./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:02:21,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:02:21,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:02:21,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:02:21,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:02:21,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:02:21,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:02:21,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:02:21,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:02:21,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:02:21,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:02:21,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:02:21,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:02:21,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:02:21,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:02:21,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:02:21,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:02:21,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:02:21,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:02:21,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:02:21,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:02:21,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:02:21,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:02:21,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:02:21,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:02:21,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:02:21,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:02:21,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:02:21,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:02:21,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:02:21,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:02:21,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:02:21,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:02:21,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:02:21,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:02:21,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:02:21,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:02:21,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:02:21,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:02:21,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:02:21,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:02:21,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:02:21,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:02:21,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:02:21,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:02:21,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:02:21,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:02:21,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:02:21,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:02:21,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:02:21,771 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:02:21,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:02:21,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:02:21,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:02:21,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:02:21,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:02:21,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:02:21,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:02:21,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:02:21,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:02:21,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:21,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:02:21,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:02:21,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:02:21,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:02:21,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-12-15 22:02:21,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:02:21,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:02:22,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:02:22,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:02:22,002 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:02:22,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-12-15 22:02:22,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33ab9e0d3/2663f86ad23744a986d70b06ea053045/FLAGd06239e7e [2021-12-15 22:02:22,500 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:02:22,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-12-15 22:02:22,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33ab9e0d3/2663f86ad23744a986d70b06ea053045/FLAGd06239e7e [2021-12-15 22:02:22,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33ab9e0d3/2663f86ad23744a986d70b06ea053045 [2021-12-15 22:02:22,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:02:22,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:02:22,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:22,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:02:22,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:02:22,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:22" (1/1) ... [2021-12-15 22:02:22,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46611fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:22, skipping insertion in model container [2021-12-15 22:02:22,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:22" (1/1) ... [2021-12-15 22:02:22,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:02:22,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:02:22,883 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-12-15 22:02:22,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:22,899 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:02:22,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-12-15 22:02:22,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:23,001 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:02:23,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23 WrapperNode [2021-12-15 22:02:23,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:23,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:23,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:02:23,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:02:23,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,080 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 803 [2021-12-15 22:02:23,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:23,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:02:23,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:02:23,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:02:23,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:02:23,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:02:23,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:02:23,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:02:23,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (1/1) ... [2021-12-15 22:02:23,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:02:23,192 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 22:02:23,199 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 22:02:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:02:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 22:02:23,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 22:02:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 22:02:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 22:02:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:02:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 22:02:23,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:02:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:02:23,350 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:02:23,351 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:02:23,368 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 22:02:25,479 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 22:02:25,479 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 22:02:25,480 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:02:25,489 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:02:25,489 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:02:25,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:25 BoogieIcfgContainer [2021-12-15 22:02:25,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:02:25,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:02:25,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:02:25,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:02:25,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:02:22" (1/3) ... [2021-12-15 22:02:25,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b0c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:25, skipping insertion in model container [2021-12-15 22:02:25,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:23" (2/3) ... [2021-12-15 22:02:25,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b0c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:25, skipping insertion in model container [2021-12-15 22:02:25,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:25" (3/3) ... [2021-12-15 22:02:25,503 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-12-15 22:02:25,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:02:25,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:02:25,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:02:25,556 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 22:02:25,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:02:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 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 22:02:25,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 22:02:25,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:25,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:25,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 918516044, now seen corresponding path program 1 times [2021-12-15 22:02:25,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:25,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177968872] [2021-12-15 22:02:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:25,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:25,973 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 22:02:25,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177968872] [2021-12-15 22:02:25,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177968872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:25,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:25,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:25,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362811016] [2021-12-15 22:02:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:25,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:25,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:25,999 INFO L87 Difference]: Start difference. First operand has 155 states, 153 states have (on average 1.7254901960784315) internal successors, (264), 154 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 22:02:28,022 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 22:02:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:28,398 INFO L93 Difference]: Finished difference Result 335 states and 570 transitions. [2021-12-15 22:02:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-15 22:02:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:28,406 INFO L225 Difference]: With dead ends: 335 [2021-12-15 22:02:28,406 INFO L226 Difference]: Without dead ends: 170 [2021-12-15 22:02:28,408 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 22:02:28,410 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 36 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:28,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 615 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-15 22:02:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-12-15 22:02:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5723684210526316) internal successors, (239), 152 states have internal predecessors, (239), 0 states have call successors, (0), 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 22:02:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 239 transitions. [2021-12-15 22:02:28,457 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 239 transitions. Word has length 44 [2021-12-15 22:02:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:28,457 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 239 transitions. [2021-12-15 22:02:28,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 22:02:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 239 transitions. [2021-12-15 22:02:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 22:02:28,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:28,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:02:28,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:28,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2003514045, now seen corresponding path program 1 times [2021-12-15 22:02:28,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:28,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498023353] [2021-12-15 22:02:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:28,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:28,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498023353] [2021-12-15 22:02:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498023353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:28,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:28,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:28,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897756416] [2021-12-15 22:02:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:28,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:28,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:28,618 INFO L87 Difference]: Start difference. First operand 153 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 22:02:30,636 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 22:02:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:30,847 INFO L93 Difference]: Finished difference Result 302 states and 466 transitions. [2021-12-15 22:02:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-15 22:02:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:30,849 INFO L225 Difference]: With dead ends: 302 [2021-12-15 22:02:30,849 INFO L226 Difference]: Without dead ends: 170 [2021-12-15 22:02:30,849 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 22:02:30,850 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 24 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:30,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 501 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-15 22:02:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 153. [2021-12-15 22:02:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 152 states have internal predecessors, (238), 0 states have call successors, (0), 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 22:02:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 238 transitions. [2021-12-15 22:02:30,857 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 238 transitions. Word has length 57 [2021-12-15 22:02:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:30,858 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 238 transitions. [2021-12-15 22:02:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 22:02:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 238 transitions. [2021-12-15 22:02:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 22:02:30,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:30,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:30,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:02:30,860 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2065525010, now seen corresponding path program 1 times [2021-12-15 22:02:30,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733537709] [2021-12-15 22:02:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:30,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:30,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:30,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733537709] [2021-12-15 22:02:30,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733537709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:30,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:30,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:30,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906398055] [2021-12-15 22:02:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:30,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:30,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:30,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:30,988 INFO L87 Difference]: Start difference. First operand 153 states and 238 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:33,003 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 22:02:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:33,377 INFO L93 Difference]: Finished difference Result 407 states and 637 transitions. [2021-12-15 22:02:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 22:02:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:33,379 INFO L225 Difference]: With dead ends: 407 [2021-12-15 22:02:33,379 INFO L226 Difference]: Without dead ends: 275 [2021-12-15 22:02:33,380 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 22:02:33,381 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 160 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:33,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 362 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:02:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-15 22:02:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 164. [2021-12-15 22:02:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 163 states have internal predecessors, (253), 0 states have call successors, (0), 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 22:02:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 253 transitions. [2021-12-15 22:02:33,388 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 253 transitions. Word has length 58 [2021-12-15 22:02:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:33,389 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 253 transitions. [2021-12-15 22:02:33,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 253 transitions. [2021-12-15 22:02:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 22:02:33,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:33,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:33,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:02:33,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1018014206, now seen corresponding path program 1 times [2021-12-15 22:02:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136569779] [2021-12-15 22:02:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136569779] [2021-12-15 22:02:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136569779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:33,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123916503] [2021-12-15 22:02:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:33,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:33,505 INFO L87 Difference]: Start difference. First operand 164 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:35,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:35,436 INFO L93 Difference]: Finished difference Result 418 states and 651 transitions. [2021-12-15 22:02:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:35,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 22:02:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:35,438 INFO L225 Difference]: With dead ends: 418 [2021-12-15 22:02:35,438 INFO L226 Difference]: Without dead ends: 275 [2021-12-15 22:02:35,438 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 22:02:35,439 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 158 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:35,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 362 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:02:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-15 22:02:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 165. [2021-12-15 22:02:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5426829268292683) internal successors, (253), 164 states have internal predecessors, (253), 0 states have call successors, (0), 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 22:02:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 253 transitions. [2021-12-15 22:02:35,446 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 253 transitions. Word has length 58 [2021-12-15 22:02:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:35,446 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 253 transitions. [2021-12-15 22:02:35,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 253 transitions. [2021-12-15 22:02:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 22:02:35,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:35,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:35,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:02:35,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -117852089, now seen corresponding path program 1 times [2021-12-15 22:02:35,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955931351] [2021-12-15 22:02:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:35,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:35,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955931351] [2021-12-15 22:02:35,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955931351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:35,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:35,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:35,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737124328] [2021-12-15 22:02:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:35,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:35,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:35,552 INFO L87 Difference]: Start difference. First operand 165 states and 253 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:37,557 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 22:02:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:37,848 INFO L93 Difference]: Finished difference Result 418 states and 649 transitions. [2021-12-15 22:02:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 22:02:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:37,850 INFO L225 Difference]: With dead ends: 418 [2021-12-15 22:02:37,850 INFO L226 Difference]: Without dead ends: 274 [2021-12-15 22:02:37,850 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 22:02:37,851 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 151 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:37,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 364 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-15 22:02:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2021-12-15 22:02:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5470588235294118) internal successors, (263), 170 states have internal predecessors, (263), 0 states have call successors, (0), 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 22:02:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 263 transitions. [2021-12-15 22:02:37,859 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 263 transitions. Word has length 58 [2021-12-15 22:02:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:37,859 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 263 transitions. [2021-12-15 22:02:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 263 transitions. [2021-12-15 22:02:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 22:02:37,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:37,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:02:37,861 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1203001223, now seen corresponding path program 1 times [2021-12-15 22:02:37,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755568691] [2021-12-15 22:02:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:37,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:37,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:37,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755568691] [2021-12-15 22:02:37,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755568691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:37,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:37,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:37,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326874268] [2021-12-15 22:02:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:37,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:37,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:37,958 INFO L87 Difference]: Start difference. First operand 171 states and 263 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:39,965 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 22:02:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:40,150 INFO L93 Difference]: Finished difference Result 334 states and 514 transitions. [2021-12-15 22:02:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:40,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-15 22:02:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:40,152 INFO L225 Difference]: With dead ends: 334 [2021-12-15 22:02:40,152 INFO L226 Difference]: Without dead ends: 184 [2021-12-15 22:02:40,152 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 22:02:40,153 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 19 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:40,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 509 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-15 22:02:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-12-15 22:02:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5411764705882354) internal successors, (262), 170 states have internal predecessors, (262), 0 states have call successors, (0), 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 22:02:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2021-12-15 22:02:40,157 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 58 [2021-12-15 22:02:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:40,157 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2021-12-15 22:02:40,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:02:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2021-12-15 22:02:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 22:02:40,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:40,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:40,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:02:40,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash -293840518, now seen corresponding path program 1 times [2021-12-15 22:02:40,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:40,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833641777] [2021-12-15 22:02:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:40,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:40,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:40,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833641777] [2021-12-15 22:02:40,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833641777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:40,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:40,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:40,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920421908] [2021-12-15 22:02:40,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:40,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:40,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:40,249 INFO L87 Difference]: Start difference. First operand 171 states and 262 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 22:02:42,255 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 22:02:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:42,521 INFO L93 Difference]: Finished difference Result 424 states and 657 transitions. [2021-12-15 22:02:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-15 22:02:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:42,522 INFO L225 Difference]: With dead ends: 424 [2021-12-15 22:02:42,522 INFO L226 Difference]: Without dead ends: 274 [2021-12-15 22:02:42,522 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 22:02:42,523 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 155 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:42,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 364 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-15 22:02:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2021-12-15 22:02:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5294117647058822) internal successors, (260), 170 states have internal predecessors, (260), 0 states have call successors, (0), 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 22:02:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 260 transitions. [2021-12-15 22:02:42,527 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 260 transitions. Word has length 59 [2021-12-15 22:02:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:42,527 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 260 transitions. [2021-12-15 22:02:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 22:02:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 260 transitions. [2021-12-15 22:02:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 22:02:42,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:42,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:42,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:02:42,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash 366566809, now seen corresponding path program 1 times [2021-12-15 22:02:42,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771565842] [2021-12-15 22:02:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:42,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:42,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771565842] [2021-12-15 22:02:42,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771565842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:42,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:42,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:42,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226539935] [2021-12-15 22:02:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:42,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:42,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:42,610 INFO L87 Difference]: Start difference. First operand 171 states and 260 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 22:02:44,615 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 22:02:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:44,803 INFO L93 Difference]: Finished difference Result 334 states and 510 transitions. [2021-12-15 22:02:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-15 22:02:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:44,806 INFO L225 Difference]: With dead ends: 334 [2021-12-15 22:02:44,806 INFO L226 Difference]: Without dead ends: 184 [2021-12-15 22:02:44,806 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 22:02:44,807 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 20 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:44,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 509 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-15 22:02:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-12-15 22:02:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5235294117647058) internal successors, (259), 170 states have internal predecessors, (259), 0 states have call successors, (0), 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 22:02:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 259 transitions. [2021-12-15 22:02:44,812 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 259 transitions. Word has length 60 [2021-12-15 22:02:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:44,812 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 259 transitions. [2021-12-15 22:02:44,812 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 22:02:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 259 transitions. [2021-12-15 22:02:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 22:02:44,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:44,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:44,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:02:44,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2037555573, now seen corresponding path program 1 times [2021-12-15 22:02:44,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887790406] [2021-12-15 22:02:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:44,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:44,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887790406] [2021-12-15 22:02:44,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887790406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:44,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:44,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:44,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222985140] [2021-12-15 22:02:44,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:44,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:44,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:44,893 INFO L87 Difference]: Start difference. First operand 171 states and 259 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:46,903 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 22:02:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:47,203 INFO L93 Difference]: Finished difference Result 424 states and 653 transitions. [2021-12-15 22:02:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:47,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 22:02:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:47,205 INFO L225 Difference]: With dead ends: 424 [2021-12-15 22:02:47,205 INFO L226 Difference]: Without dead ends: 274 [2021-12-15 22:02:47,205 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 22:02:47,206 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 152 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:47,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 364 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-15 22:02:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2021-12-15 22:02:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.511764705882353) internal successors, (257), 170 states have internal predecessors, (257), 0 states have call successors, (0), 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 22:02:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 257 transitions. [2021-12-15 22:02:47,209 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 257 transitions. Word has length 61 [2021-12-15 22:02:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:47,210 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 257 transitions. [2021-12-15 22:02:47,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 257 transitions. [2021-12-15 22:02:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 22:02:47,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:47,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:47,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:02:47,210 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1584412915, now seen corresponding path program 1 times [2021-12-15 22:02:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718101] [2021-12-15 22:02:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:47,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718101] [2021-12-15 22:02:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:47,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51356367] [2021-12-15 22:02:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:47,281 INFO L87 Difference]: Start difference. First operand 171 states and 257 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:49,286 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 22:02:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:49,587 INFO L93 Difference]: Finished difference Result 443 states and 677 transitions. [2021-12-15 22:02:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 22:02:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:49,589 INFO L225 Difference]: With dead ends: 443 [2021-12-15 22:02:49,589 INFO L226 Difference]: Without dead ends: 293 [2021-12-15 22:02:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:49,590 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:49,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 366 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-15 22:02:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 211. [2021-12-15 22:02:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5476190476190477) internal successors, (325), 210 states have internal predecessors, (325), 0 states have call successors, (0), 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 22:02:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 325 transitions. [2021-12-15 22:02:49,594 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 325 transitions. Word has length 61 [2021-12-15 22:02:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:49,595 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 325 transitions. [2021-12-15 22:02:49,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 325 transitions. [2021-12-15 22:02:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 22:02:49,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:49,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:49,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:02:49,598 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2113356404, now seen corresponding path program 1 times [2021-12-15 22:02:49,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30146319] [2021-12-15 22:02:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:49,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:49,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30146319] [2021-12-15 22:02:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30146319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:49,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:49,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728032725] [2021-12-15 22:02:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:49,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:49,674 INFO L87 Difference]: Start difference. First operand 211 states and 325 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:51,659 INFO L93 Difference]: Finished difference Result 504 states and 786 transitions. [2021-12-15 22:02:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 22:02:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:51,660 INFO L225 Difference]: With dead ends: 504 [2021-12-15 22:02:51,660 INFO L226 Difference]: Without dead ends: 314 [2021-12-15 22:02:51,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:51,661 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 127 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:51,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 384 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 22:02:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-15 22:02:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 233. [2021-12-15 22:02:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.5862068965517242) internal successors, (368), 232 states have internal predecessors, (368), 0 states have call successors, (0), 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 22:02:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 368 transitions. [2021-12-15 22:02:51,666 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 368 transitions. Word has length 62 [2021-12-15 22:02:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:51,666 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 368 transitions. [2021-12-15 22:02:51,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 368 transitions. [2021-12-15 22:02:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 22:02:51,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:51,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:51,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:02:51,667 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:51,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash -649559897, now seen corresponding path program 1 times [2021-12-15 22:02:51,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:51,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557585589] [2021-12-15 22:02:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:51,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:51,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557585589] [2021-12-15 22:02:51,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557585589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:51,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:51,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:51,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933138575] [2021-12-15 22:02:51,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:51,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:51,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:51,773 INFO L87 Difference]: Start difference. First operand 233 states and 368 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:02:53,778 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 22:02:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:54,087 INFO L93 Difference]: Finished difference Result 602 states and 960 transitions. [2021-12-15 22:02:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-15 22:02:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:54,089 INFO L225 Difference]: With dead ends: 602 [2021-12-15 22:02:54,089 INFO L226 Difference]: Without dead ends: 390 [2021-12-15 22:02:54,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:54,090 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:54,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 376 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-15 22:02:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 297. [2021-12-15 22:02:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.6013513513513513) internal successors, (474), 296 states have internal predecessors, (474), 0 states have call successors, (0), 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 22:02:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 474 transitions. [2021-12-15 22:02:54,095 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 474 transitions. Word has length 90 [2021-12-15 22:02:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:54,096 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 474 transitions. [2021-12-15 22:02:54,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:02:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 474 transitions. [2021-12-15 22:02:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 22:02:54,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:54,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:02:54,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:02:54,097 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash 296415422, now seen corresponding path program 1 times [2021-12-15 22:02:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:54,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598422906] [2021-12-15 22:02:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:54,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 22:02:54,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598422906] [2021-12-15 22:02:54,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598422906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:54,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:54,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:54,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758826375] [2021-12-15 22:02:54,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:54,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:54,179 INFO L87 Difference]: Start difference. First operand 297 states and 474 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,184 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 22:02:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:56,380 INFO L93 Difference]: Finished difference Result 614 states and 982 transitions. [2021-12-15 22:02:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 22:02:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:56,382 INFO L225 Difference]: With dead ends: 614 [2021-12-15 22:02:56,382 INFO L226 Difference]: Without dead ends: 338 [2021-12-15 22:02:56,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:56,383 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 29 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:56,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 525 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-15 22:02:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 319. [2021-12-15 22:02:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5943396226415094) internal successors, (507), 318 states have internal predecessors, (507), 0 states have call successors, (0), 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 22:02:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 507 transitions. [2021-12-15 22:02:56,388 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 507 transitions. Word has length 96 [2021-12-15 22:02:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:56,388 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 507 transitions. [2021-12-15 22:02:56,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 507 transitions. [2021-12-15 22:02:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 22:02:56,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:56,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:56,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:02:56,390 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1405092530, now seen corresponding path program 1 times [2021-12-15 22:02:56,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:56,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752154775] [2021-12-15 22:02:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:56,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 22:02:56,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:56,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752154775] [2021-12-15 22:02:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752154775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:56,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423342741] [2021-12-15 22:02:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:56,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:56,483 INFO L87 Difference]: Start difference. First operand 319 states and 507 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,495 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 22:02:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:58,769 INFO L93 Difference]: Finished difference Result 738 states and 1173 transitions. [2021-12-15 22:02:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:58,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-15 22:02:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:58,771 INFO L225 Difference]: With dead ends: 738 [2021-12-15 22:02:58,771 INFO L226 Difference]: Without dead ends: 440 [2021-12-15 22:02:58,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:02:58,772 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 150 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:58,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 384 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-15 22:02:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 335. [2021-12-15 22:02:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5718562874251496) internal successors, (525), 334 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 525 transitions. [2021-12-15 22:02:58,779 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 525 transitions. Word has length 103 [2021-12-15 22:02:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:58,779 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 525 transitions. [2021-12-15 22:02:58,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 525 transitions. [2021-12-15 22:02:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 22:02:58,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:58,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:58,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:02:58,780 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash -287328756, now seen corresponding path program 1 times [2021-12-15 22:02:58,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069033613] [2021-12-15 22:02:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:58,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 22:02:58,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069033613] [2021-12-15 22:02:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069033613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:58,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:58,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:58,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189055014] [2021-12-15 22:02:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:58,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:58,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:58,859 INFO L87 Difference]: Start difference. First operand 335 states and 525 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 22:03:00,871 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 22:03:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:01,077 INFO L93 Difference]: Finished difference Result 666 states and 1048 transitions. [2021-12-15 22:03:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:01,078 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 104 [2021-12-15 22:03:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:01,079 INFO L225 Difference]: With dead ends: 666 [2021-12-15 22:03:01,079 INFO L226 Difference]: Without dead ends: 352 [2021-12-15 22:03:01,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:01,080 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 32 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:01,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 529 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-15 22:03:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 335. [2021-12-15 22:03:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5688622754491017) internal successors, (524), 334 states have internal predecessors, (524), 0 states have call successors, (0), 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 22:03:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 524 transitions. [2021-12-15 22:03:01,085 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 524 transitions. Word has length 104 [2021-12-15 22:03:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:01,085 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 524 transitions. [2021-12-15 22:03:01,086 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 22:03:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 524 transitions. [2021-12-15 22:03:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 22:03:01,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:01,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:03:01,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:03:01,087 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash 219831121, now seen corresponding path program 1 times [2021-12-15 22:03:01,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311907738] [2021-12-15 22:03:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:01,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 22:03:01,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:01,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311907738] [2021-12-15 22:03:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311907738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:01,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362392666] [2021-12-15 22:03:01,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:01,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:01,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:01,173 INFO L87 Difference]: Start difference. First operand 335 states and 524 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 22:03:03,178 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 22:03:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:03,366 INFO L93 Difference]: Finished difference Result 656 states and 1033 transitions. [2021-12-15 22:03:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:03,366 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 112 [2021-12-15 22:03:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:03,367 INFO L225 Difference]: With dead ends: 656 [2021-12-15 22:03:03,368 INFO L226 Difference]: Without dead ends: 342 [2021-12-15 22:03:03,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:03,368 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 27 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:03,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 543 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-15 22:03:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2021-12-15 22:03:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5658682634730539) internal successors, (523), 334 states have internal predecessors, (523), 0 states have call successors, (0), 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 22:03:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 523 transitions. [2021-12-15 22:03:03,374 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 523 transitions. Word has length 112 [2021-12-15 22:03:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:03,374 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 523 transitions. [2021-12-15 22:03:03,374 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 22:03:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 523 transitions. [2021-12-15 22:03:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-15 22:03:03,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:03,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 22:03:03,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:03:03,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash -183248622, now seen corresponding path program 1 times [2021-12-15 22:03:03,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:03,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024407108] [2021-12-15 22:03:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:03,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:03,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:03,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024407108] [2021-12-15 22:03:03,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024407108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:03,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:03,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:03,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549735324] [2021-12-15 22:03:03,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:03,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:03,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:03,449 INFO L87 Difference]: Start difference. First operand 335 states and 523 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:05,463 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 22:03:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:05,738 INFO L93 Difference]: Finished difference Result 748 states and 1170 transitions. [2021-12-15 22:03:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-15 22:03:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:05,740 INFO L225 Difference]: With dead ends: 748 [2021-12-15 22:03:05,740 INFO L226 Difference]: Without dead ends: 434 [2021-12-15 22:03:05,741 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 22:03:05,741 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 88 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:05,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 497 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-15 22:03:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 374. [2021-12-15 22:03:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.5710455764075066) internal successors, (586), 373 states have internal predecessors, (586), 0 states have call successors, (0), 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 22:03:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 586 transitions. [2021-12-15 22:03:05,748 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 586 transitions. Word has length 118 [2021-12-15 22:03:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:05,748 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 586 transitions. [2021-12-15 22:03:05,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 586 transitions. [2021-12-15 22:03:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-15 22:03:05,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:05,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 22:03:05,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:03:05,750 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1550855828, now seen corresponding path program 1 times [2021-12-15 22:03:05,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:05,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087470841] [2021-12-15 22:03:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:05,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 22:03:05,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087470841] [2021-12-15 22:03:05,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087470841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:05,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:05,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776212455] [2021-12-15 22:03:05,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:05,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:05,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:05,820 INFO L87 Difference]: Start difference. First operand 374 states and 586 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 22:03:07,825 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 22:03:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:08,029 INFO L93 Difference]: Finished difference Result 775 states and 1216 transitions. [2021-12-15 22:03:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:08,030 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 118 [2021-12-15 22:03:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:08,031 INFO L225 Difference]: With dead ends: 775 [2021-12-15 22:03:08,031 INFO L226 Difference]: Without dead ends: 422 [2021-12-15 22:03:08,031 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 22:03:08,032 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:08,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 621 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-15 22:03:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 398. [2021-12-15 22:03:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.566750629722922) internal successors, (622), 397 states have internal predecessors, (622), 0 states have call successors, (0), 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 22:03:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 622 transitions. [2021-12-15 22:03:08,047 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 622 transitions. Word has length 118 [2021-12-15 22:03:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:08,048 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 622 transitions. [2021-12-15 22:03:08,048 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 22:03:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 622 transitions. [2021-12-15 22:03:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 22:03:08,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:08,049 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 22:03:08,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:03:08,049 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash 548980907, now seen corresponding path program 1 times [2021-12-15 22:03:08,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:08,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678991773] [2021-12-15 22:03:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:08,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:08,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:08,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678991773] [2021-12-15 22:03:08,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678991773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:08,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:08,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:08,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994747320] [2021-12-15 22:03:08,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:08,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:08,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:08,170 INFO L87 Difference]: Start difference. First operand 398 states and 622 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 22:03:10,183 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 22:03:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:10,453 INFO L93 Difference]: Finished difference Result 832 states and 1300 transitions. [2021-12-15 22:03:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-12-15 22:03:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:10,455 INFO L225 Difference]: With dead ends: 832 [2021-12-15 22:03:10,455 INFO L226 Difference]: Without dead ends: 455 [2021-12-15 22:03:10,456 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 22:03:10,457 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 83 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:10,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 491 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-15 22:03:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 399. [2021-12-15 22:03:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.565326633165829) internal successors, (623), 398 states have internal predecessors, (623), 0 states have call successors, (0), 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 22:03:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 623 transitions. [2021-12-15 22:03:10,464 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 623 transitions. Word has length 119 [2021-12-15 22:03:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:10,464 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 623 transitions. [2021-12-15 22:03:10,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 22:03:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 623 transitions. [2021-12-15 22:03:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 22:03:10,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:10,465 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:10,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 22:03:10,466 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash -564481906, now seen corresponding path program 1 times [2021-12-15 22:03:10,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490428129] [2021-12-15 22:03:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:10,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:10,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490428129] [2021-12-15 22:03:10,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490428129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:10,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766240706] [2021-12-15 22:03:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:10,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:10,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:10,553 INFO L87 Difference]: Start difference. First operand 399 states and 623 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 22:03:12,558 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 22:03:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:12,823 INFO L93 Difference]: Finished difference Result 898 states and 1404 transitions. [2021-12-15 22:03:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 126 [2021-12-15 22:03:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:12,825 INFO L225 Difference]: With dead ends: 898 [2021-12-15 22:03:12,825 INFO L226 Difference]: Without dead ends: 520 [2021-12-15 22:03:12,826 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 22:03:12,826 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 122 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:12,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 385 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-15 22:03:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 442. [2021-12-15 22:03:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5736961451247165) internal successors, (694), 441 states have internal predecessors, (694), 0 states have call successors, (0), 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 22:03:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 694 transitions. [2021-12-15 22:03:12,834 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 694 transitions. Word has length 126 [2021-12-15 22:03:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:12,834 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 694 transitions. [2021-12-15 22:03:12,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 22:03:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 694 transitions. [2021-12-15 22:03:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 22:03:12,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:12,836 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:12,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:03:12,836 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1789588896, now seen corresponding path program 1 times [2021-12-15 22:03:12,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:12,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807066436] [2021-12-15 22:03:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:12,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:03:12,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807066436] [2021-12-15 22:03:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807066436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:12,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945821090] [2021-12-15 22:03:12,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:12,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:12,907 INFO L87 Difference]: Start difference. First operand 442 states and 694 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:03:14,912 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 22:03:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:15,148 INFO L93 Difference]: Finished difference Result 917 states and 1439 transitions. [2021-12-15 22:03:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 126 [2021-12-15 22:03:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:15,150 INFO L225 Difference]: With dead ends: 917 [2021-12-15 22:03:15,150 INFO L226 Difference]: Without dead ends: 496 [2021-12-15 22:03:15,151 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 22:03:15,151 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 102 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:15,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 493 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-15 22:03:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 442. [2021-12-15 22:03:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5714285714285714) internal successors, (693), 441 states have internal predecessors, (693), 0 states have call successors, (0), 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 22:03:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 693 transitions. [2021-12-15 22:03:15,158 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 693 transitions. Word has length 126 [2021-12-15 22:03:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 693 transitions. [2021-12-15 22:03:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:03:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 693 transitions. [2021-12-15 22:03:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 22:03:15,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:15,160 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:15,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:03:15,160 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash -464732702, now seen corresponding path program 1 times [2021-12-15 22:03:15,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036124547] [2021-12-15 22:03:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:15,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:03:15,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036124547] [2021-12-15 22:03:15,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036124547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:15,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:15,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:15,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423961821] [2021-12-15 22:03:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:15,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:15,245 INFO L87 Difference]: Start difference. First operand 442 states and 693 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:03:17,250 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 22:03:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:17,524 INFO L93 Difference]: Finished difference Result 944 states and 1478 transitions. [2021-12-15 22:03:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 126 [2021-12-15 22:03:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:17,526 INFO L225 Difference]: With dead ends: 944 [2021-12-15 22:03:17,526 INFO L226 Difference]: Without dead ends: 523 [2021-12-15 22:03:17,527 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 22:03:17,527 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 149 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:17,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 364 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-15 22:03:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 442. [2021-12-15 22:03:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.5578231292517006) internal successors, (687), 441 states have internal predecessors, (687), 0 states have call successors, (0), 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 22:03:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 687 transitions. [2021-12-15 22:03:17,534 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 687 transitions. Word has length 126 [2021-12-15 22:03:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:17,534 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 687 transitions. [2021-12-15 22:03:17,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 22:03:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 687 transitions. [2021-12-15 22:03:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 22:03:17,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:17,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:17,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:03:17,537 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2086239929, now seen corresponding path program 1 times [2021-12-15 22:03:17,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2195723] [2021-12-15 22:03:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:17,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:17,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:17,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2195723] [2021-12-15 22:03:17,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2195723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:17,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:17,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:17,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589926802] [2021-12-15 22:03:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:17,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:17,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:17,616 INFO L87 Difference]: Start difference. First operand 442 states and 687 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:19,621 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 22:03:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:19,890 INFO L93 Difference]: Finished difference Result 944 states and 1466 transitions. [2021-12-15 22:03:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-15 22:03:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:19,892 INFO L225 Difference]: With dead ends: 944 [2021-12-15 22:03:19,892 INFO L226 Difference]: Without dead ends: 521 [2021-12-15 22:03:19,892 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 22:03:19,893 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 122 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:19,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 364 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-15 22:03:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 444. [2021-12-15 22:03:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.5575620767494356) internal successors, (690), 443 states have internal predecessors, (690), 0 states have call successors, (0), 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 22:03:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 690 transitions. [2021-12-15 22:03:19,899 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 690 transitions. Word has length 127 [2021-12-15 22:03:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:19,900 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 690 transitions. [2021-12-15 22:03:19,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 690 transitions. [2021-12-15 22:03:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 22:03:19,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:19,901 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:19,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:03:19,901 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1989141595, now seen corresponding path program 1 times [2021-12-15 22:03:19,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19976825] [2021-12-15 22:03:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:19,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 22:03:19,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19976825] [2021-12-15 22:03:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19976825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:19,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:19,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 22:03:19,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439199911] [2021-12-15 22:03:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:03:19,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:03:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:19,986 INFO L87 Difference]: Start difference. First operand 444 states and 690 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 22:03:22,949 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 22:03:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:23,230 INFO L93 Difference]: Finished difference Result 877 states and 1368 transitions. [2021-12-15 22:03:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:03:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 134 [2021-12-15 22:03:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:23,232 INFO L225 Difference]: With dead ends: 877 [2021-12-15 22:03:23,232 INFO L226 Difference]: Without dead ends: 454 [2021-12-15 22:03:23,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:03:23,233 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 158 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:23,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 386 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 22:03:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-15 22:03:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 453. [2021-12-15 22:03:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5508849557522124) internal successors, (701), 452 states have internal predecessors, (701), 0 states have call successors, (0), 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 22:03:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 701 transitions. [2021-12-15 22:03:23,240 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 701 transitions. Word has length 134 [2021-12-15 22:03:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:23,241 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 701 transitions. [2021-12-15 22:03:23,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 22:03:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 701 transitions. [2021-12-15 22:03:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 22:03:23,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:23,242 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:23,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 22:03:23,242 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -722275412, now seen corresponding path program 1 times [2021-12-15 22:03:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640469442] [2021-12-15 22:03:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:23,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 22:03:23,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:23,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640469442] [2021-12-15 22:03:23,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640469442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:23,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:23,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:23,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942521674] [2021-12-15 22:03:23,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:23,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:23,319 INFO L87 Difference]: Start difference. First operand 453 states and 701 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 22:03:25,328 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 22:03:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:25,558 INFO L93 Difference]: Finished difference Result 923 states and 1431 transitions. [2021-12-15 22:03:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-15 22:03:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:25,560 INFO L225 Difference]: With dead ends: 923 [2021-12-15 22:03:25,560 INFO L226 Difference]: Without dead ends: 491 [2021-12-15 22:03:25,561 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 22:03:25,561 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 89 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:25,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 513 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-15 22:03:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 453. [2021-12-15 22:03:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5486725663716814) internal successors, (700), 452 states have internal predecessors, (700), 0 states have call successors, (0), 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 22:03:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 700 transitions. [2021-12-15 22:03:25,575 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 700 transitions. Word has length 135 [2021-12-15 22:03:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:25,575 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 700 transitions. [2021-12-15 22:03:25,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 22:03:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 700 transitions. [2021-12-15 22:03:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 22:03:25,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:25,577 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:25,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 22:03:25,577 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash -750775702, now seen corresponding path program 1 times [2021-12-15 22:03:25,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:25,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658682181] [2021-12-15 22:03:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:25,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 22:03:25,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658682181] [2021-12-15 22:03:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658682181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:25,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:25,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:25,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092185692] [2021-12-15 22:03:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:25,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:25,680 INFO L87 Difference]: Start difference. First operand 453 states and 700 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 22:03:27,685 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 22:03:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:27,855 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2021-12-15 22:03:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-15 22:03:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:27,856 INFO L225 Difference]: With dead ends: 897 [2021-12-15 22:03:27,857 INFO L226 Difference]: Without dead ends: 465 [2021-12-15 22:03:27,857 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 22:03:27,858 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 37 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:27,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 607 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:03:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-15 22:03:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 453. [2021-12-15 22:03:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5464601769911503) internal successors, (699), 452 states have internal predecessors, (699), 0 states have call successors, (0), 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 22:03:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 699 transitions. [2021-12-15 22:03:27,864 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 699 transitions. Word has length 135 [2021-12-15 22:03:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:27,864 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 699 transitions. [2021-12-15 22:03:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 22:03:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 699 transitions. [2021-12-15 22:03:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-15 22:03:27,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:27,866 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:27,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 22:03:27,866 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:27,867 INFO L85 PathProgramCache]: Analyzing trace with hash 653565499, now seen corresponding path program 1 times [2021-12-15 22:03:27,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:27,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419548136] [2021-12-15 22:03:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:27,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:03:27,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419548136] [2021-12-15 22:03:27,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419548136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:27,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:27,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:27,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984595457] [2021-12-15 22:03:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:27,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:27,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:27,940 INFO L87 Difference]: Start difference. First operand 453 states and 699 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 22:03:29,959 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 22:03:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:30,249 INFO L93 Difference]: Finished difference Result 1004 states and 1550 transitions. [2021-12-15 22:03:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 139 [2021-12-15 22:03:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:30,251 INFO L225 Difference]: With dead ends: 1004 [2021-12-15 22:03:30,251 INFO L226 Difference]: Without dead ends: 572 [2021-12-15 22:03:30,252 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 22:03:30,252 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 133 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:30,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 374 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-15 22:03:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 483. [2021-12-15 22:03:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.537344398340249) internal successors, (741), 482 states have internal predecessors, (741), 0 states have call successors, (0), 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 22:03:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 741 transitions. [2021-12-15 22:03:30,280 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 741 transitions. Word has length 139 [2021-12-15 22:03:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:30,280 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 741 transitions. [2021-12-15 22:03:30,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 22:03:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 741 transitions. [2021-12-15 22:03:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 22:03:30,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:30,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:30,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 22:03:30,283 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash -181626988, now seen corresponding path program 1 times [2021-12-15 22:03:30,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564476945] [2021-12-15 22:03:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:30,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 22:03:30,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:30,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564476945] [2021-12-15 22:03:30,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564476945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:30,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803616163] [2021-12-15 22:03:30,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:30,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:30,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:30,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:30,356 INFO L87 Difference]: Start difference. First operand 483 states and 741 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 22:03:32,362 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 22:03:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:32,657 INFO L93 Difference]: Finished difference Result 1022 states and 1566 transitions. [2021-12-15 22:03:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 140 [2021-12-15 22:03:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:32,659 INFO L225 Difference]: With dead ends: 1022 [2021-12-15 22:03:32,659 INFO L226 Difference]: Without dead ends: 560 [2021-12-15 22:03:32,660 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 22:03:32,660 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 139 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:32,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 408 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-15 22:03:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 483. [2021-12-15 22:03:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.5228215767634854) internal successors, (734), 482 states have internal predecessors, (734), 0 states have call successors, (0), 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 22:03:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 734 transitions. [2021-12-15 22:03:32,667 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 734 transitions. Word has length 140 [2021-12-15 22:03:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:32,667 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 734 transitions. [2021-12-15 22:03:32,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 22:03:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 734 transitions. [2021-12-15 22:03:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 22:03:32,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:32,669 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:32,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 22:03:32,669 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -938161955, now seen corresponding path program 1 times [2021-12-15 22:03:32,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642434449] [2021-12-15 22:03:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:32,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 22:03:32,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:32,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642434449] [2021-12-15 22:03:32,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642434449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:32,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:32,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:32,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601783150] [2021-12-15 22:03:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:32,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:32,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:32,766 INFO L87 Difference]: Start difference. First operand 483 states and 734 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:34,773 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 []