./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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.01.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:58:25,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:58:25,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:58:25,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:58:25,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:58:25,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:58:25,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:58:25,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:58:25,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:58:25,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:58:25,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:58:25,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:58:25,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:58:25,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:58:25,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:58:25,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:58:25,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:58:25,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:58:25,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:58:25,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:58:25,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:58:25,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:58:25,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:58:25,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:58:25,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:58:25,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:58:25,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:58:25,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:58:25,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:58:25,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:58:25,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:58:25,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:58:25,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:58:25,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:58:25,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:58:25,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:58:25,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:58:25,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:58:25,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:58:25,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:58:25,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:58:25,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:58:25,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:58:25,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:58:25,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:58:25,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:58:25,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:58:25,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:58:25,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:58:25,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:58:25,744 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:58:25,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:58:25,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:58:25,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:58:25,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:58:25,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:58:25,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:58:25,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:58:25,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:58:25,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:58:25,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:58:25,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:25,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:58:25,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:58:25,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:58:25,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:58:25,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:58:25,750 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:58:25,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:58:25,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:58:25,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:58:25,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-12-15 08:58:26,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:58:26,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:58:26,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:58:26,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:58:26,106 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:58:26,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-12-15 08:58:26,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3290fce9/f3bd92d34b6a4d72adf080230c74b50f/FLAG227d5d117 [2021-12-15 08:58:26,575 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:58:26,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-12-15 08:58:26,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3290fce9/f3bd92d34b6a4d72adf080230c74b50f/FLAG227d5d117 [2021-12-15 08:58:26,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3290fce9/f3bd92d34b6a4d72adf080230c74b50f [2021-12-15 08:58:26,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:58:26,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:58:26,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:26,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:58:26,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:58:26,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:26" (1/1) ... [2021-12-15 08:58:26,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e85dcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:26, skipping insertion in model container [2021-12-15 08:58:26,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:26" (1/1) ... [2021-12-15 08:58:26,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:58:27,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:58:27,285 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.01.i.cil-1.c[72918,72931] [2021-12-15 08:58:27,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:27,298 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:58:27,378 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.01.i.cil-1.c[72918,72931] [2021-12-15 08:58:27,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:27,398 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:58:27,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27 WrapperNode [2021-12-15 08:58:27,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:27,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:27,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:58:27,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:58:27,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,476 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 788 [2021-12-15 08:58:27,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:27,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:58:27,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:58:27,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:58:27,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:58:27,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:58:27,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:58:27,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:58:27,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (1/1) ... [2021-12-15 08:58:27,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:58:27,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:58:27,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:58:27,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:58:27,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:58:27,756 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:58:27,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:58:27,767 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 08:58:30,396 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 08:58:30,397 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 08:58:30,397 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:58:30,402 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:58:30,402 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:58:30,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:30 BoogieIcfgContainer [2021-12-15 08:58:30,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:58:30,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:58:30,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:58:30,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:58:30,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:58:26" (1/3) ... [2021-12-15 08:58:30,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c41f361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:30, skipping insertion in model container [2021-12-15 08:58:30,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:27" (2/3) ... [2021-12-15 08:58:30,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c41f361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:30, skipping insertion in model container [2021-12-15 08:58:30,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:30" (3/3) ... [2021-12-15 08:58:30,409 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-12-15 08:58:30,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:58:30,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:58:30,443 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:58:30,448 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:58:30,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:58:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 08:58:30,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:30,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:30,467 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-12-15 08:58:30,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350616535] [2021-12-15 08:58:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:30,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:30,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350616535] [2021-12-15 08:58:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350616535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:30,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:30,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747133804] [2021-12-15 08:58:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:30,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:30,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:30,802 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 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 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:32,825 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 [] [2021-12-15 08:58:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:33,071 INFO L93 Difference]: Finished difference Result 319 states and 533 transitions. [2021-12-15 08:58:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 08:58:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:33,080 INFO L225 Difference]: With dead ends: 319 [2021-12-15 08:58:33,080 INFO L226 Difference]: Without dead ends: 162 [2021-12-15 08:58:33,082 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:33,084 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 35 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:33,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 561 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-15 08:58:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-15 08:58:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-12-15 08:58:33,115 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 48 [2021-12-15 08:58:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:33,116 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-12-15 08:58:33,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-12-15 08:58:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:58:33,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:33,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:33,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:58:33,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1669844783, now seen corresponding path program 1 times [2021-12-15 08:58:33,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:33,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844411930] [2021-12-15 08:58:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:33,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:33,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844411930] [2021-12-15 08:58:33,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844411930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:33,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:33,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:33,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408933893] [2021-12-15 08:58:33,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:33,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:33,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:33,290 INFO L87 Difference]: Start difference. First operand 145 states and 222 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) [2021-12-15 08:58:35,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:35,540 INFO L93 Difference]: Finished difference Result 286 states and 432 transitions. [2021-12-15 08:58:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:35,541 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 [2021-12-15 08:58:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:35,542 INFO L225 Difference]: With dead ends: 286 [2021-12-15 08:58:35,542 INFO L226 Difference]: Without dead ends: 162 [2021-12-15 08:58:35,543 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:35,544 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 24 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:35,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 450 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-15 08:58:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-15 08:58:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5347222222222223) internal successors, (221), 144 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 221 transitions. [2021-12-15 08:58:35,572 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 221 transitions. Word has length 61 [2021-12-15 08:58:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:35,572 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 221 transitions. [2021-12-15 08:58:35,572 INFO L471 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) [2021-12-15 08:58:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 221 transitions. [2021-12-15 08:58:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 08:58:35,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:35,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:35,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:58:35,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 911843153, now seen corresponding path program 1 times [2021-12-15 08:58:35,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884730488] [2021-12-15 08:58:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:35,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:35,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884730488] [2021-12-15 08:58:35,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884730488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:35,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:35,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:35,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538344456] [2021-12-15 08:58:35,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:35,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:35,663 INFO L87 Difference]: Start difference. First operand 145 states and 221 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) [2021-12-15 08:58:37,675 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 [] [2021-12-15 08:58:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:37,870 INFO L93 Difference]: Finished difference Result 285 states and 430 transitions. [2021-12-15 08:58:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:37,870 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 [2021-12-15 08:58:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:37,871 INFO L225 Difference]: With dead ends: 285 [2021-12-15 08:58:37,871 INFO L226 Difference]: Without dead ends: 161 [2021-12-15 08:58:37,872 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:37,873 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 21 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:37,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 452 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-15 08:58:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2021-12-15 08:58:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 144 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) [2021-12-15 08:58:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 220 transitions. [2021-12-15 08:58:37,879 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 220 transitions. Word has length 62 [2021-12-15 08:58:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 220 transitions. [2021-12-15 08:58:37,880 INFO L471 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) [2021-12-15 08:58:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 220 transitions. [2021-12-15 08:58:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 08:58:37,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:37,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:37,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:58:37,882 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1350629653, now seen corresponding path program 1 times [2021-12-15 08:58:37,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:37,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355805637] [2021-12-15 08:58:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:37,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:37,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:37,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355805637] [2021-12-15 08:58:37,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355805637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:37,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:37,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:37,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776757033] [2021-12-15 08:58:37,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:37,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:37,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:37,999 INFO L87 Difference]: Start difference. First operand 145 states and 220 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) [2021-12-15 08:58:40,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:40,336 INFO L93 Difference]: Finished difference Result 385 states and 588 transitions. [2021-12-15 08:58:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:40,336 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 [2021-12-15 08:58:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:40,338 INFO L225 Difference]: With dead ends: 385 [2021-12-15 08:58:40,338 INFO L226 Difference]: Without dead ends: 261 [2021-12-15 08:58:40,338 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:40,339 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 139 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:40,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 309 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-15 08:58:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 162. [2021-12-15 08:58:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5341614906832297) internal successors, (247), 161 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 247 transitions. [2021-12-15 08:58:40,347 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 247 transitions. Word has length 62 [2021-12-15 08:58:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:40,347 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 247 transitions. [2021-12-15 08:58:40,347 INFO L471 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) [2021-12-15 08:58:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 247 transitions. [2021-12-15 08:58:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 08:58:40,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:40,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:40,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:58:40,354 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1409691870, now seen corresponding path program 1 times [2021-12-15 08:58:40,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108959006] [2021-12-15 08:58:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:40,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:40,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108959006] [2021-12-15 08:58:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108959006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:40,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:40,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:40,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083191562] [2021-12-15 08:58:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:40,488 INFO L87 Difference]: Start difference. First operand 162 states and 247 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) [2021-12-15 08:58:42,503 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 [] [2021-12-15 08:58:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:42,654 INFO L93 Difference]: Finished difference Result 316 states and 481 transitions. [2021-12-15 08:58:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:42,655 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 [2021-12-15 08:58:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:42,656 INFO L225 Difference]: With dead ends: 316 [2021-12-15 08:58:42,656 INFO L226 Difference]: Without dead ends: 175 [2021-12-15 08:58:42,656 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:42,657 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 26 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:42,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-15 08:58:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-15 08:58:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5279503105590062) internal successors, (246), 161 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 246 transitions. [2021-12-15 08:58:42,662 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 246 transitions. Word has length 63 [2021-12-15 08:58:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:42,662 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 246 transitions. [2021-12-15 08:58:42,662 INFO L471 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) [2021-12-15 08:58:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 246 transitions. [2021-12-15 08:58:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 08:58:42,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:42,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:58:42,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash 759775670, now seen corresponding path program 1 times [2021-12-15 08:58:42,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:42,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650305754] [2021-12-15 08:58:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:42,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:42,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:42,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650305754] [2021-12-15 08:58:42,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650305754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:42,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:42,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:42,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990812822] [2021-12-15 08:58:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:42,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:42,753 INFO L87 Difference]: Start difference. First operand 162 states and 246 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) [2021-12-15 08:58:44,763 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 [] [2021-12-15 08:58:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:44,933 INFO L93 Difference]: Finished difference Result 316 states and 480 transitions. [2021-12-15 08:58:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:44,933 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 [2021-12-15 08:58:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:44,934 INFO L225 Difference]: With dead ends: 316 [2021-12-15 08:58:44,934 INFO L226 Difference]: Without dead ends: 175 [2021-12-15 08:58:44,934 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:44,935 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 24 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:44,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-15 08:58:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-15 08:58:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5217391304347827) internal successors, (245), 161 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 245 transitions. [2021-12-15 08:58:44,944 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 245 transitions. Word has length 63 [2021-12-15 08:58:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:44,946 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 245 transitions. [2021-12-15 08:58:44,946 INFO L471 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) [2021-12-15 08:58:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 245 transitions. [2021-12-15 08:58:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 08:58:44,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:44,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:44,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 08:58:44,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -538386502, now seen corresponding path program 1 times [2021-12-15 08:58:44,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054039213] [2021-12-15 08:58:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:44,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:45,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:45,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054039213] [2021-12-15 08:58:45,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054039213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:45,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:45,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:45,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446944036] [2021-12-15 08:58:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:45,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:45,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:45,022 INFO L87 Difference]: Start difference. First operand 162 states and 245 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) [2021-12-15 08:58:47,031 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 [] [2021-12-15 08:58:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:47,199 INFO L93 Difference]: Finished difference Result 316 states and 479 transitions. [2021-12-15 08:58:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:47,200 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 [2021-12-15 08:58:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:47,201 INFO L225 Difference]: With dead ends: 316 [2021-12-15 08:58:47,201 INFO L226 Difference]: Without dead ends: 175 [2021-12-15 08:58:47,201 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:47,202 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 22 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:47,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-15 08:58:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-15 08:58:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.515527950310559) internal successors, (244), 161 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 244 transitions. [2021-12-15 08:58:47,207 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 244 transitions. Word has length 64 [2021-12-15 08:58:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:47,207 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 244 transitions. [2021-12-15 08:58:47,207 INFO L471 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) [2021-12-15 08:58:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 244 transitions. [2021-12-15 08:58:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 08:58:47,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:47,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:47,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:58:47,208 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash -34985065, now seen corresponding path program 1 times [2021-12-15 08:58:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417553349] [2021-12-15 08:58:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:47,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:47,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417553349] [2021-12-15 08:58:47,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417553349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:47,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:47,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:47,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623018518] [2021-12-15 08:58:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:47,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:47,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:47,298 INFO L87 Difference]: Start difference. First operand 162 states and 244 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:49,307 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 [] [2021-12-15 08:58:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:49,586 INFO L93 Difference]: Finished difference Result 419 states and 639 transitions. [2021-12-15 08:58:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:49,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-15 08:58:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:49,588 INFO L225 Difference]: With dead ends: 419 [2021-12-15 08:58:49,588 INFO L226 Difference]: Without dead ends: 278 [2021-12-15 08:58:49,588 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:49,589 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 112 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:49,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 310 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-15 08:58:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 205. [2021-12-15 08:58:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5833333333333333) internal successors, (323), 204 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2021-12-15 08:58:49,594 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 65 [2021-12-15 08:58:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:49,594 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2021-12-15 08:58:49,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2021-12-15 08:58:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 08:58:49,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:49,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:49,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:58:49,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1305412400, now seen corresponding path program 1 times [2021-12-15 08:58:49,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980144354] [2021-12-15 08:58:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:49,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:58:49,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:49,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980144354] [2021-12-15 08:58:49,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980144354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:49,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:49,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:49,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638687120] [2021-12-15 08:58:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:49,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:49,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:49,704 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:51,715 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 [] [2021-12-15 08:58:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:52,020 INFO L93 Difference]: Finished difference Result 488 states and 769 transitions. [2021-12-15 08:58:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:52,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-15 08:58:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:52,023 INFO L225 Difference]: With dead ends: 488 [2021-12-15 08:58:52,023 INFO L226 Difference]: Without dead ends: 302 [2021-12-15 08:58:52,023 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:52,024 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:52,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 325 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-15 08:58:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 230. [2021-12-15 08:58:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.6244541484716157) internal successors, (372), 229 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 372 transitions. [2021-12-15 08:58:52,030 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 372 transitions. Word has length 66 [2021-12-15 08:58:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:52,030 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 372 transitions. [2021-12-15 08:58:52,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 372 transitions. [2021-12-15 08:58:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 08:58:52,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:52,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:52,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 08:58:52,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1115483845, now seen corresponding path program 1 times [2021-12-15 08:58:52,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:52,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729652598] [2021-12-15 08:58:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:52,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 08:58:52,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:52,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729652598] [2021-12-15 08:58:52,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729652598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:52,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:52,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:52,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918318131] [2021-12-15 08:58:52,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:52,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:52,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:52,104 INFO L87 Difference]: Start difference. First operand 230 states and 372 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:54,110 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 [] [2021-12-15 08:58:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:54,339 INFO L93 Difference]: Finished difference Result 482 states and 782 transitions. [2021-12-15 08:58:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 08:58:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:54,341 INFO L225 Difference]: With dead ends: 482 [2021-12-15 08:58:54,341 INFO L226 Difference]: Without dead ends: 273 [2021-12-15 08:58:54,341 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:54,341 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:54,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 500 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-15 08:58:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-12-15 08:58:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6294820717131475) internal successors, (409), 251 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 409 transitions. [2021-12-15 08:58:54,346 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 409 transitions. Word has length 95 [2021-12-15 08:58:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:54,347 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 409 transitions. [2021-12-15 08:58:54,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 409 transitions. [2021-12-15 08:58:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 08:58:54,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:54,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:54,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 08:58:54,350 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 464418207, now seen corresponding path program 1 times [2021-12-15 08:58:54,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577215853] [2021-12-15 08:58:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:54,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:58:54,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577215853] [2021-12-15 08:58:54,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577215853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:54,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:54,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:54,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720301924] [2021-12-15 08:58:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:54,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:54,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:54,422 INFO L87 Difference]: Start difference. First operand 252 states and 409 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:56,435 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 [] [2021-12-15 08:58:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:56,596 INFO L93 Difference]: Finished difference Result 496 states and 808 transitions. [2021-12-15 08:58:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 95 [2021-12-15 08:58:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:56,599 INFO L225 Difference]: With dead ends: 496 [2021-12-15 08:58:56,599 INFO L226 Difference]: Without dead ends: 265 [2021-12-15 08:58:56,599 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:56,600 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 20 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:56,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-15 08:58:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 252. [2021-12-15 08:58:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6254980079681276) internal successors, (408), 251 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 408 transitions. [2021-12-15 08:58:56,604 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 408 transitions. Word has length 95 [2021-12-15 08:58:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:56,604 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 408 transitions. [2021-12-15 08:58:56,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 408 transitions. [2021-12-15 08:58:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 08:58:56,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:56,605 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:56,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 08:58:56,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -74791869, now seen corresponding path program 1 times [2021-12-15 08:58:56,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215396530] [2021-12-15 08:58:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:56,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:58:56,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215396530] [2021-12-15 08:58:56,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215396530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:56,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:56,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:56,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347026873] [2021-12-15 08:58:56,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:56,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:56,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:56,708 INFO L87 Difference]: Start difference. First operand 252 states and 408 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:58,719 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 [] [2021-12-15 08:58:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:58,867 INFO L93 Difference]: Finished difference Result 486 states and 794 transitions. [2021-12-15 08:58:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 96 [2021-12-15 08:58:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:58,869 INFO L225 Difference]: With dead ends: 486 [2021-12-15 08:58:58,869 INFO L226 Difference]: Without dead ends: 255 [2021-12-15 08:58:58,869 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:58:58,869 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 11 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:58,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 472 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 08:58:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-15 08:58:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2021-12-15 08:58:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6215139442231075) internal successors, (407), 251 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 407 transitions. [2021-12-15 08:58:58,874 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 407 transitions. Word has length 96 [2021-12-15 08:58:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:58,874 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 407 transitions. [2021-12-15 08:58:58,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 407 transitions. [2021-12-15 08:58:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:58:58,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:58,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:58,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:58:58,875 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1684502399, now seen corresponding path program 1 times [2021-12-15 08:58:58,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759540790] [2021-12-15 08:58:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:58,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:58:58,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:58,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759540790] [2021-12-15 08:58:58,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759540790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:58,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:58,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:58,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741098320] [2021-12-15 08:58:58,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:58,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:58,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:58,947 INFO L87 Difference]: Start difference. First operand 252 states and 407 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:00,953 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 [] [2021-12-15 08:59:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:01,128 INFO L93 Difference]: Finished difference Result 502 states and 814 transitions. [2021-12-15 08:59:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 108 [2021-12-15 08:59:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:01,130 INFO L225 Difference]: With dead ends: 502 [2021-12-15 08:59:01,130 INFO L226 Difference]: Without dead ends: 271 [2021-12-15 08:59:01,130 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:01,131 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 474 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-15 08:59:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 252. [2021-12-15 08:59:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6175298804780875) internal successors, (406), 251 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 406 transitions. [2021-12-15 08:59:01,136 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 406 transitions. Word has length 108 [2021-12-15 08:59:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:01,136 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 406 transitions. [2021-12-15 08:59:01,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 406 transitions. [2021-12-15 08:59:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 08:59:01,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:01,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:01,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:59:01,137 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1786617495, now seen corresponding path program 1 times [2021-12-15 08:59:01,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:01,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032699835] [2021-12-15 08:59:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:01,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032699835] [2021-12-15 08:59:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032699835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:01,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:01,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853163807] [2021-12-15 08:59:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:01,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:01,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:01,222 INFO L87 Difference]: Start difference. First operand 252 states and 406 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:03,228 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 [] [2021-12-15 08:59:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:03,414 INFO L93 Difference]: Finished difference Result 501 states and 811 transitions. [2021-12-15 08:59:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 109 [2021-12-15 08:59:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:03,415 INFO L225 Difference]: With dead ends: 501 [2021-12-15 08:59:03,415 INFO L226 Difference]: Without dead ends: 270 [2021-12-15 08:59:03,416 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:03,416 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 35 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:03,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 476 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-15 08:59:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 252. [2021-12-15 08:59:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6135458167330676) internal successors, (405), 251 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 405 transitions. [2021-12-15 08:59:03,421 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 405 transitions. Word has length 109 [2021-12-15 08:59:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:03,421 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 405 transitions. [2021-12-15 08:59:03,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 405 transitions. [2021-12-15 08:59:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 08:59:03,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:03,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:03,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 08:59:03,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1202868242, now seen corresponding path program 1 times [2021-12-15 08:59:03,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:03,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093713941] [2021-12-15 08:59:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:03,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:03,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093713941] [2021-12-15 08:59:03,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093713941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:03,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:03,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:03,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660671400] [2021-12-15 08:59:03,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:03,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:03,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:03,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:03,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:03,516 INFO L87 Difference]: Start difference. First operand 252 states and 405 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:05,531 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 [] [2021-12-15 08:59:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:05,818 INFO L93 Difference]: Finished difference Result 554 states and 881 transitions. [2021-12-15 08:59:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 08:59:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:05,819 INFO L225 Difference]: With dead ends: 554 [2021-12-15 08:59:05,819 INFO L226 Difference]: Without dead ends: 323 [2021-12-15 08:59:05,820 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:05,820 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 143 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:05,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-15 08:59:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-15 08:59:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6015936254980079) internal successors, (402), 251 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 402 transitions. [2021-12-15 08:59:05,825 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 402 transitions. Word has length 110 [2021-12-15 08:59:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:05,825 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 402 transitions. [2021-12-15 08:59:05,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 402 transitions. [2021-12-15 08:59:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 08:59:05,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:05,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:05,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 08:59:05,826 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1803417690, now seen corresponding path program 1 times [2021-12-15 08:59:05,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:05,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345258490] [2021-12-15 08:59:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:05,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:05,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:05,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345258490] [2021-12-15 08:59:05,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345258490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:05,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:05,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:05,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425929363] [2021-12-15 08:59:05,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:05,896 INFO L87 Difference]: Start difference. First operand 252 states and 402 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:07,901 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 [] [2021-12-15 08:59:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:08,079 INFO L93 Difference]: Finished difference Result 500 states and 802 transitions. [2021-12-15 08:59:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 08:59:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:08,080 INFO L225 Difference]: With dead ends: 500 [2021-12-15 08:59:08,080 INFO L226 Difference]: Without dead ends: 269 [2021-12-15 08:59:08,081 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:08,081 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 39 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:08,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 478 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-15 08:59:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 252. [2021-12-15 08:59:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.597609561752988) internal successors, (401), 251 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 401 transitions. [2021-12-15 08:59:08,086 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 401 transitions. Word has length 110 [2021-12-15 08:59:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 401 transitions. [2021-12-15 08:59:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 401 transitions. [2021-12-15 08:59:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 08:59:08,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:08,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 08:59:08,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -664004846, now seen corresponding path program 1 times [2021-12-15 08:59:08,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780754886] [2021-12-15 08:59:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:08,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:08,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:08,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780754886] [2021-12-15 08:59:08,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780754886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:08,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:08,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:08,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304641652] [2021-12-15 08:59:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:08,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:08,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:08,167 INFO L87 Difference]: Start difference. First operand 252 states and 401 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:10,172 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 [] [2021-12-15 08:59:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:10,450 INFO L93 Difference]: Finished difference Result 554 states and 873 transitions. [2021-12-15 08:59:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 08:59:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:10,452 INFO L225 Difference]: With dead ends: 554 [2021-12-15 08:59:10,452 INFO L226 Difference]: Without dead ends: 323 [2021-12-15 08:59:10,453 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:10,453 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 140 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-15 08:59:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-15 08:59:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5856573705179282) internal successors, (398), 251 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 398 transitions. [2021-12-15 08:59:10,457 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 398 transitions. Word has length 111 [2021-12-15 08:59:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 398 transitions. [2021-12-15 08:59:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 398 transitions. [2021-12-15 08:59:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 08:59:10,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:10,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:10,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 08:59:10,459 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1948427051, now seen corresponding path program 1 times [2021-12-15 08:59:10,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081827461] [2021-12-15 08:59:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:10,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:10,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081827461] [2021-12-15 08:59:10,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081827461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:10,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:10,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:10,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556952405] [2021-12-15 08:59:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:10,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:10,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:10,569 INFO L87 Difference]: Start difference. First operand 252 states and 398 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:12,585 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 [] [2021-12-15 08:59:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:13,004 INFO L93 Difference]: Finished difference Result 554 states and 867 transitions. [2021-12-15 08:59:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 08:59:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:13,015 INFO L225 Difference]: With dead ends: 554 [2021-12-15 08:59:13,015 INFO L226 Difference]: Without dead ends: 323 [2021-12-15 08:59:13,015 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:13,016 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 138 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:13,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 08:59:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-15 08:59:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-15 08:59:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5737051792828685) internal successors, (395), 251 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 395 transitions. [2021-12-15 08:59:13,021 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 395 transitions. Word has length 112 [2021-12-15 08:59:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:13,023 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 395 transitions. [2021-12-15 08:59:13,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 395 transitions. [2021-12-15 08:59:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 08:59:13,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:13,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:13,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:59:13,025 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:13,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1315157961, now seen corresponding path program 1 times [2021-12-15 08:59:13,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:13,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55658542] [2021-12-15 08:59:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:13,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:13,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55658542] [2021-12-15 08:59:13,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55658542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:13,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:13,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:13,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763346346] [2021-12-15 08:59:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:13,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:13,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:13,103 INFO L87 Difference]: Start difference. First operand 252 states and 395 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:13,762 INFO L93 Difference]: Finished difference Result 490 states and 775 transitions. [2021-12-15 08:59:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-15 08:59:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:13,764 INFO L225 Difference]: With dead ends: 490 [2021-12-15 08:59:13,764 INFO L226 Difference]: Without dead ends: 259 [2021-12-15 08:59:13,764 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:13,764 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 26 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:13,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 492 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-15 08:59:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-12-15 08:59:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5697211155378485) internal successors, (394), 251 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 394 transitions. [2021-12-15 08:59:13,768 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 394 transitions. Word has length 113 [2021-12-15 08:59:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:13,768 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 394 transitions. [2021-12-15 08:59:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 394 transitions. [2021-12-15 08:59:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-15 08:59:13,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:13,769 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-12-15 08:59:13,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 08:59:13,770 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:13,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1545905064, now seen corresponding path program 1 times [2021-12-15 08:59:13,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:13,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157562997] [2021-12-15 08:59:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:13,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 08:59:13,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157562997] [2021-12-15 08:59:13,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157562997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:13,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:13,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560432978] [2021-12-15 08:59:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:13,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:13,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:13,883 INFO L87 Difference]: Start difference. First operand 252 states and 394 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:15,889 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 [] [2021-12-15 08:59:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:16,086 INFO L93 Difference]: Finished difference Result 532 states and 834 transitions. [2021-12-15 08:59:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 117 [2021-12-15 08:59:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:16,088 INFO L225 Difference]: With dead ends: 532 [2021-12-15 08:59:16,088 INFO L226 Difference]: Without dead ends: 301 [2021-12-15 08:59:16,088 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:16,088 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 36 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:16,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 512 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-15 08:59:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 277. [2021-12-15 08:59:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.568840579710145) internal successors, (433), 276 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 433 transitions. [2021-12-15 08:59:16,093 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 433 transitions. Word has length 117 [2021-12-15 08:59:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:16,093 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 433 transitions. [2021-12-15 08:59:16,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 433 transitions. [2021-12-15 08:59:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-15 08:59:16,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:16,094 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-12-15 08:59:16,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 08:59:16,094 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1861839386, now seen corresponding path program 1 times [2021-12-15 08:59:16,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:16,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334511381] [2021-12-15 08:59:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:16,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:16,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334511381] [2021-12-15 08:59:16,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334511381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:16,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:16,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:16,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851028791] [2021-12-15 08:59:16,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:16,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:16,196 INFO L87 Difference]: Start difference. First operand 277 states and 433 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,204 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 [] [2021-12-15 08:59:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:18,466 INFO L93 Difference]: Finished difference Result 625 states and 981 transitions. [2021-12-15 08:59:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 117 [2021-12-15 08:59:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:18,468 INFO L225 Difference]: With dead ends: 625 [2021-12-15 08:59:18,468 INFO L226 Difference]: Without dead ends: 369 [2021-12-15 08:59:18,468 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:18,469 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 83 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:18,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 496 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-15 08:59:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 310. [2021-12-15 08:59:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5792880258899675) internal successors, (488), 309 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 488 transitions. [2021-12-15 08:59:18,474 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 488 transitions. Word has length 117 [2021-12-15 08:59:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:18,474 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 488 transitions. [2021-12-15 08:59:18,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 488 transitions. [2021-12-15 08:59:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 08:59:18,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:18,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 08:59:18,475 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 187771396, now seen corresponding path program 1 times [2021-12-15 08:59:18,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:18,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107840069] [2021-12-15 08:59:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:18,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 08:59:18,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107840069] [2021-12-15 08:59:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107840069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:18,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:18,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:59:18,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161999880] [2021-12-15 08:59:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:59:18,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:59:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:59:18,561 INFO L87 Difference]: Start difference. First operand 310 states and 488 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:18,583 INFO L93 Difference]: Finished difference Result 882 states and 1408 transitions. [2021-12-15 08:59:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:59:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 [2021-12-15 08:59:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:18,585 INFO L225 Difference]: With dead ends: 882 [2021-12-15 08:59:18,586 INFO L226 Difference]: Without dead ends: 593 [2021-12-15 08:59:18,586 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:18,587 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 135 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:18,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 558 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:59:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-15 08:59:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-12-15 08:59:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.5861486486486487) internal successors, (939), 592 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 939 transitions. [2021-12-15 08:59:18,596 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 939 transitions. Word has length 128 [2021-12-15 08:59:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 939 transitions. [2021-12-15 08:59:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 939 transitions. [2021-12-15 08:59:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 08:59:18,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:18,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:18,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 08:59:18,598 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1081257734, now seen corresponding path program 1 times [2021-12-15 08:59:18,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:18,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193069253] [2021-12-15 08:59:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:18,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:18,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193069253] [2021-12-15 08:59:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193069253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:18,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:18,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:59:18,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299744471] [2021-12-15 08:59:18,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:18,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:59:18,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:59:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:59:18,666 INFO L87 Difference]: Start difference. First operand 593 states and 939 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-12-15 08:59:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:18,688 INFO L93 Difference]: Finished difference Result 1407 states and 2237 transitions. [2021-12-15 08:59:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:59:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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 [2021-12-15 08:59:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:18,691 INFO L225 Difference]: With dead ends: 1407 [2021-12-15 08:59:18,691 INFO L226 Difference]: Without dead ends: 835 [2021-12-15 08:59:18,692 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:18,693 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 138 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:18,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 431 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:59:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-15 08:59:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2021-12-15 08:59:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.579136690647482) internal successors, (1317), 834 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1317 transitions. [2021-12-15 08:59:18,727 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1317 transitions. Word has length 128 [2021-12-15 08:59:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:18,728 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1317 transitions. [2021-12-15 08:59:18,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 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) [2021-12-15 08:59:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1317 transitions. [2021-12-15 08:59:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 08:59:18,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:18,729 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:18,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 08:59:18,730 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 494981512, now seen corresponding path program 1 times [2021-12-15 08:59:18,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200457216] [2021-12-15 08:59:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:18,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 08:59:18,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200457216] [2021-12-15 08:59:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200457216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:18,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:18,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:59:18,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006357211] [2021-12-15 08:59:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:59:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:59:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:59:18,797 INFO L87 Difference]: Start difference. First operand 835 states and 1317 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) [2021-12-15 08:59:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:18,815 INFO L93 Difference]: Finished difference Result 1676 states and 2646 transitions. [2021-12-15 08:59:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:59:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 08:59:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:18,818 INFO L225 Difference]: With dead ends: 1676 [2021-12-15 08:59:18,818 INFO L226 Difference]: Without dead ends: 862 [2021-12-15 08:59:18,820 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:18,820 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:18,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 404 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:59:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-15 08:59:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-15 08:59:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.570267131242741) internal successors, (1352), 861 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1352 transitions. [2021-12-15 08:59:18,834 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1352 transitions. Word has length 128 [2021-12-15 08:59:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:18,834 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1352 transitions. [2021-12-15 08:59:18,834 INFO L471 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) [2021-12-15 08:59:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1352 transitions. [2021-12-15 08:59:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 08:59:18,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:18,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:18,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 08:59:18,836 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1646878966, now seen corresponding path program 1 times [2021-12-15 08:59:18,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:18,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475893112] [2021-12-15 08:59:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:18,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 08:59:18,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475893112] [2021-12-15 08:59:18,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475893112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:18,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:18,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:59:18,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710368630] [2021-12-15 08:59:18,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:18,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:59:18,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:59:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:59:18,914 INFO L87 Difference]: Start difference. First operand 862 states and 1352 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) [2021-12-15 08:59:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:18,928 INFO L93 Difference]: Finished difference Result 1705 states and 2682 transitions. [2021-12-15 08:59:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:59:18,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 08:59:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:18,931 INFO L225 Difference]: With dead ends: 1705 [2021-12-15 08:59:18,931 INFO L226 Difference]: Without dead ends: 864 [2021-12-15 08:59:18,932 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:18,933 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 4 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:18,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:59:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-12-15 08:59:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2021-12-15 08:59:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.5689455388180764) internal successors, (1354), 863 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1354 transitions. [2021-12-15 08:59:18,949 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1354 transitions. Word has length 128 [2021-12-15 08:59:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:18,949 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1354 transitions. [2021-12-15 08:59:18,950 INFO L471 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) [2021-12-15 08:59:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1354 transitions. [2021-12-15 08:59:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 08:59:18,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:18,952 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-12-15 08:59:18,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 08:59:18,952 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1600457521, now seen corresponding path program 1 times [2021-12-15 08:59:18,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570139794] [2021-12-15 08:59:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:18,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 08:59:19,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570139794] [2021-12-15 08:59:19,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570139794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:19,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:19,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:19,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215437890] [2021-12-15 08:59:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:19,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:19,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:19,058 INFO L87 Difference]: Start difference. First operand 864 states and 1354 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:21,071 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 [] [2021-12-15 08:59:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:21,356 INFO L93 Difference]: Finished difference Result 2038 states and 3176 transitions. [2021-12-15 08:59:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-15 08:59:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:21,359 INFO L225 Difference]: With dead ends: 2038 [2021-12-15 08:59:21,360 INFO L226 Difference]: Without dead ends: 1197 [2021-12-15 08:59:21,361 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:21,361 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 111 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:21,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 321 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-15 08:59:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 984. [2021-12-15 08:59:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.5859613428280772) internal successors, (1559), 983 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1559 transitions. [2021-12-15 08:59:21,377 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1559 transitions. Word has length 197 [2021-12-15 08:59:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:21,377 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1559 transitions. [2021-12-15 08:59:21,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1559 transitions. [2021-12-15 08:59:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-15 08:59:21,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:21,379 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-12-15 08:59:21,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 08:59:21,379 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash -332455056, now seen corresponding path program 1 times [2021-12-15 08:59:21,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477479590] [2021-12-15 08:59:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:21,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-15 08:59:21,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477479590] [2021-12-15 08:59:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477479590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:21,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:21,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:21,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309805907] [2021-12-15 08:59:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:21,496 INFO L87 Difference]: Start difference. First operand 984 states and 1559 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,502 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 [] [2021-12-15 08:59:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:23,825 INFO L93 Difference]: Finished difference Result 2056 states and 3232 transitions. [2021-12-15 08:59:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-12-15 08:59:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:23,828 INFO L225 Difference]: With dead ends: 2056 [2021-12-15 08:59:23,828 INFO L226 Difference]: Without dead ends: 1095 [2021-12-15 08:59:23,829 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:23,830 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 80 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:23,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 629 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-12-15 08:59:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 984. [2021-12-15 08:59:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.5839267548321465) internal successors, (1557), 983 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1557 transitions. [2021-12-15 08:59:23,844 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1557 transitions. Word has length 198 [2021-12-15 08:59:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:23,845 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1557 transitions. [2021-12-15 08:59:23,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1557 transitions. [2021-12-15 08:59:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 08:59:23,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:23,847 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:23,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 08:59:23,847 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:23,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2066283644, now seen corresponding path program 1 times [2021-12-15 08:59:23,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:23,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39423899] [2021-12-15 08:59:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:23,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 08:59:23,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39423899] [2021-12-15 08:59:23,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39423899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:23,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:23,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:23,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862632385] [2021-12-15 08:59:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:23,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:23,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:23,962 INFO L87 Difference]: Start difference. First operand 984 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:25,967 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 [] [2021-12-15 08:59:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:26,228 INFO L93 Difference]: Finished difference Result 2162 states and 3411 transitions. [2021-12-15 08:59:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-15 08:59:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:26,232 INFO L225 Difference]: With dead ends: 2162 [2021-12-15 08:59:26,232 INFO L226 Difference]: Without dead ends: 1201 [2021-12-15 08:59:26,233 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:26,233 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 57 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:26,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 585 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-12-15 08:59:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1080. [2021-12-15 08:59:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 1.5931417979610751) internal successors, (1719), 1079 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1719 transitions. [2021-12-15 08:59:26,268 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1719 transitions. Word has length 211 [2021-12-15 08:59:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:26,269 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1719 transitions. [2021-12-15 08:59:26,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1719 transitions. [2021-12-15 08:59:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-15 08:59:26,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:26,271 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-12-15 08:59:26,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 08:59:26,271 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash -406783266, now seen corresponding path program 1 times [2021-12-15 08:59:26,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355649421] [2021-12-15 08:59:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:26,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 08:59:26,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355649421] [2021-12-15 08:59:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355649421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:26,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:26,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:26,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468870240] [2021-12-15 08:59:26,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:26,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:26,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:26,388 INFO L87 Difference]: Start difference. First operand 1080 states and 1719 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:28,393 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 [] [2021-12-15 08:59:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:28,665 INFO L93 Difference]: Finished difference Result 2246 states and 3550 transitions. [2021-12-15 08:59:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 212 [2021-12-15 08:59:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:28,668 INFO L225 Difference]: With dead ends: 2246 [2021-12-15 08:59:28,668 INFO L226 Difference]: Without dead ends: 1189 [2021-12-15 08:59:28,669 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:28,670 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 101 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:28,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 627 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-12-15 08:59:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1080. [2021-12-15 08:59:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 1.5912882298424467) internal successors, (1717), 1079 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1717 transitions. [2021-12-15 08:59:28,735 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1717 transitions. Word has length 212 [2021-12-15 08:59:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1717 transitions. [2021-12-15 08:59:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1717 transitions. [2021-12-15 08:59:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-15 08:59:28,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:28,739 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:28,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 08:59:28,739 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1485610527, now seen corresponding path program 1 times [2021-12-15 08:59:28,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949582271] [2021-12-15 08:59:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:28,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 08:59:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949582271] [2021-12-15 08:59:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949582271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:28,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:28,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:28,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667227033] [2021-12-15 08:59:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:28,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:28,880 INFO L87 Difference]: Start difference. First operand 1080 states and 1717 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:30,887 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 [] [2021-12-15 08:59:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:31,114 INFO L93 Difference]: Finished difference Result 2221 states and 3524 transitions. [2021-12-15 08:59:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-15 08:59:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:31,118 INFO L225 Difference]: With dead ends: 2221 [2021-12-15 08:59:31,118 INFO L226 Difference]: Without dead ends: 1164 [2021-12-15 08:59:31,119 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:31,119 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 19 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:31,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 540 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-15 08:59:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1128. [2021-12-15 08:59:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5847382431233363) internal successors, (1786), 1127 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1786 transitions. [2021-12-15 08:59:31,135 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1786 transitions. Word has length 213 [2021-12-15 08:59:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:31,136 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1786 transitions. [2021-12-15 08:59:31,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1786 transitions. [2021-12-15 08:59:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-15 08:59:31,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:31,138 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:31,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 08:59:31,138 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash -684567724, now seen corresponding path program 1 times [2021-12-15 08:59:31,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:31,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528000210] [2021-12-15 08:59:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:31,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 08:59:31,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528000210] [2021-12-15 08:59:31,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528000210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:31,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:31,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:31,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072373914] [2021-12-15 08:59:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:31,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:31,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:31,263 INFO L87 Difference]: Start difference. First operand 1128 states and 1786 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:33,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:33,571 INFO L93 Difference]: Finished difference Result 2342 states and 3684 transitions. [2021-12-15 08:59:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-12-15 08:59:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:33,574 INFO L225 Difference]: With dead ends: 2342 [2021-12-15 08:59:33,574 INFO L226 Difference]: Without dead ends: 1237 [2021-12-15 08:59:33,576 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:33,576 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 106 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:33,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 625 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-15 08:59:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1128. [2021-12-15 08:59:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.582963620230701) internal successors, (1784), 1127 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1784 transitions. [2021-12-15 08:59:33,592 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1784 transitions. Word has length 214 [2021-12-15 08:59:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:33,592 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1784 transitions. [2021-12-15 08:59:33,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1784 transitions. [2021-12-15 08:59:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-15 08:59:33,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:33,594 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:33,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 08:59:33,594 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1845256553, now seen corresponding path program 1 times [2021-12-15 08:59:33,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197819305] [2021-12-15 08:59:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:33,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 08:59:33,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197819305] [2021-12-15 08:59:33,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197819305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:33,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:33,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:33,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256941661] [2021-12-15 08:59:33,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:33,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:33,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:33,704 INFO L87 Difference]: Start difference. First operand 1128 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:35,715 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 [] [2021-12-15 08:59:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:36,018 INFO L93 Difference]: Finished difference Result 2322 states and 3654 transitions. [2021-12-15 08:59:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-12-15 08:59:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:36,021 INFO L225 Difference]: With dead ends: 2322 [2021-12-15 08:59:36,022 INFO L226 Difference]: Without dead ends: 1217 [2021-12-15 08:59:36,024 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:59:36,024 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 95 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:36,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 611 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-15 08:59:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1128. [2021-12-15 08:59:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5811889973380657) internal successors, (1782), 1127 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1782 transitions. [2021-12-15 08:59:36,046 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1782 transitions. Word has length 217 [2021-12-15 08:59:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:36,046 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1782 transitions. [2021-12-15 08:59:36,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1782 transitions. [2021-12-15 08:59:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-15 08:59:36,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:36,049 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 08:59:36,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 08:59:36,049 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 736609869, now seen corresponding path program 1 times [2021-12-15 08:59:36,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:36,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699175938] [2021-12-15 08:59:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:36,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 08:59:36,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699175938] [2021-12-15 08:59:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699175938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:36,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:36,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:36,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994936093] [2021-12-15 08:59:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:36,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:36,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:36,150 INFO L87 Difference]: Start difference. First operand 1128 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:38,163 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 []