./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.09.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 8da39e66c08628aa90e95213e006a92eb0d5a63143d71cc4cdb2dcfa95ff1896 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:59:35,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:59:35,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:59:35,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:59:35,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:59:35,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:59:35,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:59:35,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:59:35,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:59:35,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:59:35,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:59:35,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:59:35,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:59:35,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:59:35,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:59:35,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:59:35,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:59:35,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:59:35,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:59:35,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:59:35,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:59:35,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:59:35,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:59:35,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:59:35,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:59:35,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:59:35,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:59:35,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:59:35,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:59:35,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:59:35,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:59:35,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:59:35,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:59:35,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:59:35,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:59:35,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:59:35,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:59:35,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:59:35,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:59:35,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:59:35,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:59:35,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:59:35,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:59:35,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:59:35,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:59:35,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:59:35,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:59:35,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:59:35,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:59:35,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:59:35,985 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:59:35,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:59:35,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:59:35,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:59:35,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:59:35,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:59:35,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:59:35,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:59:35,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:59:35,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:59:35,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:59:35,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:59:35,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:59:35,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:59:35,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8da39e66c08628aa90e95213e006a92eb0d5a63143d71cc4cdb2dcfa95ff1896 [2021-12-15 08:59:36,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:59:36,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:59:36,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:59:36,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:59:36,227 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:59:36,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-2.c [2021-12-15 08:59:36,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5169f6384/fdc44ce1f03d45a8b8375dff758f3a20/FLAG344fc1eac [2021-12-15 08:59:36,766 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:59:36,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-2.c [2021-12-15 08:59:36,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5169f6384/fdc44ce1f03d45a8b8375dff758f3a20/FLAG344fc1eac [2021-12-15 08:59:37,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5169f6384/fdc44ce1f03d45a8b8375dff758f3a20 [2021-12-15 08:59:37,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:59:37,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:59:37,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:59:37,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:59:37,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:59:37,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff56914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37, skipping insertion in model container [2021-12-15 08:59:37,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:59:37,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:59:37,451 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.09.i.cil-2.c[74369,74382] [2021-12-15 08:59:37,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:59:37,473 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:59:37,577 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.09.i.cil-2.c[74369,74382] [2021-12-15 08:59:37,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:59:37,594 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:59:37,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37 WrapperNode [2021-12-15 08:59:37,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:59:37,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:59:37,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:59:37,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:59:37,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,672 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-12-15 08:59:37,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:59:37,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:59:37,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:59:37,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:59:37,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:59:37,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:59:37,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:59:37,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:59:37,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (1/1) ... [2021-12-15 08:59:37,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:59:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:59:37,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:59:37,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:59:37,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:59:37,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 08:59:37,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:59:37,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:59:37,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 08:59:37,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:59:37,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:59:37,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:59:37,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:59:37,991 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:59:37,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:59:38,010 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 08:59:40,029 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 08:59:40,029 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 08:59:40,029 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:59:40,037 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:59:40,037 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:59:40,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:59:40 BoogieIcfgContainer [2021-12-15 08:59:40,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:59:40,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:59:40,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:59:40,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:59:40,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:59:37" (1/3) ... [2021-12-15 08:59:40,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e63b874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:59:40, skipping insertion in model container [2021-12-15 08:59:40,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:37" (2/3) ... [2021-12-15 08:59:40,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e63b874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:59:40, skipping insertion in model container [2021-12-15 08:59:40,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:59:40" (3/3) ... [2021-12-15 08:59:40,045 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-2.c [2021-12-15 08:59:40,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:59:40,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:59:40,095 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:59:40,100 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:59:40,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:59:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 08:59:40,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:40,124 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] [2021-12-15 08:59:40,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-12-15 08:59:40,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:40,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909008814] [2021-12-15 08:59:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:40,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:40,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909008814] [2021-12-15 08:59:40,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909008814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:40,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:40,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:40,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049993912] [2021-12-15 08:59:40,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:40,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:40,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:40,580 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:41,958 INFO L93 Difference]: Finished difference Result 421 states and 717 transitions. [2021-12-15 08:59:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 08:59:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:41,967 INFO L225 Difference]: With dead ends: 421 [2021-12-15 08:59:41,967 INFO L226 Difference]: Without dead ends: 256 [2021-12-15 08:59:41,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:41,972 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 169 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:41,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 439 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 08:59:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-15 08:59:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2021-12-15 08:59:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5853658536585367) internal successors, (260), 164 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 08:59:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 260 transitions. [2021-12-15 08:59:42,008 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 260 transitions. Word has length 37 [2021-12-15 08:59:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:42,008 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 260 transitions. [2021-12-15 08:59:42,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 260 transitions. [2021-12-15 08:59:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 08:59:42,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:42,010 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] [2021-12-15 08:59:42,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:59:42,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:42,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1559591930, now seen corresponding path program 1 times [2021-12-15 08:59:42,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968933939] [2021-12-15 08:59:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:42,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:42,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:42,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968933939] [2021-12-15 08:59:42,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968933939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:42,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:42,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:42,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048155361] [2021-12-15 08:59:42,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:42,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:42,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:42,140 INFO L87 Difference]: Start difference. First operand 165 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:44,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:44,497 INFO L93 Difference]: Finished difference Result 439 states and 692 transitions. [2021-12-15 08:59:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-15 08:59:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:44,499 INFO L225 Difference]: With dead ends: 439 [2021-12-15 08:59:44,499 INFO L226 Difference]: Without dead ends: 284 [2021-12-15 08:59:44,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:44,501 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 134 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:44,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-15 08:59:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2021-12-15 08:59:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.616580310880829) internal successors, (312), 193 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 312 transitions. [2021-12-15 08:59:44,509 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 312 transitions. Word has length 38 [2021-12-15 08:59:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:44,509 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 312 transitions. [2021-12-15 08:59:44,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 312 transitions. [2021-12-15 08:59:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 08:59:44,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:44,511 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] [2021-12-15 08:59:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:59:44,511 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1692172757, now seen corresponding path program 1 times [2021-12-15 08:59:44,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060684109] [2021-12-15 08:59:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:44,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:44,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:44,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060684109] [2021-12-15 08:59:44,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060684109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:44,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:44,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:44,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128767630] [2021-12-15 08:59:44,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:44,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:44,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:44,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:44,626 INFO L87 Difference]: Start difference. First operand 194 states and 312 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:46,840 INFO L93 Difference]: Finished difference Result 406 states and 651 transitions. [2021-12-15 08:59:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 08:59:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:46,842 INFO L225 Difference]: With dead ends: 406 [2021-12-15 08:59:46,842 INFO L226 Difference]: Without dead ends: 222 [2021-12-15 08:59:46,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:46,844 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 22 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:46,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 469 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-15 08:59:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2021-12-15 08:59:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6225490196078431) internal successors, (331), 204 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 331 transitions. [2021-12-15 08:59:46,851 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 331 transitions. Word has length 43 [2021-12-15 08:59:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 331 transitions. [2021-12-15 08:59:46,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 331 transitions. [2021-12-15 08:59:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 08:59:46,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:46,853 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] [2021-12-15 08:59:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:59:46,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2118558335, now seen corresponding path program 1 times [2021-12-15 08:59:46,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:46,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102747031] [2021-12-15 08:59:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:46,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:46,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102747031] [2021-12-15 08:59:46,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102747031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:46,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:46,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:46,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459818770] [2021-12-15 08:59:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:46,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:46,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:46,965 INFO L87 Difference]: Start difference. First operand 205 states and 331 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:48,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:49,166 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2021-12-15 08:59:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-15 08:59:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:49,168 INFO L225 Difference]: With dead ends: 406 [2021-12-15 08:59:49,168 INFO L226 Difference]: Without dead ends: 222 [2021-12-15 08:59:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:49,169 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:49,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-15 08:59:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2021-12-15 08:59:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6176470588235294) internal successors, (330), 204 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 330 transitions. [2021-12-15 08:59:49,175 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 330 transitions. Word has length 56 [2021-12-15 08:59:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:49,175 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 330 transitions. [2021-12-15 08:59:49,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 330 transitions. [2021-12-15 08:59:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 08:59:49,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:49,176 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] [2021-12-15 08:59:49,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:59:49,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1352412976, now seen corresponding path program 1 times [2021-12-15 08:59:49,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:49,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912747588] [2021-12-15 08:59:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:49,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:49,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:49,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912747588] [2021-12-15 08:59:49,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912747588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:49,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:49,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:49,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381670512] [2021-12-15 08:59:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:49,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:49,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:49,287 INFO L87 Difference]: Start difference. First operand 205 states and 330 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 08:59:51,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:51,477 INFO L93 Difference]: Finished difference Result 405 states and 648 transitions. [2021-12-15 08:59:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:51,478 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 08:59:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:51,479 INFO L225 Difference]: With dead ends: 405 [2021-12-15 08:59:51,480 INFO L226 Difference]: Without dead ends: 221 [2021-12-15 08:59:51,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:51,481 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-15 08:59:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2021-12-15 08:59:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6127450980392157) internal successors, (329), 204 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 329 transitions. [2021-12-15 08:59:51,486 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 329 transitions. Word has length 57 [2021-12-15 08:59:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:51,486 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 329 transitions. [2021-12-15 08:59:51,486 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 08:59:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 329 transitions. [2021-12-15 08:59:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 08:59:51,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:51,487 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] [2021-12-15 08:59:51,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:59:51,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1938932324, now seen corresponding path program 1 times [2021-12-15 08:59:51,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214443549] [2021-12-15 08:59:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:51,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:51,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214443549] [2021-12-15 08:59:51,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214443549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:51,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:51,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:51,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943502076] [2021-12-15 08:59:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:51,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:51,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:51,567 INFO L87 Difference]: Start difference. First operand 205 states and 329 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 08:59:52,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:52,885 INFO L93 Difference]: Finished difference Result 405 states and 647 transitions. [2021-12-15 08:59:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:52,886 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 08:59:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:52,887 INFO L225 Difference]: With dead ends: 405 [2021-12-15 08:59:52,887 INFO L226 Difference]: Without dead ends: 221 [2021-12-15 08:59:52,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:52,888 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:52,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 08:59:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-15 08:59:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2021-12-15 08:59:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.607843137254902) internal successors, (328), 204 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 328 transitions. [2021-12-15 08:59:52,892 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 328 transitions. Word has length 57 [2021-12-15 08:59:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:52,892 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 328 transitions. [2021-12-15 08:59:52,892 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 08:59:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 328 transitions. [2021-12-15 08:59:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 08:59:52,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:52,893 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] [2021-12-15 08:59:52,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 08:59:52,893 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1071007483, now seen corresponding path program 1 times [2021-12-15 08:59:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333792453] [2021-12-15 08:59:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:52,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:52,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333792453] [2021-12-15 08:59:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333792453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:52,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:52,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:52,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593754364] [2021-12-15 08:59:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:52,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:52,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:52,977 INFO L87 Difference]: Start difference. First operand 205 states and 328 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 08:59:54,678 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 08:59:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:54,835 INFO L93 Difference]: Finished difference Result 404 states and 645 transitions. [2021-12-15 08:59:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:54,836 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 08:59:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:54,837 INFO L225 Difference]: With dead ends: 404 [2021-12-15 08:59:54,837 INFO L226 Difference]: Without dead ends: 220 [2021-12-15 08:59:54,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:54,838 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 19 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:54,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 475 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 08:59:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-15 08:59:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 205. [2021-12-15 08:59:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6029411764705883) internal successors, (327), 204 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 327 transitions. [2021-12-15 08:59:54,842 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 327 transitions. Word has length 57 [2021-12-15 08:59:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:54,842 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 327 transitions. [2021-12-15 08:59:54,842 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 08:59:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 327 transitions. [2021-12-15 08:59:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 08:59:54,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:54,843 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] [2021-12-15 08:59:54,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:59:54,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1806352315, now seen corresponding path program 1 times [2021-12-15 08:59:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890616071] [2021-12-15 08:59:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:54,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:54,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:54,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890616071] [2021-12-15 08:59:54,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890616071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:54,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:54,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:54,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981874588] [2021-12-15 08:59:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:54,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:54,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:54,921 INFO L87 Difference]: Start difference. First operand 205 states and 327 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 08:59:56,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:57,208 INFO L93 Difference]: Finished difference Result 479 states and 758 transitions. [2021-12-15 08:59:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:57,208 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 08:59:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:57,209 INFO L225 Difference]: With dead ends: 479 [2021-12-15 08:59:57,209 INFO L226 Difference]: Without dead ends: 295 [2021-12-15 08:59:57,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:57,210 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 145 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:57,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-15 08:59:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 205. [2021-12-15 08:59:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.588235294117647) internal successors, (324), 204 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 324 transitions. [2021-12-15 08:59:57,214 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 324 transitions. Word has length 57 [2021-12-15 08:59:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:57,214 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 324 transitions. [2021-12-15 08:59:57,214 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 08:59:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 324 transitions. [2021-12-15 08:59:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 08:59:57,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:57,215 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] [2021-12-15 08:59:57,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:59:57,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:57,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 95499112, now seen corresponding path program 1 times [2021-12-15 08:59:57,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:57,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486090902] [2021-12-15 08:59:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:57,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:57,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486090902] [2021-12-15 08:59:57,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486090902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:57,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:57,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:57,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941423704] [2021-12-15 08:59:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:57,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:57,302 INFO L87 Difference]: Start difference. First operand 205 states and 324 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 08:59:59,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:59,384 INFO L93 Difference]: Finished difference Result 479 states and 753 transitions. [2021-12-15 08:59:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:59,385 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 08:59:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:59,386 INFO L225 Difference]: With dead ends: 479 [2021-12-15 08:59:59,386 INFO L226 Difference]: Without dead ends: 295 [2021-12-15 08:59:59,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:59,387 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 148 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:59,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 08:59:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-15 08:59:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 205. [2021-12-15 08:59:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5735294117647058) internal successors, (321), 204 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 321 transitions. [2021-12-15 08:59:59,391 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 321 transitions. Word has length 58 [2021-12-15 08:59:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:59,391 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 321 transitions. [2021-12-15 08:59:59,391 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 08:59:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 321 transitions. [2021-12-15 08:59:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 08:59:59,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:59,392 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] [2021-12-15 08:59:59,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 08:59:59,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1130123415, now seen corresponding path program 1 times [2021-12-15 08:59:59,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224877862] [2021-12-15 08:59:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:59,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:59,455 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 08:59:59,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224877862] [2021-12-15 08:59:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224877862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:59,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:59,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:59,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712673262] [2021-12-15 08:59:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:59,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:59,457 INFO L87 Difference]: Start difference. First operand 205 states and 321 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 09:00:01,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:01,682 INFO L93 Difference]: Finished difference Result 479 states and 748 transitions. [2021-12-15 09:00:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:01,682 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 09:00:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:01,683 INFO L225 Difference]: With dead ends: 479 [2021-12-15 09:00:01,683 INFO L226 Difference]: Without dead ends: 295 [2021-12-15 09:00:01,684 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 09:00:01,684 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 146 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:01,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-15 09:00:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 205. [2021-12-15 09:00:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5588235294117647) internal successors, (318), 204 states have internal predecessors, (318), 0 states have call successors, (0), 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 09:00:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 318 transitions. [2021-12-15 09:00:01,691 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 318 transitions. Word has length 59 [2021-12-15 09:00:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:01,692 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 318 transitions. [2021-12-15 09:00:01,693 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 09:00:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 318 transitions. [2021-12-15 09:00:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 09:00:01,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:01,693 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] [2021-12-15 09:00:01,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:00:01,694 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash -383483891, now seen corresponding path program 1 times [2021-12-15 09:00:01,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:01,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144217006] [2021-12-15 09:00:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:01,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:01,774 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 09:00:01,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:01,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144217006] [2021-12-15 09:00:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144217006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:01,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:01,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419643790] [2021-12-15 09:00:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:01,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:01,778 INFO L87 Difference]: Start difference. First operand 205 states and 318 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 09:00:03,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:03,823 INFO L93 Difference]: Finished difference Result 392 states and 614 transitions. [2021-12-15 09:00:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:03,824 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 09:00:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:03,825 INFO L225 Difference]: With dead ends: 392 [2021-12-15 09:00:03,825 INFO L226 Difference]: Without dead ends: 208 [2021-12-15 09:00:03,825 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 09:00:03,825 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:03,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:00:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-15 09:00:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-12-15 09:00:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.553921568627451) internal successors, (317), 204 states have internal predecessors, (317), 0 states have call successors, (0), 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 09:00:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 317 transitions. [2021-12-15 09:00:03,829 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 317 transitions. Word has length 60 [2021-12-15 09:00:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 317 transitions. [2021-12-15 09:00:03,829 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 09:00:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 317 transitions. [2021-12-15 09:00:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 09:00:03,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:03,830 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] [2021-12-15 09:00:03,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:00:03,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:03,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:03,830 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-12-15 09:00:03,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:03,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475311507] [2021-12-15 09:00:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:03,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:03,891 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 09:00:03,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:03,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475311507] [2021-12-15 09:00:03,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475311507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:03,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126921768] [2021-12-15 09:00:03,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:03,893 INFO L87 Difference]: Start difference. First operand 205 states and 317 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 09:00:05,898 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 09:00:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:06,090 INFO L93 Difference]: Finished difference Result 432 states and 672 transitions. [2021-12-15 09:00:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:06,090 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 09:00:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:06,091 INFO L225 Difference]: With dead ends: 432 [2021-12-15 09:00:06,092 INFO L226 Difference]: Without dead ends: 248 [2021-12-15 09:00:06,092 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 09:00:06,092 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 31 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:06,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 491 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-15 09:00:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 227. [2021-12-15 09:00:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5575221238938053) internal successors, (352), 226 states have internal predecessors, (352), 0 states have call successors, (0), 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 09:00:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 352 transitions. [2021-12-15 09:00:06,097 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 352 transitions. Word has length 60 [2021-12-15 09:00:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:06,097 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 352 transitions. [2021-12-15 09:00:06,097 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 09:00:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 352 transitions. [2021-12-15 09:00:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 09:00:06,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:06,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:06,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:00:06,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1313407199, now seen corresponding path program 1 times [2021-12-15 09:00:06,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:06,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081405238] [2021-12-15 09:00:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:06,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:06,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:06,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081405238] [2021-12-15 09:00:06,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081405238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:06,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:06,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:06,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473023065] [2021-12-15 09:00:06,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:06,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:06,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:06,171 INFO L87 Difference]: Start difference. First operand 227 states and 352 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 09:00:07,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:07,659 INFO L93 Difference]: Finished difference Result 452 states and 704 transitions. [2021-12-15 09:00:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-15 09:00:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:07,660 INFO L225 Difference]: With dead ends: 452 [2021-12-15 09:00:07,660 INFO L226 Difference]: Without dead ends: 246 [2021-12-15 09:00:07,661 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 09:00:07,661 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 36 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:07,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 495 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:00:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-15 09:00:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2021-12-15 09:00:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5530973451327434) internal successors, (351), 226 states have internal predecessors, (351), 0 states have call successors, (0), 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 09:00:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 351 transitions. [2021-12-15 09:00:07,665 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 351 transitions. Word has length 73 [2021-12-15 09:00:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:07,665 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 351 transitions. [2021-12-15 09:00:07,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 09:00:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 351 transitions. [2021-12-15 09:00:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 09:00:07,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:07,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:07,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:00:07,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash -542294416, now seen corresponding path program 1 times [2021-12-15 09:00:07,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:07,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600879055] [2021-12-15 09:00:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:07,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:07,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:07,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600879055] [2021-12-15 09:00:07,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600879055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:07,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:07,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:07,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888491104] [2021-12-15 09:00:07,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:07,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:07,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:07,753 INFO L87 Difference]: Start difference. First operand 227 states and 351 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:09,758 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 09:00:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:10,041 INFO L93 Difference]: Finished difference Result 522 states and 809 transitions. [2021-12-15 09:00:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 09:00:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:10,043 INFO L225 Difference]: With dead ends: 522 [2021-12-15 09:00:10,043 INFO L226 Difference]: Without dead ends: 316 [2021-12-15 09:00:10,043 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 09:00:10,044 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 149 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:10,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-15 09:00:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 227. [2021-12-15 09:00:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5398230088495575) internal successors, (348), 226 states have internal predecessors, (348), 0 states have call successors, (0), 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 09:00:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 348 transitions. [2021-12-15 09:00:10,049 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 348 transitions. Word has length 74 [2021-12-15 09:00:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:10,049 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 348 transitions. [2021-12-15 09:00:10,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 348 transitions. [2021-12-15 09:00:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 09:00:10,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:10,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:10,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:00:10,050 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1545916412, now seen corresponding path program 1 times [2021-12-15 09:00:10,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:10,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332148149] [2021-12-15 09:00:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:10,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:10,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:10,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332148149] [2021-12-15 09:00:10,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332148149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:10,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:10,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:10,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620774968] [2021-12-15 09:00:10,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:10,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:10,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:10,138 INFO L87 Difference]: Start difference. First operand 227 states and 348 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:12,151 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 09:00:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:12,363 INFO L93 Difference]: Finished difference Result 451 states and 695 transitions. [2021-12-15 09:00:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 09:00:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:12,365 INFO L225 Difference]: With dead ends: 451 [2021-12-15 09:00:12,365 INFO L226 Difference]: Without dead ends: 245 [2021-12-15 09:00:12,365 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 09:00:12,366 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 38 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:12,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 497 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-15 09:00:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 227. [2021-12-15 09:00:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5353982300884956) internal successors, (347), 226 states have internal predecessors, (347), 0 states have call successors, (0), 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 09:00:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 347 transitions. [2021-12-15 09:00:12,370 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 347 transitions. Word has length 74 [2021-12-15 09:00:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:12,370 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 347 transitions. [2021-12-15 09:00:12,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 347 transitions. [2021-12-15 09:00:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 09:00:12,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:12,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:12,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:00:12,371 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1881126043, now seen corresponding path program 1 times [2021-12-15 09:00:12,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:12,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717676837] [2021-12-15 09:00:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:12,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:12,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717676837] [2021-12-15 09:00:12,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717676837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:12,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:12,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462318983] [2021-12-15 09:00:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:12,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:12,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:12,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:12,448 INFO L87 Difference]: Start difference. First operand 227 states and 347 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:13,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:14,136 INFO L93 Difference]: Finished difference Result 450 states and 692 transitions. [2021-12-15 09:00:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-15 09:00:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:14,138 INFO L225 Difference]: With dead ends: 450 [2021-12-15 09:00:14,138 INFO L226 Difference]: Without dead ends: 244 [2021-12-15 09:00:14,139 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 09:00:14,139 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 31 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:14,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:00:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-15 09:00:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-12-15 09:00:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5309734513274336) internal successors, (346), 226 states have internal predecessors, (346), 0 states have call successors, (0), 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 09:00:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 346 transitions. [2021-12-15 09:00:14,143 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 346 transitions. Word has length 74 [2021-12-15 09:00:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:14,143 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 346 transitions. [2021-12-15 09:00:14,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 09:00:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 346 transitions. [2021-12-15 09:00:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 09:00:14,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:14,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:14,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:00:14,145 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash 437300845, now seen corresponding path program 1 times [2021-12-15 09:00:14,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:14,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155112101] [2021-12-15 09:00:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:14,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:14,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155112101] [2021-12-15 09:00:14,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155112101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:14,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:14,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:14,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954741090] [2021-12-15 09:00:14,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:14,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:14,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:14,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:14,226 INFO L87 Difference]: Start difference. First operand 227 states and 346 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 09:00:16,239 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 09:00:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:16,528 INFO L93 Difference]: Finished difference Result 522 states and 799 transitions. [2021-12-15 09:00:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:16,528 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 77 [2021-12-15 09:00:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:16,529 INFO L225 Difference]: With dead ends: 522 [2021-12-15 09:00:16,530 INFO L226 Difference]: Without dead ends: 316 [2021-12-15 09:00:16,530 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 09:00:16,532 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:16,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-15 09:00:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 227. [2021-12-15 09:00:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5176991150442478) internal successors, (343), 226 states have internal predecessors, (343), 0 states have call successors, (0), 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 09:00:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 343 transitions. [2021-12-15 09:00:16,537 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 343 transitions. Word has length 77 [2021-12-15 09:00:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:16,537 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 343 transitions. [2021-12-15 09:00:16,537 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 09:00:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 343 transitions. [2021-12-15 09:00:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 09:00:16,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:16,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:16,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:00:16,538 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2009733770, now seen corresponding path program 1 times [2021-12-15 09:00:16,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:16,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82288972] [2021-12-15 09:00:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:16,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:16,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:16,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82288972] [2021-12-15 09:00:16,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82288972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:16,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:16,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:16,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156593258] [2021-12-15 09:00:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:16,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:16,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:16,625 INFO L87 Difference]: Start difference. First operand 227 states and 343 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:18,632 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 09:00:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:18,910 INFO L93 Difference]: Finished difference Result 531 states and 805 transitions. [2021-12-15 09:00:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 82 [2021-12-15 09:00:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:18,912 INFO L225 Difference]: With dead ends: 531 [2021-12-15 09:00:18,912 INFO L226 Difference]: Without dead ends: 325 [2021-12-15 09:00:18,913 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 09:00:18,913 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 79 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 477 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-15 09:00:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2021-12-15 09:00:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5355805243445693) internal successors, (410), 267 states have internal predecessors, (410), 0 states have call successors, (0), 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 09:00:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 410 transitions. [2021-12-15 09:00:18,929 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 410 transitions. Word has length 82 [2021-12-15 09:00:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:18,930 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 410 transitions. [2021-12-15 09:00:18,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 410 transitions. [2021-12-15 09:00:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 09:00:18,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:18,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:18,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:00:18,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 164366604, now seen corresponding path program 1 times [2021-12-15 09:00:18,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059249766] [2021-12-15 09:00:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:18,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:19,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059249766] [2021-12-15 09:00:19,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059249766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:19,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:19,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:19,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923934639] [2021-12-15 09:00:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:19,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:19,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:19,005 INFO L87 Difference]: Start difference. First operand 268 states and 410 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:21,010 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 09:00:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:21,294 INFO L93 Difference]: Finished difference Result 634 states and 974 transitions. [2021-12-15 09:00:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 82 [2021-12-15 09:00:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:21,296 INFO L225 Difference]: With dead ends: 634 [2021-12-15 09:00:21,296 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 09:00:21,297 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 09:00:21,297 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 119 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:21,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 334 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 09:00:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 267. [2021-12-15 09:00:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.537593984962406) internal successors, (409), 266 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 409 transitions. [2021-12-15 09:00:21,302 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 409 transitions. Word has length 82 [2021-12-15 09:00:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:21,302 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 409 transitions. [2021-12-15 09:00:21,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 409 transitions. [2021-12-15 09:00:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 09:00:21,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:21,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:21,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:00:21,304 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2129799745, now seen corresponding path program 1 times [2021-12-15 09:00:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035259049] [2021-12-15 09:00:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:21,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035259049] [2021-12-15 09:00:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035259049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:21,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549723999] [2021-12-15 09:00:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:21,411 INFO L87 Difference]: Start difference. First operand 267 states and 409 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 09:00:23,416 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 09:00:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:23,688 INFO L93 Difference]: Finished difference Result 602 states and 925 transitions. [2021-12-15 09:00:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 83 [2021-12-15 09:00:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:23,689 INFO L225 Difference]: With dead ends: 602 [2021-12-15 09:00:23,689 INFO L226 Difference]: Without dead ends: 356 [2021-12-15 09:00:23,689 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 09:00:23,690 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 118 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:23,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 346 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-15 09:00:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 278. [2021-12-15 09:00:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.552346570397112) internal successors, (430), 277 states have internal predecessors, (430), 0 states have call successors, (0), 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 09:00:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 430 transitions. [2021-12-15 09:00:23,695 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 430 transitions. Word has length 83 [2021-12-15 09:00:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 430 transitions. [2021-12-15 09:00:23,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 09:00:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 430 transitions. [2021-12-15 09:00:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 09:00:23,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:23,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 09:00:23,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1225033571, now seen corresponding path program 1 times [2021-12-15 09:00:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:23,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63355737] [2021-12-15 09:00:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:23,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:23,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63355737] [2021-12-15 09:00:23,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63355737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:23,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:23,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:23,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168092592] [2021-12-15 09:00:23,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:23,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:23,767 INFO L87 Difference]: Start difference. First operand 278 states and 430 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 09:00:25,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:25,993 INFO L93 Difference]: Finished difference Result 653 states and 1011 transitions. [2021-12-15 09:00:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:25,994 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 104 [2021-12-15 09:00:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:25,995 INFO L225 Difference]: With dead ends: 653 [2021-12-15 09:00:25,995 INFO L226 Difference]: Without dead ends: 396 [2021-12-15 09:00:25,996 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 09:00:25,996 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 131 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:25,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 346 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-15 09:00:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 304. [2021-12-15 09:00:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.5478547854785478) internal successors, (469), 303 states have internal predecessors, (469), 0 states have call successors, (0), 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 09:00:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 469 transitions. [2021-12-15 09:00:26,001 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 469 transitions. Word has length 104 [2021-12-15 09:00:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:26,001 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 469 transitions. [2021-12-15 09:00:26,002 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 09:00:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 469 transitions. [2021-12-15 09:00:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 09:00:26,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:26,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:26,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:00:26,003 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1320690045, now seen corresponding path program 1 times [2021-12-15 09:00:26,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:26,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444039131] [2021-12-15 09:00:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:26,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444039131] [2021-12-15 09:00:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444039131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311943041] [2021-12-15 09:00:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:26,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:26,076 INFO L87 Difference]: Start difference. First operand 304 states and 469 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:27,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:28,025 INFO L93 Difference]: Finished difference Result 665 states and 1023 transitions. [2021-12-15 09:00:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-15 09:00:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:28,027 INFO L225 Difference]: With dead ends: 665 [2021-12-15 09:00:28,027 INFO L226 Difference]: Without dead ends: 382 [2021-12-15 09:00:28,027 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 09:00:28,028 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 130 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:28,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 382 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:00:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-15 09:00:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 304. [2021-12-15 09:00:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.537953795379538) internal successors, (466), 303 states have internal predecessors, (466), 0 states have call successors, (0), 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 09:00:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 466 transitions. [2021-12-15 09:00:28,033 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 466 transitions. Word has length 105 [2021-12-15 09:00:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:28,033 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 466 transitions. [2021-12-15 09:00:28,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 466 transitions. [2021-12-15 09:00:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 09:00:28,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:28,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:28,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:00:28,034 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 597821958, now seen corresponding path program 1 times [2021-12-15 09:00:28,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477342940] [2021-12-15 09:00:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:28,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 09:00:28,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:28,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477342940] [2021-12-15 09:00:28,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477342940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:28,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:28,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:28,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684168028] [2021-12-15 09:00:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:28,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:28,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:28,123 INFO L87 Difference]: Start difference. First operand 304 states and 466 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:28,648 INFO L93 Difference]: Finished difference Result 741 states and 1141 transitions. [2021-12-15 09:00:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-15 09:00:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:28,650 INFO L225 Difference]: With dead ends: 741 [2021-12-15 09:00:28,651 INFO L226 Difference]: Without dead ends: 458 [2021-12-15 09:00:28,651 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 09:00:28,651 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 123 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:28,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 378 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:00:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-15 09:00:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 368. [2021-12-15 09:00:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5367847411444142) internal successors, (564), 367 states have internal predecessors, (564), 0 states have call successors, (0), 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 09:00:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 564 transitions. [2021-12-15 09:00:28,657 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 564 transitions. Word has length 105 [2021-12-15 09:00:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:28,657 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 564 transitions. [2021-12-15 09:00:28,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 564 transitions. [2021-12-15 09:00:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 09:00:28,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:28,658 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] [2021-12-15 09:00:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:00:28,658 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2088424738, now seen corresponding path program 1 times [2021-12-15 09:00:28,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:28,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803820354] [2021-12-15 09:00:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:28,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:28,728 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 09:00:28,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803820354] [2021-12-15 09:00:28,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803820354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:28,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:28,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:28,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466323349] [2021-12-15 09:00:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:28,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:28,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:28,730 INFO L87 Difference]: Start difference. First operand 368 states and 564 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:30,743 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 09:00:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:30,975 INFO L93 Difference]: Finished difference Result 802 states and 1228 transitions. [2021-12-15 09:00:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 09:00:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:30,977 INFO L225 Difference]: With dead ends: 802 [2021-12-15 09:00:30,977 INFO L226 Difference]: Without dead ends: 455 [2021-12-15 09:00:30,978 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 09:00:30,978 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 69 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:30,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 485 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-15 09:00:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 407. [2021-12-15 09:00:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5369458128078817) internal successors, (624), 406 states have internal predecessors, (624), 0 states have call successors, (0), 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 09:00:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 624 transitions. [2021-12-15 09:00:30,985 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 624 transitions. Word has length 116 [2021-12-15 09:00:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:30,985 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 624 transitions. [2021-12-15 09:00:30,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 624 transitions. [2021-12-15 09:00:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 09:00:30,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:30,986 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] [2021-12-15 09:00:30,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 09:00:30,986 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 295500000, now seen corresponding path program 1 times [2021-12-15 09:00:30,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:30,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866120669] [2021-12-15 09:00:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:30,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:31,053 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 09:00:31,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:31,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866120669] [2021-12-15 09:00:31,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866120669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:31,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:31,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:31,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392099690] [2021-12-15 09:00:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:31,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:31,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:31,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:31,055 INFO L87 Difference]: Start difference. First operand 407 states and 624 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:33,071 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 09:00:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:33,343 INFO L93 Difference]: Finished difference Result 911 states and 1396 transitions. [2021-12-15 09:00:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 09:00:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:33,345 INFO L225 Difference]: With dead ends: 911 [2021-12-15 09:00:33,345 INFO L226 Difference]: Without dead ends: 525 [2021-12-15 09:00:33,346 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 09:00:33,346 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 119 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:33,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 366 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-15 09:00:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 405. [2021-12-15 09:00:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.5371287128712872) internal successors, (621), 404 states have internal predecessors, (621), 0 states have call successors, (0), 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 09:00:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 621 transitions. [2021-12-15 09:00:33,360 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 621 transitions. Word has length 116 [2021-12-15 09:00:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:33,360 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 621 transitions. [2021-12-15 09:00:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 621 transitions. [2021-12-15 09:00:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-15 09:00:33,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:33,362 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] [2021-12-15 09:00:33,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 09:00:33,362 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1196946803, now seen corresponding path program 1 times [2021-12-15 09:00:33,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:33,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716680262] [2021-12-15 09:00:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:33,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:33,435 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 09:00:33,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:33,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716680262] [2021-12-15 09:00:33,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716680262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:33,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:33,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:33,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991979716] [2021-12-15 09:00:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:33,437 INFO L87 Difference]: Start difference. First operand 405 states and 621 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:35,442 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 09:00:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:35,697 INFO L93 Difference]: Finished difference Result 867 states and 1327 transitions. [2021-12-15 09:00:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-15 09:00:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:35,699 INFO L225 Difference]: With dead ends: 867 [2021-12-15 09:00:35,699 INFO L226 Difference]: Without dead ends: 483 [2021-12-15 09:00:35,699 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 09:00:35,700 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 118 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:35,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 382 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-15 09:00:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 405. [2021-12-15 09:00:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.5321782178217822) internal successors, (619), 404 states have internal predecessors, (619), 0 states have call successors, (0), 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 09:00:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 619 transitions. [2021-12-15 09:00:35,706 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 619 transitions. Word has length 117 [2021-12-15 09:00:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:35,706 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 619 transitions. [2021-12-15 09:00:35,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 619 transitions. [2021-12-15 09:00:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-15 09:00:35,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:35,707 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:35,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 09:00:35,707 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -47873882, now seen corresponding path program 1 times [2021-12-15 09:00:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483871405] [2021-12-15 09:00:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:35,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 09:00:35,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:35,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483871405] [2021-12-15 09:00:35,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483871405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:35,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:35,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:35,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508846326] [2021-12-15 09:00:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:35,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:35,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:35,790 INFO L87 Difference]: Start difference. First operand 405 states and 619 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:37,795 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 09:00:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:38,077 INFO L93 Difference]: Finished difference Result 905 states and 1382 transitions. [2021-12-15 09:00:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-15 09:00:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:38,079 INFO L225 Difference]: With dead ends: 905 [2021-12-15 09:00:38,079 INFO L226 Difference]: Without dead ends: 521 [2021-12-15 09:00:38,079 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 09:00:38,080 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 139 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 336 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-15 09:00:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-12-15 09:00:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5119047619047619) internal successors, (635), 420 states have internal predecessors, (635), 0 states have call successors, (0), 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 09:00:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 635 transitions. [2021-12-15 09:00:38,086 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 635 transitions. Word has length 118 [2021-12-15 09:00:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:38,087 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 635 transitions. [2021-12-15 09:00:38,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 635 transitions. [2021-12-15 09:00:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-15 09:00:38,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:38,090 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] [2021-12-15 09:00:38,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 09:00:38,091 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 872125617, now seen corresponding path program 1 times [2021-12-15 09:00:38,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194520618] [2021-12-15 09:00:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:38,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:38,176 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 09:00:38,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194520618] [2021-12-15 09:00:38,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194520618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:38,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:38,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:38,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203781730] [2021-12-15 09:00:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:38,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:38,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:38,177 INFO L87 Difference]: Start difference. First operand 421 states and 635 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:40,191 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 09:00:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:40,483 INFO L93 Difference]: Finished difference Result 939 states and 1415 transitions. [2021-12-15 09:00:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-15 09:00:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:40,485 INFO L225 Difference]: With dead ends: 939 [2021-12-15 09:00:40,485 INFO L226 Difference]: Without dead ends: 539 [2021-12-15 09:00:40,486 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 09:00:40,486 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 111 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:40,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 333 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-15 09:00:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 464. [2021-12-15 09:00:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.511879049676026) internal successors, (700), 463 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 09:00:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 700 transitions. [2021-12-15 09:00:40,492 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 700 transitions. Word has length 125 [2021-12-15 09:00:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:40,492 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 700 transitions. [2021-12-15 09:00:40,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 700 transitions. [2021-12-15 09:00:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:00:40,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:40,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:40,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 09:00:40,493 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 528213158, now seen corresponding path program 1 times [2021-12-15 09:00:40,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:40,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936974742] [2021-12-15 09:00:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:40,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 09:00:40,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936974742] [2021-12-15 09:00:40,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936974742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:40,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:40,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:40,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684440696] [2021-12-15 09:00:40,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:40,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:40,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:40,565 INFO L87 Difference]: Start difference. First operand 464 states and 700 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 09:00:42,579 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 09:00:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:42,783 INFO L93 Difference]: Finished difference Result 990 states and 1492 transitions. [2021-12-15 09:00:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:42,784 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 126 [2021-12-15 09:00:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:42,785 INFO L225 Difference]: With dead ends: 990 [2021-12-15 09:00:42,785 INFO L226 Difference]: Without dead ends: 547 [2021-12-15 09:00:42,785 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 09:00:42,786 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 77 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:42,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 501 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-15 09:00:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 490. [2021-12-15 09:00:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.50920245398773) internal successors, (738), 489 states have internal predecessors, (738), 0 states have call successors, (0), 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 09:00:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 738 transitions. [2021-12-15 09:00:42,792 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 738 transitions. Word has length 126 [2021-12-15 09:00:42,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:42,793 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 738 transitions. [2021-12-15 09:00:42,793 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 09:00:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 738 transitions. [2021-12-15 09:00:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:00:42,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:42,805 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 09:00:42,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 09:00:42,806 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 404853660, now seen corresponding path program 1 times [2021-12-15 09:00:42,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129724839] [2021-12-15 09:00:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:42,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:42,880 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 09:00:42,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129724839] [2021-12-15 09:00:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129724839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:42,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:42,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:42,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215043686] [2021-12-15 09:00:42,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:42,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:42,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:42,883 INFO L87 Difference]: Start difference. First operand 490 states and 738 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 09:00:44,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,271 INFO L93 Difference]: Finished difference Result 1008 states and 1517 transitions. [2021-12-15 09:00:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:44,271 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 09:00:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,272 INFO L225 Difference]: With dead ends: 1008 [2021-12-15 09:00:44,272 INFO L226 Difference]: Without dead ends: 539 [2021-12-15 09:00:44,273 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 09:00:44,274 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 48 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 507 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:00:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-15 09:00:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 507. [2021-12-15 09:00:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.5059288537549407) internal successors, (762), 506 states have internal predecessors, (762), 0 states have call successors, (0), 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 09:00:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 762 transitions. [2021-12-15 09:00:44,280 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 762 transitions. Word has length 126 [2021-12-15 09:00:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,280 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 762 transitions. [2021-12-15 09:00:44,281 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 09:00:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 762 transitions. [2021-12-15 09:00:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:00:44,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 09:00:44,282 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1853069352, now seen corresponding path program 1 times [2021-12-15 09:00:44,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406443833] [2021-12-15 09:00:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:00:44,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:44,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406443833] [2021-12-15 09:00:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406443833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:44,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:44,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:44,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225132988] [2021-12-15 09:00:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:44,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:44,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,358 INFO L87 Difference]: Start difference. First operand 507 states and 762 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 09:00:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,387 INFO L93 Difference]: Finished difference Result 1434 states and 2172 transitions. [2021-12-15 09:00:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 126 [2021-12-15 09:00:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,390 INFO L225 Difference]: With dead ends: 1434 [2021-12-15 09:00:44,390 INFO L226 Difference]: Without dead ends: 948 [2021-12-15 09:00:44,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,391 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 436 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-12-15 09:00:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 948. [2021-12-15 09:00:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 1.504751847940866) internal successors, (1425), 947 states have internal predecessors, (1425), 0 states have call successors, (0), 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 09:00:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1425 transitions. [2021-12-15 09:00:44,402 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1425 transitions. Word has length 126 [2021-12-15 09:00:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,402 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1425 transitions. [2021-12-15 09:00:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 09:00:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1425 transitions. [2021-12-15 09:00:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:00:44,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 09:00:44,405 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash -565415126, now seen corresponding path program 1 times [2021-12-15 09:00:44,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914083659] [2021-12-15 09:00:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-15 09:00:44,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914083659] [2021-12-15 09:00:44,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914083659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:44,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:44,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:44,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827680904] [2021-12-15 09:00:44,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:44,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:44,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,463 INFO L87 Difference]: Start difference. First operand 948 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 09:00:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,485 INFO L93 Difference]: Finished difference Result 1902 states and 2862 transitions. [2021-12-15 09:00:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 09:00:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,488 INFO L225 Difference]: With dead ends: 1902 [2021-12-15 09:00:44,488 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 09:00:44,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,489 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 09:00:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 975. [2021-12-15 09:00:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 1.4989733059548254) internal successors, (1460), 974 states have internal predecessors, (1460), 0 states have call successors, (0), 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 09:00:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1460 transitions. [2021-12-15 09:00:44,510 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1460 transitions. Word has length 126 [2021-12-15 09:00:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1460 transitions. [2021-12-15 09:00:44,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 09:00:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1460 transitions. [2021-12-15 09:00:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:00:44,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 09:00:44,513 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash -446973652, now seen corresponding path program 1 times [2021-12-15 09:00:44,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168807091] [2021-12-15 09:00:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 09:00:44,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168807091] [2021-12-15 09:00:44,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168807091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:44,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:44,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:44,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604400270] [2021-12-15 09:00:44,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:44,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:44,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,569 INFO L87 Difference]: Start difference. First operand 975 states and 1460 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,587 INFO L93 Difference]: Finished difference Result 1931 states and 2898 transitions. [2021-12-15 09:00:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,589 INFO L225 Difference]: With dead ends: 1931 [2021-12-15 09:00:44,589 INFO L226 Difference]: Without dead ends: 977 [2021-12-15 09:00:44,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,591 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-15 09:00:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2021-12-15 09:00:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 1.4979508196721312) internal successors, (1462), 976 states have internal predecessors, (1462), 0 states have call successors, (0), 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 09:00:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1462 transitions. [2021-12-15 09:00:44,602 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1462 transitions. Word has length 126 [2021-12-15 09:00:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,602 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1462 transitions. [2021-12-15 09:00:44,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1462 transitions. [2021-12-15 09:00:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 09:00:44,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 09:00:44,604 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash 36761682, now seen corresponding path program 1 times [2021-12-15 09:00:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642039621] [2021-12-15 09:00:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 09:00:44,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642039621] [2021-12-15 09:00:44,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642039621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:44,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:44,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641601567] [2021-12-15 09:00:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:44,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:44,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,694 INFO L87 Difference]: Start difference. First operand 977 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 09:00:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,729 INFO L93 Difference]: Finished difference Result 2417 states and 3634 transitions. [2021-12-15 09:00:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 128 [2021-12-15 09:00:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,733 INFO L225 Difference]: With dead ends: 2417 [2021-12-15 09:00:44,733 INFO L226 Difference]: Without dead ends: 1463 [2021-12-15 09:00:44,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,734 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 373 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-12-15 09:00:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1461. [2021-12-15 09:00:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 1.5041095890410958) internal successors, (2196), 1460 states have internal predecessors, (2196), 0 states have call successors, (0), 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 09:00:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2196 transitions. [2021-12-15 09:00:44,750 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2196 transitions. Word has length 128 [2021-12-15 09:00:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,751 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 2196 transitions. [2021-12-15 09:00:44,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 09:00:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2196 transitions. [2021-12-15 09:00:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 09:00:44,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 09:00:44,753 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1271906027, now seen corresponding path program 1 times [2021-12-15 09:00:44,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316377999] [2021-12-15 09:00:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-15 09:00:44,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:44,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316377999] [2021-12-15 09:00:44,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316377999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:44,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:44,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:44,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429906375] [2021-12-15 09:00:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:44,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:44,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,842 INFO L87 Difference]: Start difference. First operand 1461 states and 2196 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:44,880 INFO L93 Difference]: Finished difference Result 1949 states and 2934 transitions. [2021-12-15 09:00:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:44,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-15 09:00:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:44,885 INFO L225 Difference]: With dead ends: 1949 [2021-12-15 09:00:44,885 INFO L226 Difference]: Without dead ends: 1947 [2021-12-15 09:00:44,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:44,886 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:44,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-12-15 09:00:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1945. [2021-12-15 09:00:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 1.507716049382716) internal successors, (2931), 1944 states have internal predecessors, (2931), 0 states have call successors, (0), 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 09:00:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2931 transitions. [2021-12-15 09:00:44,910 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2931 transitions. Word has length 129 [2021-12-15 09:00:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:44,910 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2931 transitions. [2021-12-15 09:00:44,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2931 transitions. [2021-12-15 09:00:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-15 09:00:44,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:44,913 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, 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 09:00:44,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 09:00:44,913 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash -757199029, now seen corresponding path program 1 times [2021-12-15 09:00:44,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041562080] [2021-12-15 09:00:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:44,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 09:00:45,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041562080] [2021-12-15 09:00:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041562080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:45,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:45,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:45,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543166452] [2021-12-15 09:00:45,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:45,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:45,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:45,029 INFO L87 Difference]: Start difference. First operand 1945 states and 2931 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 09:00:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:45,079 INFO L93 Difference]: Finished difference Result 4353 states and 6570 transitions. [2021-12-15 09:00:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 150 [2021-12-15 09:00:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:45,085 INFO L225 Difference]: With dead ends: 4353 [2021-12-15 09:00:45,085 INFO L226 Difference]: Without dead ends: 2431 [2021-12-15 09:00:45,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:45,087 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:45,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 569 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-12-15 09:00:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2429. [2021-12-15 09:00:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 1.5008237232289952) internal successors, (3644), 2428 states have internal predecessors, (3644), 0 states have call successors, (0), 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 09:00:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3644 transitions. [2021-12-15 09:00:45,117 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3644 transitions. Word has length 150 [2021-12-15 09:00:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:45,117 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 3644 transitions. [2021-12-15 09:00:45,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 09:00:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3644 transitions. [2021-12-15 09:00:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-15 09:00:45,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:45,120 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, 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 09:00:45,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 09:00:45,120 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1650407178, now seen corresponding path program 1 times [2021-12-15 09:00:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:45,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846538698] [2021-12-15 09:00:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:45,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-15 09:00:45,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846538698] [2021-12-15 09:00:45,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846538698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:45,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:45,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 09:00:45,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400498740] [2021-12-15 09:00:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:00:45,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:00:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:45,436 INFO L87 Difference]: Start difference. First operand 2429 states and 3644 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:00:47,441 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 []