1 times [2022-07-19 11:07:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147578424] [2022-07-19 11:07:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 11:07:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147578424] [2022-07-19 11:07:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147578424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:24,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011573048] [2022-07-19 11:07:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:24,182 INFO L87 Difference]: Start difference. First operand 1484 states and 2231 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:24,823 INFO L93 Difference]: Finished difference Result 3162 states and 4730 transitions. [2022-07-19 11:07:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 188 [2022-07-19 11:07:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:24,828 INFO L225 Difference]: With dead ends: 3162 [2022-07-19 11:07:24,828 INFO L226 Difference]: Without dead ends: 1701 [2022-07-19 11:07:24,830 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 [2022-07-19 11:07:24,830 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 145 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:24,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 408 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:07:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-07-19 11:07:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1484. [2022-07-19 11:07:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.4902225219150371) internal successors, (2210), 1483 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2210 transitions. [2022-07-19 11:07:24,866 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2210 transitions. Word has length 188 [2022-07-19 11:07:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:24,867 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2210 transitions. [2022-07-19 11:07:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2210 transitions. [2022-07-19 11:07:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-19 11:07:24,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:24,869 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:24,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 11:07:24,870 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1909029588, now seen corresponding path program 1 times [2022-07-19 11:07:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:24,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856555301] [2022-07-19 11:07:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-19 11:07:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856555301] [2022-07-19 11:07:24,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856555301] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:24,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215905078] [2022-07-19 11:07:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:24,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:24,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:24,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:24,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 11:07:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:25,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:07:25,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-19 11:07:25,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:07:25,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215905078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:25,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:07:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 11:07:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612475339] [2022-07-19 11:07:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:25,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:07:25,737 INFO L87 Difference]: Start difference. First operand 1484 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 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) [2022-07-19 11:07:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:25,819 INFO L93 Difference]: Finished difference Result 3423 states and 5122 transitions. [2022-07-19 11:07:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 196 [2022-07-19 11:07:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:25,825 INFO L225 Difference]: With dead ends: 3423 [2022-07-19 11:07:25,825 INFO L226 Difference]: Without dead ends: 1962 [2022-07-19 11:07:25,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:07:25,827 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:25,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 11:07:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-07-19 11:07:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2022-07-19 11:07:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.4915859255481898) internal successors, (2925), 1961 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2925 transitions. [2022-07-19 11:07:25,893 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2925 transitions. Word has length 196 [2022-07-19 11:07:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:25,894 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2925 transitions. [2022-07-19 11:07:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 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) [2022-07-19 11:07:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2925 transitions. [2022-07-19 11:07:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-19 11:07:25,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:25,897 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:25,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 11:07:26,115 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,SelfDestructingSolverStorable34 [2022-07-19 11:07:26,116 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -489247903, now seen corresponding path program 1 times [2022-07-19 11:07:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:26,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018794244] [2022-07-19 11:07:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-19 11:07:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018794244] [2022-07-19 11:07:26,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018794244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:26,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:26,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914833474] [2022-07-19 11:07:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:26,230 INFO L87 Difference]: Start difference. First operand 1962 states and 2925 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:26,304 INFO L93 Difference]: Finished difference Result 4379 states and 6552 transitions. [2022-07-19 11:07:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 198 [2022-07-19 11:07:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:26,311 INFO L225 Difference]: With dead ends: 4379 [2022-07-19 11:07:26,311 INFO L226 Difference]: Without dead ends: 2440 [2022-07-19 11:07:26,313 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 [2022-07-19 11:07:26,314 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:26,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-19 11:07:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2440. [2022-07-19 11:07:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.4928249282492825) internal successors, (3641), 2439 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3641 transitions. [2022-07-19 11:07:26,354 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3641 transitions. Word has length 198 [2022-07-19 11:07:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:26,354 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3641 transitions. [2022-07-19 11:07:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3641 transitions. [2022-07-19 11:07:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-19 11:07:26,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:26,358 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:26,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 11:07:26,358 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1545883921, now seen corresponding path program 1 times [2022-07-19 11:07:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918882827] [2022-07-19 11:07:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-19 11:07:26,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:26,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918882827] [2022-07-19 11:07:26,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918882827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:26,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:26,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142067722] [2022-07-19 11:07:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:26,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:26,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:26,525 INFO L87 Difference]: Start difference. First operand 2440 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:26,615 INFO L93 Difference]: Finished difference Result 5335 states and 7984 transitions. [2022-07-19 11:07:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 [2022-07-19 11:07:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:26,635 INFO L225 Difference]: With dead ends: 5335 [2022-07-19 11:07:26,636 INFO L226 Difference]: Without dead ends: 2918 [2022-07-19 11:07:26,638 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 [2022-07-19 11:07:26,639 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 167 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:26,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 382 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-07-19 11:07:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2918. [2022-07-19 11:07:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 1.4940006856359274) internal successors, (4358), 2917 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4358 transitions. [2022-07-19 11:07:26,698 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4358 transitions. Word has length 237 [2022-07-19 11:07:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:26,699 INFO L495 AbstractCegarLoop]: Abstraction has 2918 states and 4358 transitions. [2022-07-19 11:07:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4358 transitions. [2022-07-19 11:07:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-19 11:07:26,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:26,703 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 11:07:26,704 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1779514151, now seen corresponding path program 1 times [2022-07-19 11:07:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:26,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338627229] [2022-07-19 11:07:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-19 11:07:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338627229] [2022-07-19 11:07:26,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338627229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:26,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:26,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889405758] [2022-07-19 11:07:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:26,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:26,817 INFO L87 Difference]: Start difference. First operand 2918 states and 4358 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 11:07:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:26,903 INFO L93 Difference]: Finished difference Result 6291 states and 9418 transitions. [2022-07-19 11:07:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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 239 [2022-07-19 11:07:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:26,909 INFO L225 Difference]: With dead ends: 6291 [2022-07-19 11:07:26,909 INFO L226 Difference]: Without dead ends: 3396 [2022-07-19 11:07:26,912 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 [2022-07-19 11:07:26,913 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 168 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:26,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3396 states. [2022-07-19 11:07:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3396 to 3396. [2022-07-19 11:07:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 1.495139911634757) internal successors, (5076), 3395 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5076 transitions. [2022-07-19 11:07:27,002 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5076 transitions. Word has length 239 [2022-07-19 11:07:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:27,002 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 5076 transitions. [2022-07-19 11:07:27,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 11:07:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5076 transitions. [2022-07-19 11:07:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-19 11:07:27,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:27,006 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-19 11:07:27,007 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash 29939523, now seen corresponding path program 1 times [2022-07-19 11:07:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46398784] [2022-07-19 11:07:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:27,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-07-19 11:07:27,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:27,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46398784] [2022-07-19 11:07:27,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46398784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:27,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:27,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:27,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381374507] [2022-07-19 11:07:27,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:27,135 INFO L87 Difference]: Start difference. First operand 3396 states and 5076 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:27,219 INFO L93 Difference]: Finished difference Result 7240 states and 10843 transitions. [2022-07-19 11:07:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 271 [2022-07-19 11:07:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:27,225 INFO L225 Difference]: With dead ends: 7240 [2022-07-19 11:07:27,226 INFO L226 Difference]: Without dead ends: 3867 [2022-07-19 11:07:27,228 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 [2022-07-19 11:07:27,230 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:27,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 587 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-07-19 11:07:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3867. [2022-07-19 11:07:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 1.494568028970512) internal successors, (5778), 3866 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 5778 transitions. [2022-07-19 11:07:27,287 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 5778 transitions. Word has length 271 [2022-07-19 11:07:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:27,288 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 5778 transitions. [2022-07-19 11:07:27,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 5778 transitions. [2022-07-19 11:07:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-19 11:07:27,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:27,293 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 11:07:27,294 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 278086017, now seen corresponding path program 1 times [2022-07-19 11:07:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:27,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462352556] [2022-07-19 11:07:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-19 11:07:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:27,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462352556] [2022-07-19 11:07:27,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462352556] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:27,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:27,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42733074] [2022-07-19 11:07:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:27,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:27,435 INFO L87 Difference]: Start difference. First operand 3867 states and 5778 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:27,527 INFO L93 Difference]: Finished difference Result 8156 states and 12209 transitions. [2022-07-19 11:07:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:27,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 271 [2022-07-19 11:07:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:27,534 INFO L225 Difference]: With dead ends: 8156 [2022-07-19 11:07:27,534 INFO L226 Difference]: Without dead ends: 4312 [2022-07-19 11:07:27,538 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 [2022-07-19 11:07:27,538 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 158 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:27,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 590 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-07-19 11:07:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4312. [2022-07-19 11:07:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 4311 states have (on average 1.4936209696126188) internal successors, (6439), 4311 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6439 transitions. [2022-07-19 11:07:27,603 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6439 transitions. Word has length 271 [2022-07-19 11:07:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:27,604 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6439 transitions. [2022-07-19 11:07:27,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6439 transitions. [2022-07-19 11:07:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-19 11:07:27,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:27,611 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 11:07:27,611 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1434461779, now seen corresponding path program 1 times [2022-07-19 11:07:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034911861] [2022-07-19 11:07:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-19 11:07:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034911861] [2022-07-19 11:07:27,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034911861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:27,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:27,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503913410] [2022-07-19 11:07:27,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:27,758 INFO L87 Difference]: Start difference. First operand 4312 states and 6439 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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) [2022-07-19 11:07:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:27,886 INFO L93 Difference]: Finished difference Result 9079 states and 13580 transitions. [2022-07-19 11:07:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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 346 [2022-07-19 11:07:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:27,893 INFO L225 Difference]: With dead ends: 9079 [2022-07-19 11:07:27,894 INFO L226 Difference]: Without dead ends: 4790 [2022-07-19 11:07:27,898 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 [2022-07-19 11:07:27,899 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:27,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 378 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 11:07:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2022-07-19 11:07:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4790. [2022-07-19 11:07:27,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 4789 states have (on average 1.4950929212779285) internal successors, (7160), 4789 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 7160 transitions. [2022-07-19 11:07:27,970 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 7160 transitions. Word has length 346 [2022-07-19 11:07:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:27,971 INFO L495 AbstractCegarLoop]: Abstraction has 4790 states and 7160 transitions. [2022-07-19 11:07:27,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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) [2022-07-19 11:07:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 7160 transitions. [2022-07-19 11:07:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-07-19 11:07:27,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:27,978 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:27,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 11:07:27,978 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1169005770, now seen corresponding path program 1 times [2022-07-19 11:07:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486534440] [2022-07-19 11:07:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:27,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-07-19 11:07:28,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486534440] [2022-07-19 11:07:28,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486534440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:28,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:28,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220447280] [2022-07-19 11:07:28,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:28,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:28,170 INFO L87 Difference]: Start difference. First operand 4790 states and 7160 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 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) [2022-07-19 11:07:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:28,295 INFO L93 Difference]: Finished difference Result 10035 states and 15022 transitions. [2022-07-19 11:07:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 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 387 [2022-07-19 11:07:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:28,303 INFO L225 Difference]: With dead ends: 10035 [2022-07-19 11:07:28,303 INFO L226 Difference]: Without dead ends: 5268 [2022-07-19 11:07:28,307 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 [2022-07-19 11:07:28,309 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:28,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 377 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 11:07:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2022-07-19 11:07:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2022-07-19 11:07:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.496487564078223) internal successors, (7882), 5267 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 7882 transitions. [2022-07-19 11:07:28,404 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 7882 transitions. Word has length 387 [2022-07-19 11:07:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:28,404 INFO L495 AbstractCegarLoop]: Abstraction has 5268 states and 7882 transitions. [2022-07-19 11:07:28,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 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) [2022-07-19 11:07:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 7882 transitions. [2022-07-19 11:07:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-19 11:07:28,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:28,412 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:28,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 11:07:28,413 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash -477358949, now seen corresponding path program 1 times [2022-07-19 11:07:28,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:28,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645028314] [2022-07-19 11:07:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2022-07-19 11:07:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:28,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645028314] [2022-07-19 11:07:28,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645028314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:28,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:28,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509825435] [2022-07-19 11:07:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:28,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:28,571 INFO L87 Difference]: Start difference. First operand 5268 states and 7882 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 11:07:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:28,678 INFO L93 Difference]: Finished difference Result 10985 states and 16457 transitions. [2022-07-19 11:07:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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 394 [2022-07-19 11:07:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:28,687 INFO L225 Difference]: With dead ends: 10985 [2022-07-19 11:07:28,688 INFO L226 Difference]: Without dead ends: 5740 [2022-07-19 11:07:28,693 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 [2022-07-19 11:07:28,693 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:28,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2022-07-19 11:07:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5740. [2022-07-19 11:07:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5739 states have (on average 1.4959052099668932) internal successors, (8585), 5739 states have internal predecessors, (8585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 8585 transitions. [2022-07-19 11:07:28,812 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 8585 transitions. Word has length 394 [2022-07-19 11:07:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:28,814 INFO L495 AbstractCegarLoop]: Abstraction has 5740 states and 8585 transitions. [2022-07-19 11:07:28,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 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) [2022-07-19 11:07:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 8585 transitions. [2022-07-19 11:07:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-19 11:07:28,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:28,822 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:28,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-19 11:07:28,823 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1914583371, now seen corresponding path program 1 times [2022-07-19 11:07:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655049335] [2022-07-19 11:07:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-07-19 11:07:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:28,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655049335] [2022-07-19 11:07:28,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655049335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:28,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:28,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832771008] [2022-07-19 11:07:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:28,993 INFO L87 Difference]: Start difference. First operand 5740 states and 8585 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:29,097 INFO L93 Difference]: Finished difference Result 11935 states and 17872 transitions. [2022-07-19 11:07:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:29,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 470 [2022-07-19 11:07:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:29,106 INFO L225 Difference]: With dead ends: 11935 [2022-07-19 11:07:29,106 INFO L226 Difference]: Without dead ends: 6218 [2022-07-19 11:07:29,111 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 [2022-07-19 11:07:29,111 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:29,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 375 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2022-07-19 11:07:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 6218. [2022-07-19 11:07:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6217 states have (on average 1.4973459868103587) internal successors, (9309), 6217 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 9309 transitions. [2022-07-19 11:07:29,229 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 9309 transitions. Word has length 470 [2022-07-19 11:07:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:29,229 INFO L495 AbstractCegarLoop]: Abstraction has 6218 states and 9309 transitions. [2022-07-19 11:07:29,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 9309 transitions. [2022-07-19 11:07:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-07-19 11:07:29,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:29,238 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-19 11:07:29,239 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2096433782, now seen corresponding path program 1 times [2022-07-19 11:07:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:29,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991160446] [2022-07-19 11:07:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 744 proven. 7 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2022-07-19 11:07:29,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991160446] [2022-07-19 11:07:29,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991160446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:29,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380796890] [2022-07-19 11:07:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:29,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:29,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:29,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:29,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:07:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:07:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-07-19 11:07:30,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:07:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380796890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:30,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:07:30,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 11:07:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214805805] [2022-07-19 11:07:30,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:30,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:07:30,507 INFO L87 Difference]: Start difference. First operand 6218 states and 9309 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:30,619 INFO L93 Difference]: Finished difference Result 12891 states and 19320 transitions. [2022-07-19 11:07:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 512 [2022-07-19 11:07:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:30,630 INFO L225 Difference]: With dead ends: 12891 [2022-07-19 11:07:30,630 INFO L226 Difference]: Without dead ends: 6696 [2022-07-19 11:07:30,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:07:30,637 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:30,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 374 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6696 states. [2022-07-19 11:07:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6696 to 6696. [2022-07-19 11:07:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6696 states, 6695 states have (on average 1.4987303958177745) internal successors, (10034), 6695 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6696 states to 6696 states and 10034 transitions. [2022-07-19 11:07:30,738 INFO L78 Accepts]: Start accepts. Automaton has 6696 states and 10034 transitions. Word has length 512 [2022-07-19 11:07:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:30,738 INFO L495 AbstractCegarLoop]: Abstraction has 6696 states and 10034 transitions. [2022-07-19 11:07:30,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6696 states and 10034 transitions. [2022-07-19 11:07:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-19 11:07:30,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:30,751 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:30,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 11:07:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-19 11:07:30,964 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2030741037, now seen corresponding path program 1 times [2022-07-19 11:07:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57863950] [2022-07-19 11:07:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2022-07-19 11:07:31,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57863950] [2022-07-19 11:07:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57863950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:31,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:31,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646747604] [2022-07-19 11:07:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:31,255 INFO L87 Difference]: Start difference. First operand 6696 states and 10034 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:31,757 INFO L93 Difference]: Finished difference Result 14544 states and 21738 transitions. [2022-07-19 11:07:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 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 520 [2022-07-19 11:07:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:31,771 INFO L225 Difference]: With dead ends: 14544 [2022-07-19 11:07:31,771 INFO L226 Difference]: Without dead ends: 7871 [2022-07-19 11:07:31,778 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 [2022-07-19 11:07:31,778 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 73 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 703 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:07:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2022-07-19 11:07:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7270. [2022-07-19 11:07:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 1.4997936442426745) internal successors, (10902), 7269 states have internal predecessors, (10902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 10902 transitions. [2022-07-19 11:07:31,888 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 10902 transitions. Word has length 520 [2022-07-19 11:07:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:31,889 INFO L495 AbstractCegarLoop]: Abstraction has 7270 states and 10902 transitions. [2022-07-19 11:07:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 10902 transitions. [2022-07-19 11:07:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-19 11:07:31,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:31,898 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:31,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 11:07:31,898 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1407400015, now seen corresponding path program 1 times [2022-07-19 11:07:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:31,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483946023] [2022-07-19 11:07:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2022-07-19 11:07:32,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483946023] [2022-07-19 11:07:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483946023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:32,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:32,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62155636] [2022-07-19 11:07:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:32,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:32,128 INFO L87 Difference]: Start difference. First operand 7270 states and 10902 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:32,250 INFO L93 Difference]: Finished difference Result 15031 states and 22561 transitions. [2022-07-19 11:07:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 520 [2022-07-19 11:07:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:32,262 INFO L225 Difference]: With dead ends: 15031 [2022-07-19 11:07:32,262 INFO L226 Difference]: Without dead ends: 7784 [2022-07-19 11:07:32,267 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 [2022-07-19 11:07:32,268 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:32,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7784 states. [2022-07-19 11:07:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7784 to 7784. [2022-07-19 11:07:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 1.4991648464602338) internal successors, (11668), 7783 states have internal predecessors, (11668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 11668 transitions. [2022-07-19 11:07:32,367 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 11668 transitions. Word has length 520 [2022-07-19 11:07:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:32,368 INFO L495 AbstractCegarLoop]: Abstraction has 7784 states and 11668 transitions. [2022-07-19 11:07:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 11668 transitions. [2022-07-19 11:07:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-07-19 11:07:32,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:32,378 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 11:07:32,378 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash -876039620, now seen corresponding path program 1 times [2022-07-19 11:07:32,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:32,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259281119] [2022-07-19 11:07:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:32,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 2561 trivial. 0 not checked. [2022-07-19 11:07:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:32,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259281119] [2022-07-19 11:07:32,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259281119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:32,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:32,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414239959] [2022-07-19 11:07:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:32,641 INFO L87 Difference]: Start difference. First operand 7784 states and 11668 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:32,778 INFO L93 Difference]: Finished difference Result 16064 states and 24100 transitions. [2022-07-19 11:07:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 597 [2022-07-19 11:07:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:32,789 INFO L225 Difference]: With dead ends: 16064 [2022-07-19 11:07:32,790 INFO L226 Difference]: Without dead ends: 8303 [2022-07-19 11:07:32,796 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 [2022-07-19 11:07:32,797 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:32,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 11:07:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2022-07-19 11:07:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 8303. [2022-07-19 11:07:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8303 states, 8302 states have (on average 1.5004818116116598) internal successors, (12457), 8302 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8303 states to 8303 states and 12457 transitions. [2022-07-19 11:07:32,922 INFO L78 Accepts]: Start accepts. Automaton has 8303 states and 12457 transitions. Word has length 597 [2022-07-19 11:07:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:32,922 INFO L495 AbstractCegarLoop]: Abstraction has 8303 states and 12457 transitions. [2022-07-19 11:07:32,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8303 states and 12457 transitions. [2022-07-19 11:07:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-19 11:07:32,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:32,933 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:32,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 11:07:32,934 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1729200158, now seen corresponding path program 1 times [2022-07-19 11:07:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265003409] [2022-07-19 11:07:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:32,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2022-07-19 11:07:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265003409] [2022-07-19 11:07:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265003409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:33,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:33,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:07:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916316189] [2022-07-19 11:07:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:07:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:07:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:07:33,271 INFO L87 Difference]: Start difference. First operand 8303 states and 12457 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:33,390 INFO L93 Difference]: Finished difference Result 8824 states and 13249 transitions. [2022-07-19 11:07:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:07:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 640 [2022-07-19 11:07:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:33,401 INFO L225 Difference]: With dead ends: 8824 [2022-07-19 11:07:33,401 INFO L226 Difference]: Without dead ends: 8822 [2022-07-19 11:07:33,404 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 [2022-07-19 11:07:33,404 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 371 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:07:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2022-07-19 11:07:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 8822. [2022-07-19 11:07:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 1.5017571703888448) internal successors, (13247), 8821 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 13247 transitions. [2022-07-19 11:07:33,529 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 13247 transitions. Word has length 640 [2022-07-19 11:07:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:33,530 INFO L495 AbstractCegarLoop]: Abstraction has 8822 states and 13247 transitions. [2022-07-19 11:07:33,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 13247 transitions. [2022-07-19 11:07:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2022-07-19 11:07:33,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:33,542 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-19 11:07:33,542 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1235463390, now seen corresponding path program 1 times [2022-07-19 11:07:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777834574] [2022-07-19 11:07:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2676 proven. 480 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2022-07-19 11:07:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777834574] [2022-07-19 11:07:34,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777834574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665477227] [2022-07-19 11:07:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:34,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:34,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:07:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 11:07:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:35,752 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 [2022-07-19 11:07:35,757 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 13 [2022-07-19 11:07:35,775 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-19 11:07:35,775 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 24 treesize of output 33 [2022-07-19 11:07:35,863 INFO L356 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-07-19 11:07:35,864 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 33 treesize of output 45 [2022-07-19 11:07:35,938 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 [2022-07-19 11:07:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2245 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2022-07-19 11:07:35,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:07:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665477227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:35,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:07:35,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2022-07-19 11:07:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86404228] [2022-07-19 11:07:35,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:35,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:07:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:07:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-19 11:07:35,949 INFO L87 Difference]: Start difference. First operand 8822 states and 13247 transitions. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:37,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:07:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:38,303 INFO L93 Difference]: Finished difference Result 24937 states and 37503 transitions. [2022-07-19 11:07:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 11:07:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 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 649 [2022-07-19 11:07:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:38,322 INFO L225 Difference]: With dead ends: 24937 [2022-07-19 11:07:38,322 INFO L226 Difference]: Without dead ends: 16138 [2022-07-19 11:07:38,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-19 11:07:38,333 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 127 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:38,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1140 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 478 Invalid, 0 Unknown, 82 Unchecked, 2.1s Time] [2022-07-19 11:07:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2022-07-19 11:07:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 15847. [2022-07-19 11:07:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15847 states, 15846 states have (on average 1.5089612520509907) internal successors, (23911), 15846 states have internal predecessors, (23911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15847 states to 15847 states and 23911 transitions. [2022-07-19 11:07:38,650 INFO L78 Accepts]: Start accepts. Automaton has 15847 states and 23911 transitions. Word has length 649 [2022-07-19 11:07:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:38,651 INFO L495 AbstractCegarLoop]: Abstraction has 15847 states and 23911 transitions. [2022-07-19 11:07:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 15847 states and 23911 transitions. [2022-07-19 11:07:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-07-19 11:07:38,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:38,672 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:38,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 11:07:38,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:38,892 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash 71254686, now seen corresponding path program 1 times [2022-07-19 11:07:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337597384] [2022-07-19 11:07:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 2140 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2022-07-19 11:07:39,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:39,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337597384] [2022-07-19 11:07:39,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337597384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:39,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:39,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750938940] [2022-07-19 11:07:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:39,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:39,147 INFO L87 Difference]: Start difference. First operand 15847 states and 23911 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:40,081 INFO L93 Difference]: Finished difference Result 33097 states and 49753 transitions. [2022-07-19 11:07:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 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 651 [2022-07-19 11:07:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:40,103 INFO L225 Difference]: With dead ends: 33097 [2022-07-19 11:07:40,103 INFO L226 Difference]: Without dead ends: 17273 [2022-07-19 11:07:40,116 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 [2022-07-19 11:07:40,117 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 71 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:40,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 701 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:07:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2022-07-19 11:07:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 15881. [2022-07-19 11:07:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15880 states have (on average 1.5078715365239295) internal successors, (23945), 15880 states have internal predecessors, (23945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 23945 transitions. [2022-07-19 11:07:40,447 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 23945 transitions. Word has length 651 [2022-07-19 11:07:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:40,447 INFO L495 AbstractCegarLoop]: Abstraction has 15881 states and 23945 transitions. [2022-07-19 11:07:40,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 23945 transitions. [2022-07-19 11:07:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-07-19 11:07:40,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:40,467 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:40,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-19 11:07:40,468 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash -645334114, now seen corresponding path program 1 times [2022-07-19 11:07:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:40,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624723470] [2022-07-19 11:07:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 2478 proven. 187 refuted. 0 times theorem prover too weak. 1913 trivial. 0 not checked. [2022-07-19 11:07:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624723470] [2022-07-19 11:07:40,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624723470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:40,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756869587] [2022-07-19 11:07:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:40,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:40,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:40,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:07:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 11:07:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:41,973 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:41,974 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 [2022-07-19 11:07:41,999 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 11:07:41,999 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 [2022-07-19 11:07:42,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 11:07:42,033 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:42,034 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 23 treesize of output 22 [2022-07-19 11:07:42,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 11:07:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 1683 proven. 240 refuted. 0 times theorem prover too weak. 2655 trivial. 0 not checked. [2022-07-19 11:07:42,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:07:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 1688 proven. 0 refuted. 0 times theorem prover too weak. 2890 trivial. 0 not checked. [2022-07-19 11:07:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756869587] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:42,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 11:07:42,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-19 11:07:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239085795] [2022-07-19 11:07:42,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:07:42,105 INFO L87 Difference]: Start difference. First operand 15881 states and 23945 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:44,118 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 [] [2022-07-19 11:07:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:44,678 INFO L93 Difference]: Finished difference Result 34069 states and 51119 transitions. [2022-07-19 11:07:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 693 [2022-07-19 11:07:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:44,697 INFO L225 Difference]: With dead ends: 34069 [2022-07-19 11:07:44,697 INFO L226 Difference]: Without dead ends: 18211 [2022-07-19 11:07:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1385 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:07:44,718 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 140 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 455 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 11:07:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2022-07-19 11:07:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 15881. [2022-07-19 11:07:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15880 states have (on average 1.488727959697733) internal successors, (23641), 15880 states have internal predecessors, (23641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 23641 transitions. [2022-07-19 11:07:44,987 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 23641 transitions. Word has length 693 [2022-07-19 11:07:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:44,987 INFO L495 AbstractCegarLoop]: Abstraction has 15881 states and 23641 transitions. [2022-07-19 11:07:44,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 23641 transitions. [2022-07-19 11:07:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-07-19 11:07:45,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:45,008 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:45,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 11:07:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:45,219 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2077505566, now seen corresponding path program 1 times [2022-07-19 11:07:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:45,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71145316] [2022-07-19 11:07:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2542 proven. 46 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2022-07-19 11:07:45,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71145316] [2022-07-19 11:07:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71145316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657215356] [2022-07-19 11:07:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:45,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:45,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:45,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:07:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 3024 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 11:07:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:46,813 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:46,813 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 [2022-07-19 11:07:46,841 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 11:07:46,842 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 [2022-07-19 11:07:46,866 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 [2022-07-19 11:07:46,883 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:46,884 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 [2022-07-19 11:07:46,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 11:07:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2537 proven. 238 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-07-19 11:07:46,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:07:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2510 proven. 0 refuted. 0 times theorem prover too weak. 2128 trivial. 0 not checked. [2022-07-19 11:07:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657215356] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:47,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 11:07:47,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-19 11:07:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092653385] [2022-07-19 11:07:47,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:47,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:07:47,018 INFO L87 Difference]: Start difference. First operand 15881 states and 23641 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:48,233 INFO L93 Difference]: Finished difference Result 34069 states and 50511 transitions. [2022-07-19 11:07:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 693 [2022-07-19 11:07:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:48,255 INFO L225 Difference]: With dead ends: 34069 [2022-07-19 11:07:48,256 INFO L226 Difference]: Without dead ends: 18211 [2022-07-19 11:07:48,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1384 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:07:48,270 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 121 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:48,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 565 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:07:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2022-07-19 11:07:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 15915. [2022-07-19 11:07:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15915 states, 15914 states have (on average 1.4876838004272968) internal successors, (23675), 15914 states have internal predecessors, (23675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15915 states to 15915 states and 23675 transitions. [2022-07-19 11:07:48,606 INFO L78 Accepts]: Start accepts. Automaton has 15915 states and 23675 transitions. Word has length 693 [2022-07-19 11:07:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:48,606 INFO L495 AbstractCegarLoop]: Abstraction has 15915 states and 23675 transitions. [2022-07-19 11:07:48,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 15915 states and 23675 transitions. [2022-07-19 11:07:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-07-19 11:07:48,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:48,629 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:48,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 11:07:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:48,843 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash 392922944, now seen corresponding path program 1 times [2022-07-19 11:07:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:48,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087130173] [2022-07-19 11:07:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 2511 proven. 0 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2022-07-19 11:07:49,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:49,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087130173] [2022-07-19 11:07:49,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087130173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:49,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:49,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013023351] [2022-07-19 11:07:49,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:49,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:49,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:49,113 INFO L87 Difference]: Start difference. First operand 15915 states and 23675 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:49,836 INFO L93 Difference]: Finished difference Result 33063 states and 49021 transitions. [2022-07-19 11:07:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 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 695 [2022-07-19 11:07:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:49,858 INFO L225 Difference]: With dead ends: 33063 [2022-07-19 11:07:49,858 INFO L226 Difference]: Without dead ends: 17171 [2022-07-19 11:07:49,870 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 [2022-07-19 11:07:49,871 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 84 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:49,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 691 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:07:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17171 states. [2022-07-19 11:07:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17171 to 15915. [2022-07-19 11:07:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15915 states, 15914 states have (on average 1.4855473168279503) internal successors, (23641), 15914 states have internal predecessors, (23641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15915 states to 15915 states and 23641 transitions. [2022-07-19 11:07:50,322 INFO L78 Accepts]: Start accepts. Automaton has 15915 states and 23641 transitions. Word has length 695 [2022-07-19 11:07:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:50,322 INFO L495 AbstractCegarLoop]: Abstraction has 15915 states and 23641 transitions. [2022-07-19 11:07:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15915 states and 23641 transitions. [2022-07-19 11:07:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-07-19 11:07:50,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:50,341 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-19 11:07:50,341 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1108902090, now seen corresponding path program 1 times [2022-07-19 11:07:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:50,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208598255] [2022-07-19 11:07:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:50,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 2441 proven. 0 refuted. 0 times theorem prover too weak. 2204 trivial. 0 not checked. [2022-07-19 11:07:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:50,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208598255] [2022-07-19 11:07:50,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208598255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:50,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:50,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603216210] [2022-07-19 11:07:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:50,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:50,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:50,570 INFO L87 Difference]: Start difference. First operand 15915 states and 23641 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:51,714 INFO L93 Difference]: Finished difference Result 33167 states and 49191 transitions. [2022-07-19 11:07:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 695 [2022-07-19 11:07:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:51,735 INFO L225 Difference]: With dead ends: 33167 [2022-07-19 11:07:51,735 INFO L226 Difference]: Without dead ends: 17275 [2022-07-19 11:07:51,748 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 [2022-07-19 11:07:51,749 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 29 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:51,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 629 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:07:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2022-07-19 11:07:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 16799. [2022-07-19 11:07:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16799 states, 16798 states have (on average 1.48225979283248) internal successors, (24899), 16798 states have internal predecessors, (24899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16799 states to 16799 states and 24899 transitions. [2022-07-19 11:07:52,021 INFO L78 Accepts]: Start accepts. Automaton has 16799 states and 24899 transitions. Word has length 695 [2022-07-19 11:07:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:52,021 INFO L495 AbstractCegarLoop]: Abstraction has 16799 states and 24899 transitions. [2022-07-19 11:07:52,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 16799 states and 24899 transitions. [2022-07-19 11:07:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2022-07-19 11:07:52,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:52,042 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-19 11:07:52,042 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash 728876478, now seen corresponding path program 1 times [2022-07-19 11:07:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:52,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6802646] [2022-07-19 11:07:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 2525 proven. 0 refuted. 0 times theorem prover too weak. 2237 trivial. 0 not checked. [2022-07-19 11:07:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6802646] [2022-07-19 11:07:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6802646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:07:52,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:07:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 11:07:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731546123] [2022-07-19 11:07:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:07:52,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:07:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:07:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:07:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:07:52,433 INFO L87 Difference]: Start difference. First operand 16799 states and 24899 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:54,439 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 [] [2022-07-19 11:07:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:07:54,846 INFO L93 Difference]: Finished difference Result 33983 states and 50348 transitions. [2022-07-19 11:07:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:07:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 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 701 [2022-07-19 11:07:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:07:54,867 INFO L225 Difference]: With dead ends: 33983 [2022-07-19 11:07:54,867 INFO L226 Difference]: Without dead ends: 17207 [2022-07-19 11:07:54,880 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 [2022-07-19 11:07:54,881 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 43 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:07:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 644 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 11:07:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17207 states. [2022-07-19 11:07:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17207 to 16799. [2022-07-19 11:07:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16799 states, 16798 states have (on average 1.48124776759138) internal successors, (24882), 16798 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16799 states to 16799 states and 24882 transitions. [2022-07-19 11:07:55,153 INFO L78 Accepts]: Start accepts. Automaton has 16799 states and 24882 transitions. Word has length 701 [2022-07-19 11:07:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:07:55,154 INFO L495 AbstractCegarLoop]: Abstraction has 16799 states and 24882 transitions. [2022-07-19 11:07:55,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:07:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16799 states and 24882 transitions. [2022-07-19 11:07:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-07-19 11:07:55,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:07:55,172 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:07:55,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-19 11:07:55,173 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:07:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:07:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1335303222, now seen corresponding path program 1 times [2022-07-19 11:07:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:07:55,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488969083] [2022-07-19 11:07:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:07:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1577 proven. 2924 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-19 11:07:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:07:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488969083] [2022-07-19 11:07:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488969083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:07:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618702922] [2022-07-19 11:07:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:07:57,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:07:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:07:57,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:07:57,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:07:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:07:59,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-19 11:07:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:07:59,338 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:59,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-19 11:07:59,457 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-19 11:07:59,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-19 11:07:59,542 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 [2022-07-19 11:07:59,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 11:07:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:07:59,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-19 11:07:59,631 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-19 11:07:59,631 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 2 case distinctions, treesize of input 41 treesize of output 60 [2022-07-19 11:07:59,641 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 11:07:59,641 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 85 treesize of output 72 [2022-07-19 11:08:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,135 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-19 11:08:00,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2022-07-19 11:08:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-19 11:08:00,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-19 11:08:00,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,215 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-19 11:08:00,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2022-07-19 11:08:00,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-19 11:08:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-19 11:08:00,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,859 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-19 11:08:00,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2022-07-19 11:08:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:00,892 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-19 11:08:00,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2022-07-19 11:08:00,938 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-19 11:08:00,938 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 73 [2022-07-19 11:08:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 310 [2022-07-19 11:08:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:01,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 310 [2022-07-19 11:08:01,883 INFO L356 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2022-07-19 11:08:01,884 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 4 case distinctions, treesize of input 388 treesize of output 407 [2022-07-19 11:08:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 288 [2022-07-19 11:08:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 288 [2022-07-19 11:08:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,656 INFO L356 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2022-07-19 11:08:14,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 373 treesize of output 370 [2022-07-19 11:08:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 71 [2022-07-19 11:08:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 49 [2022-07-19 11:08:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 11:08:14,912 INFO L356 Elim1Store]: treesize reduction 115, result has 35.4 percent of original size [2022-07-19 11:08:14,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 95 [2022-07-19 11:08:14,964 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-19 11:08:14,964 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 33 treesize of output 35 [2022-07-19 11:08:15,040 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-19 11:08:15,040 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 29 treesize of output 11 [2022-07-19 11:08:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1764 proven. 573 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2022-07-19 11:08:15,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:08:19,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 11:08:19,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 11:08:19,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 714 treesize of output 552 [2022-07-19 11:08:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 11:08:19,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 11:08:19,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 924 treesize of output 768 [2022-07-19 11:08:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1895 proven. 141 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2022-07-19 11:08:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618702922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:08:20,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:08:20,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 13] total 53 [2022-07-19 11:08:20,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336046442] [2022-07-19 11:08:20,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:08:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 11:08:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:08:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 11:08:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2452, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 11:08:20,019 INFO L87 Difference]: Start difference. First operand 16799 states and 24882 transitions. Second operand has 53 states, 53 states have (on average 17.18867924528302) internal successors, (911), 53 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:08:21,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:08:22,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:08:25,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:08:28,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:08:30,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:08:32,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:09:56,051 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 11:10:17,416 WARN L233 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 107 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 11:10:27,900 WARN L233 SmtUtils]: Spent 8.53s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 11:10:43,508 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)