./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.03.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_clnt.blast.03.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 1c5ecbc156ef402fa8ca002c27ace1df37fef4394f3f2e7d74e739b1fb38fbd5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:58:13,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:58:13,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:58:13,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:58:13,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:58:13,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:58:13,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:58:13,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:58:13,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:58:13,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:58:13,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:58:13,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:58:13,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:58:13,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:58:13,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:58:13,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:58:13,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:58:13,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:58:13,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:58:13,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:58:13,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:58:13,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:58:13,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:58:13,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:58:13,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:58:13,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:58:13,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:58:13,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:58:13,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:58:13,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:58:13,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:58:13,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:58:13,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:58:13,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:58:13,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:58:13,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:58:13,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:58:13,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:58:13,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:58:13,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:58:13,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:58:13,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:58:13,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:58:13,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:58:13,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:58:13,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:58:13,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:58:13,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:58:13,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:58:13,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:58:13,779 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:58:13,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:58:13,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:58:13,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:58:13,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:58:13,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:58:13,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:58:13,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:58:13,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:58:13,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:58:13,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:58:13,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:13,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:58:13,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:58:13,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:58:13,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:58:13,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5ecbc156ef402fa8ca002c27ace1df37fef4394f3f2e7d74e739b1fb38fbd5 [2021-12-15 08:58:13,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:58:14,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:58:14,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:58:14,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:58:14,019 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:58:14,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-1.c [2021-12-15 08:58:14,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fb8cfda/b2816054f88440f39885289fa099bc4b/FLAG68d20e6ba [2021-12-15 08:58:14,610 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:58:14,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.03.i.cil-1.c [2021-12-15 08:58:14,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fb8cfda/b2816054f88440f39885289fa099bc4b/FLAG68d20e6ba [2021-12-15 08:58:14,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6fb8cfda/b2816054f88440f39885289fa099bc4b [2021-12-15 08:58:14,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:58:14,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:58:14,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:14,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:58:14,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:58:14,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:14" (1/1) ... [2021-12-15 08:58:14,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65bebd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:14, skipping insertion in model container [2021-12-15 08:58:14,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:58:14" (1/1) ... [2021-12-15 08:58:14,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:58:15,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:58:15,372 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_clnt.blast.03.i.cil-1.c[65397,65410] [2021-12-15 08:58:15,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:15,402 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:58:15,478 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_clnt.blast.03.i.cil-1.c[65397,65410] [2021-12-15 08:58:15,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:58:15,494 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:58:15,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15 WrapperNode [2021-12-15 08:58:15,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:58:15,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:15,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:58:15,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:58:15,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,578 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-12-15 08:58:15,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:58:15,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:58:15,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:58:15,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:58:15,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:58:15,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:58:15,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:58:15,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:58:15,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (1/1) ... [2021-12-15 08:58:15,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:58:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:58:15,701 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 08:58:15,723 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 08:58:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:58:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 08:58:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:58:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:58:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 08:58:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:58:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:58:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:58:15,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:58:15,864 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:58:15,865 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:58:15,878 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 08:58:18,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-12-15 08:58:18,629 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-12-15 08:58:18,630 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:58:18,640 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:58:18,640 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:58:18,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:18 BoogieIcfgContainer [2021-12-15 08:58:18,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:58:18,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:58:18,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:58:18,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:58:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:58:14" (1/3) ... [2021-12-15 08:58:18,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556b832a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:18, skipping insertion in model container [2021-12-15 08:58:18,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:58:15" (2/3) ... [2021-12-15 08:58:18,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556b832a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:58:18, skipping insertion in model container [2021-12-15 08:58:18,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:58:18" (3/3) ... [2021-12-15 08:58:18,654 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.03.i.cil-1.c [2021-12-15 08:58:18,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:58:18,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:58:18,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:58:18,708 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 08:58:18,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:58:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 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 08:58:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 08:58:18,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:18,730 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] [2021-12-15 08:58:18,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-12-15 08:58:18,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:18,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738042309] [2021-12-15 08:58:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:18,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:19,393 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 08:58:19,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738042309] [2021-12-15 08:58:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738042309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:19,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:19,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:19,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433609132] [2021-12-15 08:58:19,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:19,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:19,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:19,450 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 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 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:58:21,486 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 08:58:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:22,032 INFO L93 Difference]: Finished difference Result 360 states and 608 transitions. [2021-12-15 08:58:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-15 08:58:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:22,050 INFO L225 Difference]: With dead ends: 360 [2021-12-15 08:58:22,050 INFO L226 Difference]: Without dead ends: 205 [2021-12-15 08:58:22,054 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 08:58:22,066 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:22,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 378 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 08:58:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-15 08:58:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-12-15 08:58:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5629629629629629) internal successors, (211), 135 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 211 transitions. [2021-12-15 08:58:22,130 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 211 transitions. Word has length 24 [2021-12-15 08:58:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:22,131 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 211 transitions. [2021-12-15 08:58:22,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:58:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 211 transitions. [2021-12-15 08:58:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:58:22,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:22,134 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] [2021-12-15 08:58:22,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:58:22,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2051408280, now seen corresponding path program 1 times [2021-12-15 08:58:22,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580311958] [2021-12-15 08:58:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:22,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:22,414 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 08:58:22,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:22,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580311958] [2021-12-15 08:58:22,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580311958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:22,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:22,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:22,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824382548] [2021-12-15 08:58:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:22,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:22,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:22,420 INFO L87 Difference]: Start difference. First operand 136 states and 211 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:58:24,438 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 08:58:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:24,626 INFO L93 Difference]: Finished difference Result 269 states and 416 transitions. [2021-12-15 08:58:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-15 08:58:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:24,627 INFO L225 Difference]: With dead ends: 269 [2021-12-15 08:58:24,627 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 08:58:24,628 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 08:58:24,629 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 7 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:58:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 08:58:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-12-15 08:58:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 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 08:58:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2021-12-15 08:58:24,637 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 25 [2021-12-15 08:58:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:24,637 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2021-12-15 08:58:24,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:58:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2021-12-15 08:58:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:58:24,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:24,639 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] [2021-12-15 08:58:24,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:58:24,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash 992174912, now seen corresponding path program 1 times [2021-12-15 08:58:24,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:24,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165779366] [2021-12-15 08:58:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:24,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:58:24,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165779366] [2021-12-15 08:58:24,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165779366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:24,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:24,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:58:24,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001596554] [2021-12-15 08:58:24,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:24,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:58:24,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:58:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:24,836 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 08:58:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:24,863 INFO L93 Difference]: Finished difference Result 393 states and 610 transitions. [2021-12-15 08:58:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:58:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 39 [2021-12-15 08:58:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:24,865 INFO L225 Difference]: With dead ends: 393 [2021-12-15 08:58:24,865 INFO L226 Difference]: Without dead ends: 264 [2021-12-15 08:58:24,866 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 08:58:24,867 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 123 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 310 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 08:58:24,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 310 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:58:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-15 08:58:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-12-15 08:58:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5361216730038023) internal successors, (404), 263 states have internal predecessors, (404), 0 states have call successors, (0), 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 08:58:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 404 transitions. [2021-12-15 08:58:24,882 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 404 transitions. Word has length 39 [2021-12-15 08:58:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:24,882 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 404 transitions. [2021-12-15 08:58:24,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 08:58:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 404 transitions. [2021-12-15 08:58:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 08:58:24,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:24,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:24,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:58:24,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1329740792, now seen corresponding path program 1 times [2021-12-15 08:58:24,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146082412] [2021-12-15 08:58:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:24,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:58:25,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146082412] [2021-12-15 08:58:25,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146082412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:25,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:25,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:58:25,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648018988] [2021-12-15 08:58:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:25,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:58:25,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:58:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:58:25,132 INFO L87 Difference]: Start difference. First operand 264 states and 404 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:58:27,139 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 08:58:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:27,188 INFO L93 Difference]: Finished difference Result 516 states and 797 transitions. [2021-12-15 08:58:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:58:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 54 [2021-12-15 08:58:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:27,191 INFO L225 Difference]: With dead ends: 516 [2021-12-15 08:58:27,191 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 08:58:27,194 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 08:58:27,195 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 122 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:27,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 461 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 08:58:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 08:58:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-12-15 08:58:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5336787564766838) internal successors, (592), 386 states have internal predecessors, (592), 0 states have call successors, (0), 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 08:58:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 592 transitions. [2021-12-15 08:58:27,218 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 592 transitions. Word has length 54 [2021-12-15 08:58:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:27,219 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 592 transitions. [2021-12-15 08:58:27,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 08:58:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 592 transitions. [2021-12-15 08:58:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 08:58:27,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:27,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:27,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:58:27,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2025585655, now seen corresponding path program 1 times [2021-12-15 08:58:27,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220289794] [2021-12-15 08:58:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:27,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:27,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220289794] [2021-12-15 08:58:27,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220289794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:27,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:27,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:27,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74473850] [2021-12-15 08:58:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:27,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:27,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:27,493 INFO L87 Difference]: Start difference. First operand 387 states and 592 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:29,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:31,517 WARN L534 Checker$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 08:58:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:31,866 INFO L93 Difference]: Finished difference Result 942 states and 1439 transitions. [2021-12-15 08:58:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:31,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 08:58:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:31,870 INFO L225 Difference]: With dead ends: 942 [2021-12-15 08:58:31,870 INFO L226 Difference]: Without dead ends: 565 [2021-12-15 08:58:31,871 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 08:58:31,871 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 91 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:31,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-15 08:58:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 439. [2021-12-15 08:58:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 0 states have call successors, (0), 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 08:58:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2021-12-15 08:58:31,885 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 72 [2021-12-15 08:58:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:31,885 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2021-12-15 08:58:31,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2021-12-15 08:58:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 08:58:31,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:31,892 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:31,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:58:31,893 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1885037045, now seen corresponding path program 1 times [2021-12-15 08:58:31,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115340128] [2021-12-15 08:58:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:31,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:32,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115340128] [2021-12-15 08:58:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115340128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:32,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:32,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:32,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738166107] [2021-12-15 08:58:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:32,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:32,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:32,162 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:34,172 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 08:58:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:34,464 INFO L93 Difference]: Finished difference Result 1139 states and 1753 transitions. [2021-12-15 08:58:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 08:58:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:34,468 INFO L225 Difference]: With dead ends: 1139 [2021-12-15 08:58:34,468 INFO L226 Difference]: Without dead ends: 710 [2021-12-15 08:58:34,469 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 08:58:34,470 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:34,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-15 08:58:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 462. [2021-12-15 08:58:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5704989154013016) internal successors, (724), 461 states have internal predecessors, (724), 0 states have call successors, (0), 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 08:58:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2021-12-15 08:58:34,483 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 72 [2021-12-15 08:58:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:34,483 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2021-12-15 08:58:34,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2021-12-15 08:58:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 08:58:34,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:34,485 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:34,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 08:58:34,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1523957901, now seen corresponding path program 1 times [2021-12-15 08:58:34,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:34,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930317789] [2021-12-15 08:58:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:34,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:34,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:34,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930317789] [2021-12-15 08:58:34,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930317789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:34,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:34,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:34,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953297411] [2021-12-15 08:58:34,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:34,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:34,693 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:36,703 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 08:58:38,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:58:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:39,039 INFO L93 Difference]: Finished difference Result 1092 states and 1701 transitions. [2021-12-15 08:58:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-15 08:58:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:39,043 INFO L225 Difference]: With dead ends: 1092 [2021-12-15 08:58:39,043 INFO L226 Difference]: Without dead ends: 640 [2021-12-15 08:58:39,044 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 08:58:39,045 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 93 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-15 08:58:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 508. [2021-12-15 08:58:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.581854043392505) internal successors, (802), 507 states have internal predecessors, (802), 0 states have call successors, (0), 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 08:58:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 802 transitions. [2021-12-15 08:58:39,057 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 802 transitions. Word has length 92 [2021-12-15 08:58:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:39,057 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 802 transitions. [2021-12-15 08:58:39,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 802 transitions. [2021-12-15 08:58:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 08:58:39,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:39,059 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:39,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:58:39,059 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1877523057, now seen corresponding path program 1 times [2021-12-15 08:58:39,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881048667] [2021-12-15 08:58:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:39,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 08:58:39,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:39,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881048667] [2021-12-15 08:58:39,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881048667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:39,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:39,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:39,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908840912] [2021-12-15 08:58:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:39,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:39,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:39,251 INFO L87 Difference]: Start difference. First operand 508 states and 802 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:41,260 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 08:58:43,277 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 08:58:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:43,535 INFO L93 Difference]: Finished difference Result 1092 states and 1718 transitions. [2021-12-15 08:58:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:43,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-15 08:58:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:43,541 INFO L225 Difference]: With dead ends: 1092 [2021-12-15 08:58:43,542 INFO L226 Difference]: Without dead ends: 594 [2021-12-15 08:58:43,543 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 08:58:43,543 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:43,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-15 08:58:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 548. [2021-12-15 08:58:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5904936014625228) internal successors, (870), 547 states have internal predecessors, (870), 0 states have call successors, (0), 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 08:58:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 870 transitions. [2021-12-15 08:58:43,557 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 870 transitions. Word has length 92 [2021-12-15 08:58:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:43,557 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 870 transitions. [2021-12-15 08:58:43,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 870 transitions. [2021-12-15 08:58:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 08:58:43,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:43,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:58:43,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash 377535094, now seen corresponding path program 1 times [2021-12-15 08:58:43,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:43,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873412677] [2021-12-15 08:58:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:43,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:58:43,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:43,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873412677] [2021-12-15 08:58:43,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873412677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:43,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:43,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:43,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266956073] [2021-12-15 08:58:43,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:43,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:43,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:43,771 INFO L87 Difference]: Start difference. First operand 548 states and 870 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:45,783 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 08:58:47,800 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 08:58:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:48,158 INFO L93 Difference]: Finished difference Result 1212 states and 1906 transitions. [2021-12-15 08:58:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:48,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-15 08:58:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:48,162 INFO L225 Difference]: With dead ends: 1212 [2021-12-15 08:58:48,162 INFO L226 Difference]: Without dead ends: 674 [2021-12-15 08:58:48,163 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 08:58:48,164 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 88 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:48,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 542 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 08:58:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-15 08:58:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 550. [2021-12-15 08:58:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5883424408014573) internal successors, (872), 549 states have internal predecessors, (872), 0 states have call successors, (0), 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 08:58:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 872 transitions. [2021-12-15 08:58:48,177 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 872 transitions. Word has length 93 [2021-12-15 08:58:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:48,178 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 872 transitions. [2021-12-15 08:58:48,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 872 transitions. [2021-12-15 08:58:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:48,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:48,191 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-12-15 08:58:48,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 08:58:48,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1171686517, now seen corresponding path program 2 times [2021-12-15 08:58:48,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:48,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581587929] [2021-12-15 08:58:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:48,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:48,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581587929] [2021-12-15 08:58:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581587929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:48,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315013836] [2021-12-15 08:58:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:48,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:48,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:48,403 INFO L87 Difference]: Start difference. First operand 550 states and 872 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:50,412 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 08:58:52,426 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 08:58:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:52,751 INFO L93 Difference]: Finished difference Result 1283 states and 1999 transitions. [2021-12-15 08:58:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:52,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:52,755 INFO L225 Difference]: With dead ends: 1283 [2021-12-15 08:58:52,755 INFO L226 Difference]: Without dead ends: 743 [2021-12-15 08:58:52,755 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 08:58:52,757 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 112 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:52,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-12-15 08:58:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 550. [2021-12-15 08:58:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.570127504553734) internal successors, (862), 549 states have internal predecessors, (862), 0 states have call successors, (0), 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 08:58:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 862 transitions. [2021-12-15 08:58:52,771 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 862 transitions. Word has length 106 [2021-12-15 08:58:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:52,772 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 862 transitions. [2021-12-15 08:58:52,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 862 transitions. [2021-12-15 08:58:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:52,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:52,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:52,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 08:58:52,774 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1788158099, now seen corresponding path program 1 times [2021-12-15 08:58:52,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:52,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409937902] [2021-12-15 08:58:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:52,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:52,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:52,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409937902] [2021-12-15 08:58:52,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409937902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:52,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:52,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359615238] [2021-12-15 08:58:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:52,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:52,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:52,990 INFO L87 Difference]: Start difference. First operand 550 states and 862 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:54,998 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 08:58:57,014 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 08:58:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:57,341 INFO L93 Difference]: Finished difference Result 1212 states and 1884 transitions. [2021-12-15 08:58:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:57,344 INFO L225 Difference]: With dead ends: 1212 [2021-12-15 08:58:57,344 INFO L226 Difference]: Without dead ends: 672 [2021-12-15 08:58:57,345 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 08:58:57,345 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:57,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 538 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:58:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-15 08:58:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 550. [2021-12-15 08:58:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5664845173041895) internal successors, (860), 549 states have internal predecessors, (860), 0 states have call successors, (0), 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 08:58:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-12-15 08:58:57,358 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 106 [2021-12-15 08:58:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:57,358 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-12-15 08:58:57,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-12-15 08:58:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:58:57,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:57,360 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:57,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 08:58:57,361 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1946109419, now seen corresponding path program 1 times [2021-12-15 08:58:57,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:57,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023132028] [2021-12-15 08:58:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:57,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:58:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:58:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:58:57,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:58:57,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023132028] [2021-12-15 08:58:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023132028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:58:57,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:58:57,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:58:57,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853238100] [2021-12-15 08:58:57,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:58:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:58:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:58:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:58:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:58:57,566 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:59,577 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 08:58:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:58:59,869 INFO L93 Difference]: Finished difference Result 1284 states and 1976 transitions. [2021-12-15 08:58:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:58:59,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:58:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:58:59,872 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 08:58:59,872 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 08:58:59,873 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 08:58:59,873 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 119 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:58:59,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:58:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 08:58:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 08:58:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5519125683060109) internal successors, (852), 549 states have internal predecessors, (852), 0 states have call successors, (0), 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 08:58:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 852 transitions. [2021-12-15 08:58:59,891 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 852 transitions. Word has length 106 [2021-12-15 08:58:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:58:59,891 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 852 transitions. [2021-12-15 08:58:59,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:58:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 852 transitions. [2021-12-15 08:58:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:58:59,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:58:59,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:58:59,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:58:59,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:58:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:58:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1275446372, now seen corresponding path program 1 times [2021-12-15 08:58:59,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:58:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963716273] [2021-12-15 08:58:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:58:59,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:00,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963716273] [2021-12-15 08:59:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963716273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:00,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:00,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:00,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594551855] [2021-12-15 08:59:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:00,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:00,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:00,102 INFO L87 Difference]: Start difference. First operand 550 states and 852 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:02,112 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 08:59:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:02,398 INFO L93 Difference]: Finished difference Result 1284 states and 1960 transitions. [2021-12-15 08:59:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 08:59:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:02,401 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 08:59:02,401 INFO L226 Difference]: Without dead ends: 744 [2021-12-15 08:59:02,402 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 08:59:02,403 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 117 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:02,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 286 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-15 08:59:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 550. [2021-12-15 08:59:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.5336976320582878) internal successors, (842), 549 states have internal predecessors, (842), 0 states have call successors, (0), 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 08:59:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 842 transitions. [2021-12-15 08:59:02,426 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 842 transitions. Word has length 107 [2021-12-15 08:59:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:02,426 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 842 transitions. [2021-12-15 08:59:02,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 842 transitions. [2021-12-15 08:59:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:59:02,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:02,428 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:59:02,429 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash 889473249, now seen corresponding path program 1 times [2021-12-15 08:59:02,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240427627] [2021-12-15 08:59:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:02,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:02,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240427627] [2021-12-15 08:59:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240427627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:02,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:02,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:02,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450024503] [2021-12-15 08:59:02,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:02,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:02,630 INFO L87 Difference]: Start difference. First operand 550 states and 842 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:04,640 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 08:59:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:04,934 INFO L93 Difference]: Finished difference Result 1167 states and 1766 transitions. [2021-12-15 08:59:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 08:59:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:04,937 INFO L225 Difference]: With dead ends: 1167 [2021-12-15 08:59:04,937 INFO L226 Difference]: Without dead ends: 819 [2021-12-15 08:59:04,938 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 08:59:04,938 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 113 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:04,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 492 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-12-15 08:59:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 598. [2021-12-15 08:59:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5142378559463987) internal successors, (904), 597 states have internal predecessors, (904), 0 states have call successors, (0), 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 08:59:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 904 transitions. [2021-12-15 08:59:04,954 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 904 transitions. Word has length 107 [2021-12-15 08:59:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:04,954 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 904 transitions. [2021-12-15 08:59:04,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 904 transitions. [2021-12-15 08:59:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:59:04,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:04,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:04,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 08:59:04,957 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2005302672, now seen corresponding path program 1 times [2021-12-15 08:59:04,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:04,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843013087] [2021-12-15 08:59:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:04,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:59:05,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843013087] [2021-12-15 08:59:05,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843013087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:05,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:05,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:05,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307623172] [2021-12-15 08:59:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:05,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:05,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:05,200 INFO L87 Difference]: Start difference. First operand 598 states and 904 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 08:59:07,210 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 08:59:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:07,518 INFO L93 Difference]: Finished difference Result 1461 states and 2187 transitions. [2021-12-15 08:59:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:07,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 08:59:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:07,522 INFO L225 Difference]: With dead ends: 1461 [2021-12-15 08:59:07,522 INFO L226 Difference]: Without dead ends: 873 [2021-12-15 08:59:07,525 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 08:59:07,526 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:07,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-12-15 08:59:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 712. [2021-12-15 08:59:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.5330520393811533) internal successors, (1090), 711 states have internal predecessors, (1090), 0 states have call successors, (0), 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 08:59:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1090 transitions. [2021-12-15 08:59:07,581 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1090 transitions. Word has length 107 [2021-12-15 08:59:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:07,581 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1090 transitions. [2021-12-15 08:59:07,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 08:59:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1090 transitions. [2021-12-15 08:59:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:07,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:07,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:07,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 08:59:07,584 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -386918792, now seen corresponding path program 1 times [2021-12-15 08:59:07,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679157259] [2021-12-15 08:59:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:07,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:07,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679157259] [2021-12-15 08:59:07,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679157259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:07,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:07,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:07,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094948167] [2021-12-15 08:59:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:07,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:07,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:07,787 INFO L87 Difference]: Start difference. First operand 712 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:09,797 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 08:59:11,814 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 08:59:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:12,155 INFO L93 Difference]: Finished difference Result 1536 states and 2338 transitions. [2021-12-15 08:59:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 08:59:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:12,159 INFO L225 Difference]: With dead ends: 1536 [2021-12-15 08:59:12,159 INFO L226 Difference]: Without dead ends: 834 [2021-12-15 08:59:12,160 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 08:59:12,160 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 91 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:12,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 530 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:59:12,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-15 08:59:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 712. [2021-12-15 08:59:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.530239099859353) internal successors, (1088), 711 states have internal predecessors, (1088), 0 states have call successors, (0), 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 08:59:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1088 transitions. [2021-12-15 08:59:12,178 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1088 transitions. Word has length 108 [2021-12-15 08:59:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:12,178 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1088 transitions. [2021-12-15 08:59:12,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1088 transitions. [2021-12-15 08:59:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:12,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:12,180 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:12,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 08:59:12,181 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1089441208, now seen corresponding path program 1 times [2021-12-15 08:59:12,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:12,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96568380] [2021-12-15 08:59:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:12,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:59:12,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:12,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96568380] [2021-12-15 08:59:12,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96568380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:12,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:12,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:12,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184993717] [2021-12-15 08:59:12,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:12,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:12,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:12,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:12,390 INFO L87 Difference]: Start difference. First operand 712 states and 1088 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:14,399 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 08:59:16,422 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 08:59:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:16,765 INFO L93 Difference]: Finished difference Result 1284 states and 1952 transitions. [2021-12-15 08:59:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 08:59:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:16,769 INFO L225 Difference]: With dead ends: 1284 [2021-12-15 08:59:16,770 INFO L226 Difference]: Without dead ends: 828 [2021-12-15 08:59:16,771 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 08:59:16,771 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 85 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 524 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:59:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-15 08:59:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 712. [2021-12-15 08:59:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.5274261603375527) internal successors, (1086), 711 states have internal predecessors, (1086), 0 states have call successors, (0), 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 08:59:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1086 transitions. [2021-12-15 08:59:16,789 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1086 transitions. Word has length 108 [2021-12-15 08:59:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 1086 transitions. [2021-12-15 08:59:16,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1086 transitions. [2021-12-15 08:59:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:16,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:16,791 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:16,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 08:59:16,792 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash 546201863, now seen corresponding path program 1 times [2021-12-15 08:59:16,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978464673] [2021-12-15 08:59:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:16,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:59:17,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978464673] [2021-12-15 08:59:17,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978464673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:17,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:17,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:17,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840056264] [2021-12-15 08:59:17,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:17,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:17,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:17,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:17,014 INFO L87 Difference]: Start difference. First operand 712 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:59:19,024 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 08:59:21,043 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 08:59:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:21,296 INFO L93 Difference]: Finished difference Result 1526 states and 2319 transitions. [2021-12-15 08:59:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:21,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:59:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:21,300 INFO L225 Difference]: With dead ends: 1526 [2021-12-15 08:59:21,301 INFO L226 Difference]: Without dead ends: 824 [2021-12-15 08:59:21,302 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 08:59:21,302 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 63 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:21,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 520 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 08:59:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-15 08:59:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 740. [2021-12-15 08:59:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.5345060893098783) internal successors, (1134), 739 states have internal predecessors, (1134), 0 states have call successors, (0), 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 08:59:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1134 transitions. [2021-12-15 08:59:21,320 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1134 transitions. Word has length 108 [2021-12-15 08:59:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1134 transitions. [2021-12-15 08:59:21,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:59:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1134 transitions. [2021-12-15 08:59:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 08:59:21,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:21,323 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:21,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:59:21,323 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1432649300, now seen corresponding path program 1 times [2021-12-15 08:59:21,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283739144] [2021-12-15 08:59:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:59:21,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283739144] [2021-12-15 08:59:21,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283739144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:21,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:21,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:21,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323216696] [2021-12-15 08:59:21,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:21,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:21,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:21,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:21,550 INFO L87 Difference]: Start difference. First operand 740 states and 1134 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)