./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:00:29,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:00:29,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:00:29,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:00:29,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:00:29,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:00:29,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:00:29,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:00:29,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:00:29,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:00:29,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:00:29,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:00:29,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:00:29,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:00:29,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:00:29,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:00:29,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:00:29,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:00:29,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:00:29,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:00:29,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:00:29,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:00:29,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:00:29,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:00:29,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:00:29,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:00:29,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:00:29,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:00:29,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:00:29,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:00:29,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:00:29,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:00:29,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:00:29,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:00:29,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:00:29,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:00:29,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:00:29,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:00:29,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:00:29,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:00:29,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:00:29,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:00:29,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:00:29,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:00:29,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:00:29,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:00:29,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:00:29,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:00:29,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:00:29,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:00:29,178 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:00:29,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:00:29,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:00:29,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:00:29,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:00:29,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:00:29,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:00:29,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:00:29,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:00:29,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:00:29,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:00:29,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:00:29,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:00:29,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:00:29,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:00:29,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 [2021-12-15 09:00:29,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:00:29,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:00:29,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:00:29,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:00:29,352 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:00:29,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2021-12-15 09:00:29,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2032a37df/f620135d4b0d44dda56170199b1819db/FLAG10fa9316e [2021-12-15 09:00:29,844 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:00:29,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2021-12-15 09:00:29,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2032a37df/f620135d4b0d44dda56170199b1819db/FLAG10fa9316e [2021-12-15 09:00:30,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2032a37df/f620135d4b0d44dda56170199b1819db [2021-12-15 09:00:30,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:00:30,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:00:30,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:00:30,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:00:30,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:00:30,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7148c730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30, skipping insertion in model container [2021-12-15 09:00:30,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:00:30,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:00:30,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2021-12-15 09:00:30,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:00:30,515 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:00:30,584 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2021-12-15 09:00:30,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:00:30,597 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:00:30,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30 WrapperNode [2021-12-15 09:00:30,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:00:30,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:00:30,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:00:30,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:00:30,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,688 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 804 [2021-12-15 09:00:30,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:00:30,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:00:30,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:00:30,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:00:30,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:00:30,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:00:30,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:00:30,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:00:30,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (1/1) ... [2021-12-15 09:00:30,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:00:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:00:30,805 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 09:00:30,808 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 09:00:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:00:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 09:00:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 09:00:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 09:00:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 09:00:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:00:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 09:00:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:00:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:00:30,982 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:00:30,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:00:30,995 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 09:00:33,077 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 09:00:33,077 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 09:00:33,077 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:00:33,083 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:00:33,086 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:00:33,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:00:33 BoogieIcfgContainer [2021-12-15 09:00:33,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:00:33,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:00:33,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:00:33,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:00:33,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:00:30" (1/3) ... [2021-12-15 09:00:33,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb55a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:00:33, skipping insertion in model container [2021-12-15 09:00:33,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:00:30" (2/3) ... [2021-12-15 09:00:33,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb55a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:00:33, skipping insertion in model container [2021-12-15 09:00:33,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:00:33" (3/3) ... [2021-12-15 09:00:33,106 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-1.c [2021-12-15 09:00:33,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:00:33,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:00:33,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:00:33,152 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 09:00:33,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:00:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 09:00:33,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:33,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:33,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:33,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777164, now seen corresponding path program 1 times [2021-12-15 09:00:33,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:33,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301947707] [2021-12-15 09:00:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:33,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:33,540 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 09:00:33,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301947707] [2021-12-15 09:00:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301947707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:33,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:33,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989872485] [2021-12-15 09:00:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:33,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:33,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:33,566 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:34,154 INFO L93 Difference]: Finished difference Result 337 states and 574 transitions. [2021-12-15 09:00:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-15 09:00:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:34,164 INFO L225 Difference]: With dead ends: 337 [2021-12-15 09:00:34,164 INFO L226 Difference]: Without dead ends: 171 [2021-12-15 09:00:34,166 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 09:00:34,168 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 36 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:34,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 621 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:00:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-15 09:00:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-12-15 09:00:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5751633986928104) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 241 transitions. [2021-12-15 09:00:34,197 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 241 transitions. Word has length 45 [2021-12-15 09:00:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:34,198 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 241 transitions. [2021-12-15 09:00:34,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 241 transitions. [2021-12-15 09:00:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 09:00:34,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:34,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:34,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:00:34,200 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1074933118, now seen corresponding path program 1 times [2021-12-15 09:00:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475360052] [2021-12-15 09:00:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:34,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:34,307 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 09:00:34,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:34,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475360052] [2021-12-15 09:00:34,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475360052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:34,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:34,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:34,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048825428] [2021-12-15 09:00:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:34,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:34,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:34,309 INFO L87 Difference]: Start difference. First operand 154 states and 241 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 09:00:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:34,760 INFO L93 Difference]: Finished difference Result 304 states and 470 transitions. [2021-12-15 09:00:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:34,761 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 09:00:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:34,762 INFO L225 Difference]: With dead ends: 304 [2021-12-15 09:00:34,762 INFO L226 Difference]: Without dead ends: 171 [2021-12-15 09:00:34,763 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 09:00:34,764 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 24 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:34,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 507 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:00:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-15 09:00:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-12-15 09:00:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5686274509803921) internal successors, (240), 153 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 240 transitions. [2021-12-15 09:00:34,780 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 240 transitions. Word has length 58 [2021-12-15 09:00:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:34,780 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 240 transitions. [2021-12-15 09:00:34,780 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 09:00:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 240 transitions. [2021-12-15 09:00:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 09:00:34,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:34,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:34,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:00:34,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 511226003, now seen corresponding path program 1 times [2021-12-15 09:00:34,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:34,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111391075] [2021-12-15 09:00:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:34,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:34,901 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 09:00:34,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:34,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111391075] [2021-12-15 09:00:34,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111391075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:34,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:34,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:34,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881956996] [2021-12-15 09:00:34,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:34,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:34,903 INFO L87 Difference]: Start difference. First operand 154 states and 240 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 09:00:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:35,535 INFO L93 Difference]: Finished difference Result 410 states and 643 transitions. [2021-12-15 09:00:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:35,536 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 09:00:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:35,537 INFO L225 Difference]: With dead ends: 410 [2021-12-15 09:00:35,537 INFO L226 Difference]: Without dead ends: 277 [2021-12-15 09:00:35,538 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 09:00:35,538 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 162 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:35,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 368 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-15 09:00:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 165. [2021-12-15 09:00:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5548780487804879) internal successors, (255), 164 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 255 transitions. [2021-12-15 09:00:35,551 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 255 transitions. Word has length 59 [2021-12-15 09:00:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 255 transitions. [2021-12-15 09:00:35,551 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 09:00:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 255 transitions. [2021-12-15 09:00:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 09:00:35,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:35,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:35,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:00:35,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1896837849, now seen corresponding path program 1 times [2021-12-15 09:00:35,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:35,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88158513] [2021-12-15 09:00:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:35,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:35,649 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 09:00:35,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88158513] [2021-12-15 09:00:35,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88158513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:35,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:35,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:35,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717267314] [2021-12-15 09:00:35,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:35,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:35,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:35,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:35,653 INFO L87 Difference]: Start difference. First operand 165 states and 255 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 09:00:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:36,198 INFO L93 Difference]: Finished difference Result 421 states and 657 transitions. [2021-12-15 09:00:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:36,198 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 09:00:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:36,200 INFO L225 Difference]: With dead ends: 421 [2021-12-15 09:00:36,200 INFO L226 Difference]: Without dead ends: 277 [2021-12-15 09:00:36,200 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 09:00:36,201 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 160 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:36,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 368 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:00:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-15 09:00:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2021-12-15 09:00:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 165 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 255 transitions. [2021-12-15 09:00:36,209 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 255 transitions. Word has length 59 [2021-12-15 09:00:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:36,209 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 255 transitions. [2021-12-15 09:00:36,209 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 09:00:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 255 transitions. [2021-12-15 09:00:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 09:00:36,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:36,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:36,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:00:36,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1546012670, now seen corresponding path program 1 times [2021-12-15 09:00:36,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612621688] [2021-12-15 09:00:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:36,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:36,290 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 09:00:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612621688] [2021-12-15 09:00:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612621688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:36,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:36,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:36,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246300412] [2021-12-15 09:00:36,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:36,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:36,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:36,292 INFO L87 Difference]: Start difference. First operand 166 states and 255 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 09:00:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:36,873 INFO L93 Difference]: Finished difference Result 421 states and 655 transitions. [2021-12-15 09:00:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:36,874 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 09:00:36,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:36,875 INFO L225 Difference]: With dead ends: 421 [2021-12-15 09:00:36,875 INFO L226 Difference]: Without dead ends: 276 [2021-12-15 09:00:36,876 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 09:00:36,876 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 153 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:36,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 370 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-15 09:00:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 172. [2021-12-15 09:00:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 171 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2021-12-15 09:00:36,883 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 59 [2021-12-15 09:00:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:36,883 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2021-12-15 09:00:36,883 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 09:00:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2021-12-15 09:00:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 09:00:36,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:36,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:36,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:00:36,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -457207618, now seen corresponding path program 1 times [2021-12-15 09:00:36,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:36,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065578935] [2021-12-15 09:00:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:36,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:36,963 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 09:00:36,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065578935] [2021-12-15 09:00:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065578935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:36,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:36,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:36,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140720312] [2021-12-15 09:00:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:36,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:36,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:36,965 INFO L87 Difference]: Start difference. First operand 172 states and 265 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 09:00:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:37,425 INFO L93 Difference]: Finished difference Result 336 states and 518 transitions. [2021-12-15 09:00:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:37,426 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 09:00:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:37,427 INFO L225 Difference]: With dead ends: 336 [2021-12-15 09:00:37,427 INFO L226 Difference]: Without dead ends: 185 [2021-12-15 09:00:37,427 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 09:00:37,428 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 19 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:37,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:00:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-15 09:00:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2021-12-15 09:00:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.543859649122807) internal successors, (264), 171 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2021-12-15 09:00:37,433 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 59 [2021-12-15 09:00:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:37,433 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2021-12-15 09:00:37,433 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 09:00:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2021-12-15 09:00:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 09:00:37,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:37,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:37,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:00:37,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash 385338667, now seen corresponding path program 1 times [2021-12-15 09:00:37,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:37,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012446379] [2021-12-15 09:00:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:37,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:37,503 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 09:00:37,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012446379] [2021-12-15 09:00:37,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012446379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:37,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:37,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:37,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125568009] [2021-12-15 09:00:37,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:37,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:37,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:37,506 INFO L87 Difference]: Start difference. First operand 172 states and 264 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 09:00:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:38,121 INFO L93 Difference]: Finished difference Result 427 states and 663 transitions. [2021-12-15 09:00:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:38,121 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 09:00:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:38,122 INFO L225 Difference]: With dead ends: 427 [2021-12-15 09:00:38,123 INFO L226 Difference]: Without dead ends: 276 [2021-12-15 09:00:38,123 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 09:00:38,124 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 157 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:38,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 370 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:38,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-15 09:00:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 172. [2021-12-15 09:00:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 171 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 262 transitions. [2021-12-15 09:00:38,128 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 262 transitions. Word has length 60 [2021-12-15 09:00:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:38,129 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 262 transitions. [2021-12-15 09:00:38,129 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 09:00:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 262 transitions. [2021-12-15 09:00:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 09:00:38,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:38,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:00:38,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -616870676, now seen corresponding path program 1 times [2021-12-15 09:00:38,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087593121] [2021-12-15 09:00:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:38,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:38,199 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 09:00:38,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087593121] [2021-12-15 09:00:38,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087593121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:38,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:38,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:38,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418464136] [2021-12-15 09:00:38,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:38,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:38,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:38,202 INFO L87 Difference]: Start difference. First operand 172 states and 262 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:38,892 INFO L93 Difference]: Finished difference Result 336 states and 514 transitions. [2021-12-15 09:00:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 09:00:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:38,893 INFO L225 Difference]: With dead ends: 336 [2021-12-15 09:00:38,893 INFO L226 Difference]: Without dead ends: 185 [2021-12-15 09:00:38,893 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 09:00:38,894 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:38,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:00:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-15 09:00:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2021-12-15 09:00:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 171 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 261 transitions. [2021-12-15 09:00:38,897 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 261 transitions. Word has length 61 [2021-12-15 09:00:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:38,898 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 261 transitions. [2021-12-15 09:00:38,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 261 transitions. [2021-12-15 09:00:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 09:00:38,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:38,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:38,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:00:38,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash -355826544, now seen corresponding path program 1 times [2021-12-15 09:00:38,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:38,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469174749] [2021-12-15 09:00:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:38,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:38,981 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 09:00:38,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469174749] [2021-12-15 09:00:38,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469174749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:38,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:38,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:38,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783479036] [2021-12-15 09:00:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:38,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:38,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:38,984 INFO L87 Difference]: Start difference. First operand 172 states and 261 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:39,797 INFO L93 Difference]: Finished difference Result 427 states and 659 transitions. [2021-12-15 09:00:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 09:00:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:39,798 INFO L225 Difference]: With dead ends: 427 [2021-12-15 09:00:39,798 INFO L226 Difference]: Without dead ends: 276 [2021-12-15 09:00:39,798 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 09:00:39,799 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 154 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:39,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 370 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:00:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-15 09:00:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 172. [2021-12-15 09:00:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5146198830409356) internal successors, (259), 171 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 259 transitions. [2021-12-15 09:00:39,803 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 259 transitions. Word has length 62 [2021-12-15 09:00:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:39,803 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 259 transitions. [2021-12-15 09:00:39,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 259 transitions. [2021-12-15 09:00:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 09:00:39,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:39,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:00:39,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -967699976, now seen corresponding path program 1 times [2021-12-15 09:00:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:39,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257936892] [2021-12-15 09:00:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:39,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:39,877 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 09:00:39,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257936892] [2021-12-15 09:00:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257936892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:39,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:39,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:39,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442976561] [2021-12-15 09:00:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:39,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:39,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:39,880 INFO L87 Difference]: Start difference. First operand 172 states and 259 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:40,629 INFO L93 Difference]: Finished difference Result 446 states and 683 transitions. [2021-12-15 09:00:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 09:00:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:40,630 INFO L225 Difference]: With dead ends: 446 [2021-12-15 09:00:40,630 INFO L226 Difference]: Without dead ends: 295 [2021-12-15 09:00:40,631 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 09:00:40,631 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 130 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:40,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 372 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:00:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-15 09:00:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 212. [2021-12-15 09:00:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5497630331753554) internal successors, (327), 211 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 09:00:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2021-12-15 09:00:40,636 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 327 transitions. Word has length 62 [2021-12-15 09:00:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:40,636 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 327 transitions. [2021-12-15 09:00:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 327 transitions. [2021-12-15 09:00:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 09:00:40,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:40,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:40,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:00:40,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1179024943, now seen corresponding path program 1 times [2021-12-15 09:00:40,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:40,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157508574] [2021-12-15 09:00:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:40,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:40,726 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 09:00:40,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:40,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157508574] [2021-12-15 09:00:40,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157508574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:40,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:40,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:40,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715268082] [2021-12-15 09:00:40,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:40,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:40,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:40,729 INFO L87 Difference]: Start difference. First operand 212 states and 327 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:41,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:42,121 INFO L93 Difference]: Finished difference Result 507 states and 792 transitions. [2021-12-15 09:00:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:42,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 09:00:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:42,122 INFO L225 Difference]: With dead ends: 507 [2021-12-15 09:00:42,122 INFO L226 Difference]: Without dead ends: 316 [2021-12-15 09:00:42,123 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 09:00:42,123 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 129 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:42,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 394 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:00:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-15 09:00:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 234. [2021-12-15 09:00:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5879828326180256) internal successors, (370), 233 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 370 transitions. [2021-12-15 09:00:42,128 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 370 transitions. Word has length 63 [2021-12-15 09:00:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 370 transitions. [2021-12-15 09:00:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 370 transitions. [2021-12-15 09:00:42,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 09:00:42,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:42,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:42,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:00:42,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash -242512679, now seen corresponding path program 1 times [2021-12-15 09:00:42,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:42,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967888418] [2021-12-15 09:00:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:42,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:00:42,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967888418] [2021-12-15 09:00:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967888418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:42,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:42,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:42,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559317250] [2021-12-15 09:00:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:42,228 INFO L87 Difference]: Start difference. First operand 234 states and 370 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:42,832 INFO L93 Difference]: Finished difference Result 605 states and 966 transitions. [2021-12-15 09:00:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-15 09:00:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:42,834 INFO L225 Difference]: With dead ends: 605 [2021-12-15 09:00:42,834 INFO L226 Difference]: Without dead ends: 392 [2021-12-15 09:00:42,834 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 09:00:42,835 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 135 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:42,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 382 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-15 09:00:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 298. [2021-12-15 09:00:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.6026936026936027) internal successors, (476), 297 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2021-12-15 09:00:42,840 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 91 [2021-12-15 09:00:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:42,841 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2021-12-15 09:00:42,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2021-12-15 09:00:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 09:00:42,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:42,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:42,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:00:42,842 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1283589986, now seen corresponding path program 1 times [2021-12-15 09:00:42,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845915890] [2021-12-15 09:00:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:42,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:00:42,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845915890] [2021-12-15 09:00:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845915890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:42,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:42,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740624619] [2021-12-15 09:00:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:42,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:42,947 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:43,556 INFO L93 Difference]: Finished difference Result 616 states and 986 transitions. [2021-12-15 09:00:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 09:00:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:43,558 INFO L225 Difference]: With dead ends: 616 [2021-12-15 09:00:43,558 INFO L226 Difference]: Without dead ends: 339 [2021-12-15 09:00:43,558 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 09:00:43,559 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 29 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:43,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 531 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-15 09:00:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 320. [2021-12-15 09:00:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.5956112852664577) internal successors, (509), 319 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 509 transitions. [2021-12-15 09:00:43,565 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 509 transitions. Word has length 97 [2021-12-15 09:00:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 509 transitions. [2021-12-15 09:00:43,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 509 transitions. [2021-12-15 09:00:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 09:00:43,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:43,567 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:00:43,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1578081581, now seen corresponding path program 1 times [2021-12-15 09:00:43,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956144167] [2021-12-15 09:00:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:43,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 09:00:43,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:43,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956144167] [2021-12-15 09:00:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956144167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:43,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:43,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:43,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365936659] [2021-12-15 09:00:43,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:43,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:43,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:43,659 INFO L87 Difference]: Start difference. First operand 320 states and 509 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:44,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:45,269 INFO L93 Difference]: Finished difference Result 741 states and 1179 transitions. [2021-12-15 09:00:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-15 09:00:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:45,273 INFO L225 Difference]: With dead ends: 741 [2021-12-15 09:00:45,273 INFO L226 Difference]: Without dead ends: 442 [2021-12-15 09:00:45,273 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 09:00:45,274 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 152 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:45,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 394 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:00:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-15 09:00:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 336. [2021-12-15 09:00:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5731343283582089) internal successors, (527), 335 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 527 transitions. [2021-12-15 09:00:45,282 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 527 transitions. Word has length 104 [2021-12-15 09:00:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:45,283 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 527 transitions. [2021-12-15 09:00:45,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 527 transitions. [2021-12-15 09:00:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 09:00:45,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:45,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:45,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:00:45,284 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash 812761615, now seen corresponding path program 1 times [2021-12-15 09:00:45,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:45,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353831248] [2021-12-15 09:00:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:45,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 09:00:45,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353831248] [2021-12-15 09:00:45,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353831248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:45,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:45,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:45,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703203061] [2021-12-15 09:00:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:45,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:45,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:45,354 INFO L87 Difference]: Start difference. First operand 336 states and 527 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:46,148 INFO L93 Difference]: Finished difference Result 668 states and 1052 transitions. [2021-12-15 09:00:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:46,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-15 09:00:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:46,149 INFO L225 Difference]: With dead ends: 668 [2021-12-15 09:00:46,149 INFO L226 Difference]: Without dead ends: 353 [2021-12-15 09:00:46,150 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 09:00:46,150 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 32 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:46,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:00:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-15 09:00:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 336. [2021-12-15 09:00:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5701492537313433) internal successors, (526), 335 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 526 transitions. [2021-12-15 09:00:46,156 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 526 transitions. Word has length 105 [2021-12-15 09:00:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 526 transitions. [2021-12-15 09:00:46,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 526 transitions. [2021-12-15 09:00:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-15 09:00:46,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:46,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:46,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:00:46,157 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1336050218, now seen corresponding path program 1 times [2021-12-15 09:00:46,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:46,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914889830] [2021-12-15 09:00:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:46,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 09:00:46,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914889830] [2021-12-15 09:00:46,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914889830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:46,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:46,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:46,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520417621] [2021-12-15 09:00:46,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:46,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:46,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:46,290 INFO L87 Difference]: Start difference. First operand 336 states and 526 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:46,825 INFO L93 Difference]: Finished difference Result 658 states and 1037 transitions. [2021-12-15 09:00:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-15 09:00:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:46,827 INFO L225 Difference]: With dead ends: 658 [2021-12-15 09:00:46,827 INFO L226 Difference]: Without dead ends: 343 [2021-12-15 09:00:46,828 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 09:00:46,828 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 27 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:46,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 549 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:00:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-15 09:00:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 336. [2021-12-15 09:00:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5671641791044777) internal successors, (525), 335 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 525 transitions. [2021-12-15 09:00:46,835 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 525 transitions. Word has length 113 [2021-12-15 09:00:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:46,835 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 525 transitions. [2021-12-15 09:00:46,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 525 transitions. [2021-12-15 09:00:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 09:00:46,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:46,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:46,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:00:46,837 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash 283071561, now seen corresponding path program 1 times [2021-12-15 09:00:46,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:46,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218855633] [2021-12-15 09:00:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:46,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:46,925 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 09:00:46,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218855633] [2021-12-15 09:00:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218855633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:46,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:46,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:46,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593871959] [2021-12-15 09:00:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:46,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:46,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:46,927 INFO L87 Difference]: Start difference. First operand 336 states and 525 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:48,185 INFO L93 Difference]: Finished difference Result 750 states and 1174 transitions. [2021-12-15 09:00:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:48,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-15 09:00:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:48,187 INFO L225 Difference]: With dead ends: 750 [2021-12-15 09:00:48,187 INFO L226 Difference]: Without dead ends: 435 [2021-12-15 09:00:48,187 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 09:00:48,188 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 88 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:48,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 503 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:00:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-12-15 09:00:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 375. [2021-12-15 09:00:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.572192513368984) internal successors, (588), 374 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 588 transitions. [2021-12-15 09:00:48,194 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 588 transitions. Word has length 119 [2021-12-15 09:00:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:48,195 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 588 transitions. [2021-12-15 09:00:48,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:48,195 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 588 transitions. [2021-12-15 09:00:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-15 09:00:48,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:48,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:48,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:00:48,196 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1794265337, now seen corresponding path program 1 times [2021-12-15 09:00:48,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:48,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277399480] [2021-12-15 09:00:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:48,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 09:00:48,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277399480] [2021-12-15 09:00:48,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277399480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:48,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:48,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:48,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502579751] [2021-12-15 09:00:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:48,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:48,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:48,290 INFO L87 Difference]: Start difference. First operand 375 states and 588 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:50,295 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 09:00:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:50,520 INFO L93 Difference]: Finished difference Result 777 states and 1220 transitions. [2021-12-15 09:00:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-15 09:00:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:50,522 INFO L225 Difference]: With dead ends: 777 [2021-12-15 09:00:50,522 INFO L226 Difference]: Without dead ends: 423 [2021-12-15 09:00:50,523 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 09:00:50,523 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 36 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:50,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 627 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-15 09:00:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 399. [2021-12-15 09:00:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.5678391959798994) internal successors, (624), 398 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 09:00:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 624 transitions. [2021-12-15 09:00:50,530 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 624 transitions. Word has length 119 [2021-12-15 09:00:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:50,530 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 624 transitions. [2021-12-15 09:00:50,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 624 transitions. [2021-12-15 09:00:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-15 09:00:50,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:50,532 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:50,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:00:50,532 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1331910876, now seen corresponding path program 1 times [2021-12-15 09:00:50,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558664972] [2021-12-15 09:00:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:50,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:50,612 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 09:00:50,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558664972] [2021-12-15 09:00:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558664972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:50,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:50,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:50,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136590747] [2021-12-15 09:00:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:50,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:50,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:50,614 INFO L87 Difference]: Start difference. First operand 399 states and 624 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:51,052 INFO L93 Difference]: Finished difference Result 834 states and 1304 transitions. [2021-12-15 09:00:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-15 09:00:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:51,054 INFO L225 Difference]: With dead ends: 834 [2021-12-15 09:00:51,054 INFO L226 Difference]: Without dead ends: 456 [2021-12-15 09:00:51,055 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 09:00:51,055 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 83 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:51,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 497 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:00:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-15 09:00:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 400. [2021-12-15 09:00:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.5664160401002507) internal successors, (625), 399 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 625 transitions. [2021-12-15 09:00:51,061 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 625 transitions. Word has length 120 [2021-12-15 09:00:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 625 transitions. [2021-12-15 09:00:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 625 transitions. [2021-12-15 09:00:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 09:00:51,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:51,074 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:51,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:00:51,074 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1360190488, now seen corresponding path program 1 times [2021-12-15 09:00:51,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:51,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761025277] [2021-12-15 09:00:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:51,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:51,150 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 09:00:51,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761025277] [2021-12-15 09:00:51,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761025277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:51,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:51,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:51,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076294610] [2021-12-15 09:00:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:51,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:51,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:51,152 INFO L87 Difference]: Start difference. First operand 400 states and 625 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:52,190 INFO L93 Difference]: Finished difference Result 901 states and 1410 transitions. [2021-12-15 09:00:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-15 09:00:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:52,195 INFO L225 Difference]: With dead ends: 901 [2021-12-15 09:00:52,196 INFO L226 Difference]: Without dead ends: 522 [2021-12-15 09:00:52,196 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 09:00:52,198 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 124 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:52,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 395 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 09:00:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-15 09:00:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 443. [2021-12-15 09:00:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5746606334841629) internal successors, (696), 442 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 696 transitions. [2021-12-15 09:00:52,210 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 696 transitions. Word has length 127 [2021-12-15 09:00:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:52,211 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 696 transitions. [2021-12-15 09:00:52,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 696 transitions. [2021-12-15 09:00:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 09:00:52,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:52,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:52,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 09:00:52,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1652766710, now seen corresponding path program 1 times [2021-12-15 09:00:52,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:52,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523969212] [2021-12-15 09:00:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:52,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:00:52,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523969212] [2021-12-15 09:00:52,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523969212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:52,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514448344] [2021-12-15 09:00:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:52,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:52,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:52,294 INFO L87 Difference]: Start difference. First operand 443 states and 696 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:54,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:54,395 INFO L93 Difference]: Finished difference Result 919 states and 1443 transitions. [2021-12-15 09:00:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-15 09:00:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:54,397 INFO L225 Difference]: With dead ends: 919 [2021-12-15 09:00:54,397 INFO L226 Difference]: Without dead ends: 497 [2021-12-15 09:00:54,398 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 09:00:54,398 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 102 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:54,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 499 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:00:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-15 09:00:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 443. [2021-12-15 09:00:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5723981900452488) internal successors, (695), 442 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 695 transitions. [2021-12-15 09:00:54,405 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 695 transitions. Word has length 127 [2021-12-15 09:00:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:54,406 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 695 transitions. [2021-12-15 09:00:54,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 695 transitions. [2021-12-15 09:00:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 09:00:54,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:54,407 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:54,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 09:00:54,407 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash -226364236, now seen corresponding path program 1 times [2021-12-15 09:00:54,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:54,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954279274] [2021-12-15 09:00:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:54,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:00:54,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954279274] [2021-12-15 09:00:54,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954279274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:54,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:54,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:54,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977818380] [2021-12-15 09:00:54,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:54,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:54,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:54,486 INFO L87 Difference]: Start difference. First operand 443 states and 695 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:55,097 INFO L93 Difference]: Finished difference Result 947 states and 1484 transitions. [2021-12-15 09:00:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-15 09:00:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:55,100 INFO L225 Difference]: With dead ends: 947 [2021-12-15 09:00:55,100 INFO L226 Difference]: Without dead ends: 525 [2021-12-15 09:00:55,101 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 09:00:55,101 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 151 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:55,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 370 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:00:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-15 09:00:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 443. [2021-12-15 09:00:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5588235294117647) internal successors, (689), 442 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 689 transitions. [2021-12-15 09:00:55,108 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 689 transitions. Word has length 127 [2021-12-15 09:00:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 689 transitions. [2021-12-15 09:00:55,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 689 transitions. [2021-12-15 09:00:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 09:00:55,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:55,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:55,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 09:00:55,110 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash -896195165, now seen corresponding path program 1 times [2021-12-15 09:00:55,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:55,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716577312] [2021-12-15 09:00:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:55,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:55,190 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 09:00:55,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716577312] [2021-12-15 09:00:55,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716577312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:55,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:55,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:55,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213142572] [2021-12-15 09:00:55,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:55,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:55,192 INFO L87 Difference]: Start difference. First operand 443 states and 689 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:56,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:57,077 INFO L93 Difference]: Finished difference Result 947 states and 1472 transitions. [2021-12-15 09:00:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 09:00:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:57,079 INFO L225 Difference]: With dead ends: 947 [2021-12-15 09:00:57,079 INFO L226 Difference]: Without dead ends: 523 [2021-12-15 09:00:57,080 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 09:00:57,080 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 124 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 370 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 09:00:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-15 09:00:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 445. [2021-12-15 09:00:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.5585585585585586) internal successors, (692), 444 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 692 transitions. [2021-12-15 09:00:57,087 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 692 transitions. Word has length 128 [2021-12-15 09:00:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:57,087 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 692 transitions. [2021-12-15 09:00:57,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 692 transitions. [2021-12-15 09:00:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 09:00:57,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:57,089 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 09:00:57,089 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -248569583, now seen corresponding path program 1 times [2021-12-15 09:00:57,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473809618] [2021-12-15 09:00:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:57,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 09:00:57,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473809618] [2021-12-15 09:00:57,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473809618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:57,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:57,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 09:00:57,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055147747] [2021-12-15 09:00:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:57,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:00:57,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:00:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:57,166 INFO L87 Difference]: Start difference. First operand 445 states and 692 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:58,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:59,917 INFO L93 Difference]: Finished difference Result 879 states and 1372 transitions. [2021-12-15 09:00:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 09:00:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-15 09:00:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:59,918 INFO L225 Difference]: With dead ends: 879 [2021-12-15 09:00:59,918 INFO L226 Difference]: Without dead ends: 455 [2021-12-15 09:00:59,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:00:59,919 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 160 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:59,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 392 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:00:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-15 09:00:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 454. [2021-12-15 09:00:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.5518763796909492) internal successors, (703), 453 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 703 transitions. [2021-12-15 09:00:59,926 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 703 transitions. Word has length 135 [2021-12-15 09:00:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:59,926 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 703 transitions. [2021-12-15 09:00:59,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 703 transitions. [2021-12-15 09:00:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 09:00:59,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:59,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:59,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 09:00:59,928 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1208643902, now seen corresponding path program 1 times [2021-12-15 09:00:59,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990265050] [2021-12-15 09:00:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:59,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:00:59,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:59,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990265050] [2021-12-15 09:00:59,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990265050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:59,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:59,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:59,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010986305] [2021-12-15 09:00:59,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:59,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:59,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:59,998 INFO L87 Difference]: Start difference. First operand 454 states and 703 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 09:01:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:00,695 INFO L93 Difference]: Finished difference Result 925 states and 1435 transitions. [2021-12-15 09:01:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:00,695 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 136 [2021-12-15 09:01:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:00,697 INFO L225 Difference]: With dead ends: 925 [2021-12-15 09:01:00,697 INFO L226 Difference]: Without dead ends: 492 [2021-12-15 09:01:00,697 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 09:01:00,698 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 89 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:00,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 519 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:01:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-15 09:01:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 454. [2021-12-15 09:01:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.5496688741721854) internal successors, (702), 453 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 702 transitions. [2021-12-15 09:01:00,705 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 702 transitions. Word has length 136 [2021-12-15 09:01:00,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:00,705 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 702 transitions. [2021-12-15 09:01:00,705 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 09:01:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 702 transitions. [2021-12-15 09:01:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 09:01:00,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:00,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:00,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 09:01:00,707 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash 325134912, now seen corresponding path program 1 times [2021-12-15 09:01:00,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:00,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929821697] [2021-12-15 09:01:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:00,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:01:00,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929821697] [2021-12-15 09:01:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929821697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:00,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:00,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:00,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808298387] [2021-12-15 09:01:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:00,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:00,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:00,789 INFO L87 Difference]: Start difference. First operand 454 states and 702 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 09:01:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:01,240 INFO L93 Difference]: Finished difference Result 899 states and 1396 transitions. [2021-12-15 09:01:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:01,240 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 136 [2021-12-15 09:01:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:01,242 INFO L225 Difference]: With dead ends: 899 [2021-12-15 09:01:01,242 INFO L226 Difference]: Without dead ends: 466 [2021-12-15 09:01:01,242 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 09:01:01,243 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 37 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:01,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 613 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:01:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-15 09:01:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 454. [2021-12-15 09:01:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.5474613686534215) internal successors, (701), 453 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 701 transitions. [2021-12-15 09:01:01,250 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 701 transitions. Word has length 136 [2021-12-15 09:01:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:01,250 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 701 transitions. [2021-12-15 09:01:01,250 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 09:01:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 701 transitions. [2021-12-15 09:01:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 09:01:01,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:01,251 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:01,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 09:01:01,252 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash 455121871, now seen corresponding path program 1 times [2021-12-15 09:01:01,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:01,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087896422] [2021-12-15 09:01:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:01,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:01:01,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087896422] [2021-12-15 09:01:01,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087896422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:01,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:01,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:01,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125426875] [2021-12-15 09:01:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:01,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:01,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:01,325 INFO L87 Difference]: Start difference. First operand 454 states and 701 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:01,906 INFO L93 Difference]: Finished difference Result 1007 states and 1556 transitions. [2021-12-15 09:01:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:01,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-15 09:01:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:01,907 INFO L225 Difference]: With dead ends: 1007 [2021-12-15 09:01:01,908 INFO L226 Difference]: Without dead ends: 574 [2021-12-15 09:01:01,908 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 09:01:01,908 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 135 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:01,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 380 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:01:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-12-15 09:01:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 484. [2021-12-15 09:01:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5383022774327122) internal successors, (743), 483 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 743 transitions. [2021-12-15 09:01:01,916 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 743 transitions. Word has length 140 [2021-12-15 09:01:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:01,916 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 743 transitions. [2021-12-15 09:01:01,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 743 transitions. [2021-12-15 09:01:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 09:01:01,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:01,918 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:01,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 09:01:01,918 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1327956610, now seen corresponding path program 1 times [2021-12-15 09:01:01,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:01,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419257454] [2021-12-15 09:01:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:01,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:01:01,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:01,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419257454] [2021-12-15 09:01:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419257454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:01,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:01,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:01,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307880180] [2021-12-15 09:01:01,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:01,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:01,999 INFO L87 Difference]: Start difference. First operand 484 states and 743 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:02,670 INFO L93 Difference]: Finished difference Result 1025 states and 1572 transitions. [2021-12-15 09:01:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:02,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 09:01:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:02,672 INFO L225 Difference]: With dead ends: 1025 [2021-12-15 09:01:02,672 INFO L226 Difference]: Without dead ends: 562 [2021-12-15 09:01:02,676 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 09:01:02,682 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 418 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:01:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-15 09:01:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 484. [2021-12-15 09:01:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5238095238095237) internal successors, (736), 483 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 736 transitions. [2021-12-15 09:01:02,690 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 736 transitions. Word has length 141 [2021-12-15 09:01:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:02,691 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 736 transitions. [2021-12-15 09:01:02,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 736 transitions. [2021-12-15 09:01:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 09:01:02,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:02,692 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:02,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 09:01:02,692 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1379537561, now seen corresponding path program 1 times [2021-12-15 09:01:02,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:02,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062072397] [2021-12-15 09:01:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:02,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:01:02,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062072397] [2021-12-15 09:01:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062072397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:02,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:02,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:02,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843808088] [2021-12-15 09:01:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:02,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:02,781 INFO L87 Difference]: Start difference. First operand 484 states and 736 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:03,528 INFO L93 Difference]: Finished difference Result 983 states and 1499 transitions. [2021-12-15 09:01:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 09:01:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:03,530 INFO L225 Difference]: With dead ends: 983 [2021-12-15 09:01:03,530 INFO L226 Difference]: Without dead ends: 520 [2021-12-15 09:01:03,531 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 09:01:03,531 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 68 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:03,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 537 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:01:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-15 09:01:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 484. [2021-12-15 09:01:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5217391304347827) internal successors, (735), 483 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 735 transitions. [2021-12-15 09:01:03,539 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 735 transitions. Word has length 141 [2021-12-15 09:01:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:03,539 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 735 transitions. [2021-12-15 09:01:03,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 735 transitions. [2021-12-15 09:01:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 09:01:03,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:03,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:03,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 09:01:03,541 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:03,541 INFO L85 PathProgramCache]: Analyzing trace with hash -578446656, now seen corresponding path program 1 times [2021-12-15 09:01:03,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383745763] [2021-12-15 09:01:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:03,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:01:03,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383745763] [2021-12-15 09:01:03,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383745763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:03,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:03,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:03,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737808349] [2021-12-15 09:01:03,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:03,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:03,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:03,615 INFO L87 Difference]: Start difference. First operand 484 states and 735 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:03,674 INFO L93 Difference]: Finished difference Result 1407 states and 2153 transitions. [2021-12-15 09:01:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:03,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 09:01:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:03,677 INFO L225 Difference]: With dead ends: 1407 [2021-12-15 09:01:03,677 INFO L226 Difference]: Without dead ends: 944 [2021-12-15 09:01:03,678 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 09:01:03,679 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:03,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 445 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-12-15 09:01:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 944. [2021-12-15 09:01:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.5132555673382821) internal successors, (1427), 943 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1427 transitions. [2021-12-15 09:01:03,693 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1427 transitions. Word has length 141 [2021-12-15 09:01:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:03,693 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1427 transitions. [2021-12-15 09:01:03,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1427 transitions. [2021-12-15 09:01:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 09:01:03,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:03,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:03,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 09:01:03,695 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1319050110, now seen corresponding path program 1 times [2021-12-15 09:01:03,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:03,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225456984] [2021-12-15 09:01:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:03,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:01:03,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225456984] [2021-12-15 09:01:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225456984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:03,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:03,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:03,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358212162] [2021-12-15 09:01:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:03,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:03,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:03,767 INFO L87 Difference]: Start difference. First operand 944 states and 1427 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:03,800 INFO L93 Difference]: Finished difference Result 1894 states and 2866 transitions. [2021-12-15 09:01:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 09:01:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:03,803 INFO L225 Difference]: With dead ends: 1894 [2021-12-15 09:01:03,803 INFO L226 Difference]: Without dead ends: 971 [2021-12-15 09:01:03,803 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 09:01:03,804 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:03,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-12-15 09:01:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 971. [2021-12-15 09:01:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5072164948453608) internal successors, (1462), 970 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 09:01:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1462 transitions. [2021-12-15 09:01:03,817 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1462 transitions. Word has length 141 [2021-12-15 09:01:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:03,818 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1462 transitions. [2021-12-15 09:01:03,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1462 transitions. [2021-12-15 09:01:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 09:01:03,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:03,820 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:03,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 09:01:03,820 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:03,820 INFO L85 PathProgramCache]: Analyzing trace with hash 226414908, now seen corresponding path program 1 times [2021-12-15 09:01:03,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620689794] [2021-12-15 09:01:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:03,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:01:03,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620689794] [2021-12-15 09:01:03,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620689794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:03,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:03,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:03,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673996914] [2021-12-15 09:01:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:03,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:03,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:03,878 INFO L87 Difference]: Start difference. First operand 971 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:03,909 INFO L93 Difference]: Finished difference Result 1923 states and 2902 transitions. [2021-12-15 09:01:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 09:01:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:03,911 INFO L225 Difference]: With dead ends: 1923 [2021-12-15 09:01:03,912 INFO L226 Difference]: Without dead ends: 973 [2021-12-15 09:01:03,913 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 09:01:03,914 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:03,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-15 09:01:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2021-12-15 09:01:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.5061728395061729) internal successors, (1464), 972 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1464 transitions. [2021-12-15 09:01:03,930 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1464 transitions. Word has length 141 [2021-12-15 09:01:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:03,930 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1464 transitions. [2021-12-15 09:01:03,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1464 transitions. [2021-12-15 09:01:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:01:03,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:03,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:03,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 09:01:03,933 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1583242070, now seen corresponding path program 1 times [2021-12-15 09:01:03,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122180086] [2021-12-15 09:01:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:03,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 09:01:04,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:04,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122180086] [2021-12-15 09:01:04,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122180086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:04,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:04,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572424086] [2021-12-15 09:01:04,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:04,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:04,020 INFO L87 Difference]: Start difference. First operand 973 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:04,076 INFO L93 Difference]: Finished difference Result 2383 states and 3609 transitions. [2021-12-15 09:01:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:01:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:04,080 INFO L225 Difference]: With dead ends: 2383 [2021-12-15 09:01:04,080 INFO L226 Difference]: Without dead ends: 1433 [2021-12-15 09:01:04,081 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 09:01:04,081 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:04,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 582 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-15 09:01:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1433. [2021-12-15 09:01:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.505586592178771) internal successors, (2156), 1432 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2156 transitions. [2021-12-15 09:01:04,101 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2156 transitions. Word has length 143 [2021-12-15 09:01:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:04,101 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2156 transitions. [2021-12-15 09:01:04,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2156 transitions. [2021-12-15 09:01:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-15 09:01:04,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:04,104 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:04,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 09:01:04,104 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash 404174959, now seen corresponding path program 1 times [2021-12-15 09:01:04,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:04,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252953066] [2021-12-15 09:01:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:04,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:01:04,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252953066] [2021-12-15 09:01:04,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252953066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:04,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:04,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:04,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072100750] [2021-12-15 09:01:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:04,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:04,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:04,189 INFO L87 Difference]: Start difference. First operand 1433 states and 2156 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:05,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:01:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:05,872 INFO L93 Difference]: Finished difference Result 3023 states and 4543 transitions. [2021-12-15 09:01:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 172 [2021-12-15 09:01:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:05,876 INFO L225 Difference]: With dead ends: 3023 [2021-12-15 09:01:05,877 INFO L226 Difference]: Without dead ends: 1613 [2021-12-15 09:01:05,878 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 09:01:05,878 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 48 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:05,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 639 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:01:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-15 09:01:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1517. [2021-12-15 09:01:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.5052770448548813) internal successors, (2282), 1516 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2282 transitions. [2021-12-15 09:01:05,898 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2282 transitions. Word has length 172 [2021-12-15 09:01:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:05,898 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 2282 transitions. [2021-12-15 09:01:05,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2282 transitions. [2021-12-15 09:01:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-15 09:01:05,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:05,901 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:05,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 09:01:05,901 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash -792814120, now seen corresponding path program 1 times [2021-12-15 09:01:05,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:05,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311587492] [2021-12-15 09:01:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:05,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-15 09:01:06,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311587492] [2021-12-15 09:01:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311587492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:06,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892233420] [2021-12-15 09:01:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:06,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:06,018 INFO L87 Difference]: Start difference. First operand 1517 states and 2282 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:07,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:01:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:07,350 INFO L93 Difference]: Finished difference Result 3077 states and 4630 transitions. [2021-12-15 09:01:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 189 [2021-12-15 09:01:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:07,363 INFO L225 Difference]: With dead ends: 3077 [2021-12-15 09:01:07,364 INFO L226 Difference]: Without dead ends: 1583 [2021-12-15 09:01:07,365 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 09:01:07,365 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 54 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:07,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 627 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:01:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-15 09:01:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1517. [2021-12-15 09:01:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.5032981530343008) internal successors, (2279), 1516 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2279 transitions. [2021-12-15 09:01:07,386 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2279 transitions. Word has length 189 [2021-12-15 09:01:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:07,386 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 2279 transitions. [2021-12-15 09:01:07,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2279 transitions. [2021-12-15 09:01:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 09:01:07,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:07,389 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:07,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 09:01:07,389 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1305877490, now seen corresponding path program 1 times [2021-12-15 09:01:07,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:07,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888511377] [2021-12-15 09:01:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:07,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-15 09:01:07,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:07,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888511377] [2021-12-15 09:01:07,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888511377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:07,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:07,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:07,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284994278] [2021-12-15 09:01:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:07,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:07,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:07,481 INFO L87 Difference]: Start difference. First operand 1517 states and 2279 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:08,737 INFO L93 Difference]: Finished difference Result 3240 states and 4833 transitions. [2021-12-15 09:01:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 195 [2021-12-15 09:01:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:08,745 INFO L225 Difference]: With dead ends: 3240 [2021-12-15 09:01:08,745 INFO L226 Difference]: Without dead ends: 1746 [2021-12-15 09:01:08,746 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 09:01:08,747 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 140 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:08,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 384 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:01:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-12-15 09:01:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1517. [2021-12-15 09:01:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 1.487467018469657) internal successors, (2255), 1516 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2255 transitions. [2021-12-15 09:01:08,767 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2255 transitions. Word has length 195 [2021-12-15 09:01:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:08,767 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 2255 transitions. [2021-12-15 09:01:08,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2255 transitions. [2021-12-15 09:01:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 09:01:08,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:08,770 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 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 09:01:08,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 09:01:08,770 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -236025102, now seen corresponding path program 1 times [2021-12-15 09:01:08,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870436242] [2021-12-15 09:01:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:08,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-15 09:01:08,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870436242] [2021-12-15 09:01:08,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870436242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:08,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:08,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984021182] [2021-12-15 09:01:08,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:08,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:08,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:08,857 INFO L87 Difference]: Start difference. First operand 1517 states and 2255 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:08,927 INFO L93 Difference]: Finished difference Result 3499 states and 5224 transitions. [2021-12-15 09:01:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-15 09:01:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:08,932 INFO L225 Difference]: With dead ends: 3499 [2021-12-15 09:01:08,932 INFO L226 Difference]: Without dead ends: 2005 [2021-12-15 09:01:08,933 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 09:01:08,933 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 151 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:08,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 584 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-12-15 09:01:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 2005. [2021-12-15 09:01:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.4870259481037924) internal successors, (2980), 2004 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2980 transitions. [2021-12-15 09:01:08,959 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2980 transitions. Word has length 197 [2021-12-15 09:01:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:08,959 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 2980 transitions. [2021-12-15 09:01:08,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2980 transitions. [2021-12-15 09:01:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 09:01:08,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:08,962 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:08,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-15 09:01:08,962 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1785235534, now seen corresponding path program 1 times [2021-12-15 09:01:08,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:08,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520605796] [2021-12-15 09:01:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:08,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-15 09:01:09,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520605796] [2021-12-15 09:01:09,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520605796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:09,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:09,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:09,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111925104] [2021-12-15 09:01:09,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:09,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:09,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:09,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:09,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:09,061 INFO L87 Difference]: Start difference. First operand 2005 states and 2980 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 09:01:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:09,141 INFO L93 Difference]: Finished difference Result 4476 states and 6675 transitions. [2021-12-15 09:01:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 197 [2021-12-15 09:01:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:09,147 INFO L225 Difference]: With dead ends: 4476 [2021-12-15 09:01:09,147 INFO L226 Difference]: Without dead ends: 2494 [2021-12-15 09:01:09,149 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 09:01:09,149 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:09,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 380 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-12-15 09:01:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2494. [2021-12-15 09:01:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 1.48896911351785) internal successors, (3712), 2493 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3712 transitions. [2021-12-15 09:01:09,183 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3712 transitions. Word has length 197 [2021-12-15 09:01:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:09,183 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 3712 transitions. [2021-12-15 09:01:09,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 09:01:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3712 transitions. [2021-12-15 09:01:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 09:01:09,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:09,186 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:09,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-15 09:01:09,186 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -830555530, now seen corresponding path program 1 times [2021-12-15 09:01:09,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:09,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220312766] [2021-12-15 09:01:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:09,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:01:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220312766] [2021-12-15 09:01:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220312766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:09,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:09,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:09,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102971676] [2021-12-15 09:01:09,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:09,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:09,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:09,340 INFO L87 Difference]: Start difference. First operand 2494 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:09,405 INFO L93 Difference]: Finished difference Result 5454 states and 8139 transitions. [2021-12-15 09:01:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-12-15 09:01:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:09,417 INFO L225 Difference]: With dead ends: 5454 [2021-12-15 09:01:09,417 INFO L226 Difference]: Without dead ends: 2983 [2021-12-15 09:01:09,420 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 09:01:09,421 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:09,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 379 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-12-15 09:01:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2983. [2021-12-15 09:01:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 1.4906103286384977) internal successors, (4445), 2982 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 4445 transitions. [2021-12-15 09:01:09,463 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 4445 transitions. Word has length 235 [2021-12-15 09:01:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:09,463 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 4445 transitions. [2021-12-15 09:01:09,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 4445 transitions. [2021-12-15 09:01:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 09:01:09,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:09,467 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:09,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-15 09:01:09,478 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash 82858912, now seen corresponding path program 1 times [2021-12-15 09:01:09,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206627025] [2021-12-15 09:01:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:09,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:01:09,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:09,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206627025] [2021-12-15 09:01:09,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206627025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:09,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:09,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:09,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578518922] [2021-12-15 09:01:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:09,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:09,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:09,581 INFO L87 Difference]: Start difference. First operand 2983 states and 4445 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:09,675 INFO L93 Difference]: Finished difference Result 6432 states and 9605 transitions. [2021-12-15 09:01:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-12-15 09:01:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:09,681 INFO L225 Difference]: With dead ends: 6432 [2021-12-15 09:01:09,681 INFO L226 Difference]: Without dead ends: 3472 [2021-12-15 09:01:09,683 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 09:01:09,683 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:09,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 378 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:01:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-12-15 09:01:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 3472. [2021-12-15 09:01:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 1.4920772111783347) internal successors, (5179), 3471 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5179 transitions. [2021-12-15 09:01:09,737 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5179 transitions. Word has length 237 [2021-12-15 09:01:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:09,738 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 5179 transitions. [2021-12-15 09:01:09,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5179 transitions. [2021-12-15 09:01:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:01:09,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:09,743 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-15 09:01:09,744 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 205602834, now seen corresponding path program 1 times [2021-12-15 09:01:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122874385] [2021-12-15 09:01:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:09,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-12-15 09:01:09,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:09,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122874385] [2021-12-15 09:01:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122874385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:09,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:09,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196385682] [2021-12-15 09:01:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:09,885 INFO L87 Difference]: Start difference. First operand 3472 states and 5179 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:09,976 INFO L93 Difference]: Finished difference Result 7404 states and 11064 transitions. [2021-12-15 09:01:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-12-15 09:01:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:09,981 INFO L225 Difference]: With dead ends: 7404 [2021-12-15 09:01:09,981 INFO L226 Difference]: Without dead ends: 3955 [2021-12-15 09:01:09,984 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 09:01:09,984 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:09,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 581 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:01:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-12-15 09:01:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3955. [2021-12-15 09:01:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3955 states, 3954 states have (on average 1.4916540212443095) internal successors, (5898), 3954 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3955 states to 3955 states and 5898 transitions. [2021-12-15 09:01:10,059 INFO L78 Accepts]: Start accepts. Automaton has 3955 states and 5898 transitions. Word has length 270 [2021-12-15 09:01:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:10,059 INFO L470 AbstractCegarLoop]: Abstraction has 3955 states and 5898 transitions. [2021-12-15 09:01:10,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3955 states and 5898 transitions. [2021-12-15 09:01:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-15 09:01:10,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:10,065 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:10,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-15 09:01:10,065 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash 629249556, now seen corresponding path program 1 times [2021-12-15 09:01:10,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:10,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299980179] [2021-12-15 09:01:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:10,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-15 09:01:10,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:10,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299980179] [2021-12-15 09:01:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299980179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:10,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:10,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:10,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667725185] [2021-12-15 09:01:10,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:10,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:10,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:10,209 INFO L87 Difference]: Start difference. First operand 3955 states and 5898 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:10,288 INFO L93 Difference]: Finished difference Result 8343 states and 12462 transitions. [2021-12-15 09:01:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 270 [2021-12-15 09:01:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:10,295 INFO L225 Difference]: With dead ends: 8343 [2021-12-15 09:01:10,295 INFO L226 Difference]: Without dead ends: 4411 [2021-12-15 09:01:10,299 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 09:01:10,299 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:10,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 584 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-12-15 09:01:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 4411. [2021-12-15 09:01:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4410 states have (on average 1.4909297052154196) internal successors, (6575), 4410 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 6575 transitions. [2021-12-15 09:01:10,384 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 6575 transitions. Word has length 270 [2021-12-15 09:01:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:10,385 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 6575 transitions. [2021-12-15 09:01:10,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 6575 transitions. [2021-12-15 09:01:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-15 09:01:10,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:10,391 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-15 09:01:10,395 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -921631286, now seen corresponding path program 1 times [2021-12-15 09:01:10,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:10,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638365890] [2021-12-15 09:01:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:10,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:01:10,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638365890] [2021-12-15 09:01:10,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638365890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:10,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:10,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:10,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422713772] [2021-12-15 09:01:10,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:10,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:10,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:10,571 INFO L87 Difference]: Start difference. First operand 4411 states and 6575 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:10,653 INFO L93 Difference]: Finished difference Result 9288 states and 13865 transitions. [2021-12-15 09:01:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 344 [2021-12-15 09:01:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:10,661 INFO L225 Difference]: With dead ends: 9288 [2021-12-15 09:01:10,661 INFO L226 Difference]: Without dead ends: 4900 [2021-12-15 09:01:10,666 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 09:01:10,667 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:10,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 375 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:10,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-12-15 09:01:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4900. [2021-12-15 09:01:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4899 states have (on average 1.4925494998979383) internal successors, (7312), 4899 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 7312 transitions. [2021-12-15 09:01:10,775 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 7312 transitions. Word has length 344 [2021-12-15 09:01:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:10,775 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 7312 transitions. [2021-12-15 09:01:10,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 7312 transitions. [2021-12-15 09:01:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-15 09:01:10,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:10,783 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:10,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-15 09:01:10,783 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1059226357, now seen corresponding path program 1 times [2021-12-15 09:01:10,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:10,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789251439] [2021-12-15 09:01:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:10,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2021-12-15 09:01:10,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789251439] [2021-12-15 09:01:10,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789251439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:10,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:10,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:10,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589066299] [2021-12-15 09:01:10,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:10,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:10,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:10,946 INFO L87 Difference]: Start difference. First operand 4900 states and 7312 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:11,059 INFO L93 Difference]: Finished difference Result 10266 states and 15339 transitions. [2021-12-15 09:01:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 385 [2021-12-15 09:01:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:11,068 INFO L225 Difference]: With dead ends: 10266 [2021-12-15 09:01:11,068 INFO L226 Difference]: Without dead ends: 5389 [2021-12-15 09:01:11,072 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 09:01:11,073 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:11,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 374 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2021-12-15 09:01:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 5389. [2021-12-15 09:01:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5389 states, 5388 states have (on average 1.494060876020787) internal successors, (8050), 5388 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5389 states to 5389 states and 8050 transitions. [2021-12-15 09:01:11,147 INFO L78 Accepts]: Start accepts. Automaton has 5389 states and 8050 transitions. Word has length 385 [2021-12-15 09:01:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:11,147 INFO L470 AbstractCegarLoop]: Abstraction has 5389 states and 8050 transitions. [2021-12-15 09:01:11,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5389 states and 8050 transitions. [2021-12-15 09:01:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-15 09:01:11,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:11,155 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:11,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-15 09:01:11,155 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -720784750, now seen corresponding path program 1 times [2021-12-15 09:01:11,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777344711] [2021-12-15 09:01:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:11,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-15 09:01:11,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:11,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777344711] [2021-12-15 09:01:11,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777344711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:11,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:11,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:11,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151150240] [2021-12-15 09:01:11,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:11,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:11,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:11,294 INFO L87 Difference]: Start difference. First operand 5389 states and 8050 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:11,424 INFO L93 Difference]: Finished difference Result 11239 states and 16808 transitions. [2021-12-15 09:01:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 393 [2021-12-15 09:01:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:11,432 INFO L225 Difference]: With dead ends: 11239 [2021-12-15 09:01:11,433 INFO L226 Difference]: Without dead ends: 5873 [2021-12-15 09:01:11,437 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 09:01:11,438 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:11,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 581 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:01:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2021-12-15 09:01:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5873. [2021-12-15 09:01:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 1.4935286103542234) internal successors, (8770), 5872 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 8770 transitions. [2021-12-15 09:01:11,518 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 8770 transitions. Word has length 393 [2021-12-15 09:01:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:11,519 INFO L470 AbstractCegarLoop]: Abstraction has 5873 states and 8770 transitions. [2021-12-15 09:01:11,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 8770 transitions. [2021-12-15 09:01:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-15 09:01:11,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:11,527 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:11,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-15 09:01:11,528 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 723199624, now seen corresponding path program 1 times [2021-12-15 09:01:11,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:11,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086425972] [2021-12-15 09:01:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:11,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2021-12-15 09:01:11,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086425972] [2021-12-15 09:01:11,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086425972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:11,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:11,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:11,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131017762] [2021-12-15 09:01:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:11,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:11,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:11,687 INFO L87 Difference]: Start difference. First operand 5873 states and 8770 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:11,809 INFO L93 Difference]: Finished difference Result 12212 states and 18255 transitions. [2021-12-15 09:01:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 468 [2021-12-15 09:01:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:11,818 INFO L225 Difference]: With dead ends: 12212 [2021-12-15 09:01:11,818 INFO L226 Difference]: Without dead ends: 6362 [2021-12-15 09:01:11,824 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 09:01:11,824 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 156 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:11,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 372 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:01:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2021-12-15 09:01:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 6362. [2021-12-15 09:01:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6362 states, 6361 states have (on average 1.4950479484357806) internal successors, (9510), 6361 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6362 states to 6362 states and 9510 transitions. [2021-12-15 09:01:11,916 INFO L78 Accepts]: Start accepts. Automaton has 6362 states and 9510 transitions. Word has length 468 [2021-12-15 09:01:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 6362 states and 9510 transitions. [2021-12-15 09:01:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6362 states and 9510 transitions. [2021-12-15 09:01:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-12-15 09:01:11,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:11,927 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:11,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-15 09:01:11,927 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1026052222, now seen corresponding path program 1 times [2021-12-15 09:01:11,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269504968] [2021-12-15 09:01:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:11,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 702 proven. 0 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-12-15 09:01:12,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:12,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269504968] [2021-12-15 09:01:12,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269504968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:12,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:12,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:01:12,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282299735] [2021-12-15 09:01:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:12,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:01:12,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:01:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:01:12,148 INFO L87 Difference]: Start difference. First operand 6362 states and 9510 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:12,256 INFO L93 Difference]: Finished difference Result 6853 states and 10253 transitions. [2021-12-15 09:01:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:01:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 510 [2021-12-15 09:01:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:12,265 INFO L225 Difference]: With dead ends: 6853 [2021-12-15 09:01:12,266 INFO L226 Difference]: Without dead ends: 6851 [2021-12-15 09:01:12,268 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 09:01:12,270 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:12,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 371 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:01:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-12-15 09:01:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 6851. [2021-12-15 09:01:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6851 states, 6850 states have (on average 1.4964963503649635) internal successors, (10251), 6850 states have internal predecessors, (10251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6851 states to 6851 states and 10251 transitions. [2021-12-15 09:01:12,396 INFO L78 Accepts]: Start accepts. Automaton has 6851 states and 10251 transitions. Word has length 510 [2021-12-15 09:01:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:12,397 INFO L470 AbstractCegarLoop]: Abstraction has 6851 states and 10251 transitions. [2021-12-15 09:01:12,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6851 states and 10251 transitions. [2021-12-15 09:01:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-15 09:01:12,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:12,411 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-15 09:01:12,411 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1317172119, now seen corresponding path program 1 times [2021-12-15 09:01:12,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620173545] [2021-12-15 09:01:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:12,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-12-15 09:01:12,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620173545] [2021-12-15 09:01:12,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620173545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:12,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:12,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:12,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20939055] [2021-12-15 09:01:12,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:12,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:12,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:12,609 INFO L87 Difference]: Start difference. First operand 6851 states and 10251 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:14,619 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 09:01:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:14,955 INFO L93 Difference]: Finished difference Result 14855 states and 22155 transitions. [2021-12-15 09:01:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 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 519 [2021-12-15 09:01:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:14,966 INFO L225 Difference]: With dead ends: 14855 [2021-12-15 09:01:14,966 INFO L226 Difference]: Without dead ends: 8027 [2021-12-15 09:01:14,974 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 09:01:14,974 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 65 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 673 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:01:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-12-15 09:01:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7425. [2021-12-15 09:01:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 7424 states have (on average 1.4995959051724137) internal successors, (11133), 7424 states have internal predecessors, (11133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 11133 transitions. [2021-12-15 09:01:15,112 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 11133 transitions. Word has length 519 [2021-12-15 09:01:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:15,113 INFO L470 AbstractCegarLoop]: Abstraction has 7425 states and 11133 transitions. [2021-12-15 09:01:15,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 11133 transitions. [2021-12-15 09:01:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-15 09:01:15,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:15,126 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-15 09:01:15,127 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1566627227, now seen corresponding path program 1 times [2021-12-15 09:01:15,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354811766] [2021-12-15 09:01:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1409 proven. 81 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2021-12-15 09:01:15,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:15,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354811766] [2021-12-15 09:01:15,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354811766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:01:15,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630570868] [2021-12-15 09:01:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:15,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:01:15,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:01:15,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:01:15,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:01:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-15 09:01:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:01:16,770 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 09:01:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-15 09:01:16,861 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-15 09:01:16,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-15 09:01:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-15 09:01:17,235 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-15 09:01:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-15 09:01:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 09:01:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 09:01:17,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-15 09:01:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-15 09:01:17,396 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-12-15 09:01:17,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 77 [2021-12-15 09:01:17,488 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-12-15 09:01:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 49 [2021-12-15 09:01:17,717 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-15 09:01:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2021-12-15 09:01:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1454 proven. 212 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-12-15 09:01:17,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:01:18,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 53 [2021-12-15 09:01:18,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-12-15 09:01:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2021-12-15 09:01:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630570868] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:01:20,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:01:20,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 14] total 21 [2021-12-15 09:01:20,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780212733] [2021-12-15 09:01:20,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:20,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 09:01:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 09:01:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-15 09:01:20,410 INFO L87 Difference]: Start difference. First operand 7425 states and 11133 transitions. Second operand has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:22,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:01:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:27,879 INFO L93 Difference]: Finished difference Result 21682 states and 32459 transitions. [2021-12-15 09:01:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 09:01:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 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 519 [2021-12-15 09:01:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:27,896 INFO L225 Difference]: With dead ends: 21682 [2021-12-15 09:01:27,896 INFO L226 Difference]: Without dead ends: 14280 [2021-12-15 09:01:27,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1027 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-15 09:01:27,904 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 433 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 945 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 537 Invalid, 0 Unknown, 190 Unchecked, 3.1s Time] [2021-12-15 09:01:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14280 states. [2021-12-15 09:01:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14280 to 12192. [2021-12-15 09:01:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12192 states, 12191 states have (on average 1.5118530063161348) internal successors, (18431), 12191 states have internal predecessors, (18431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12192 states to 12192 states and 18431 transitions. [2021-12-15 09:01:28,087 INFO L78 Accepts]: Start accepts. Automaton has 12192 states and 18431 transitions. Word has length 519 [2021-12-15 09:01:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 12192 states and 18431 transitions. [2021-12-15 09:01:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12192 states and 18431 transitions. [2021-12-15 09:01:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-15 09:01:28,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:28,100 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:28,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:01:28,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-15 09:01:28,301 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash 733561204, now seen corresponding path program 1 times [2021-12-15 09:01:28,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:28,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178472271] [2021-12-15 09:01:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:28,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2530 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2021-12-15 09:01:28,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178472271] [2021-12-15 09:01:28,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178472271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:28,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:28,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:28,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804979424] [2021-12-15 09:01:28,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:28,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:28,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:28,492 INFO L87 Difference]: Start difference. First operand 12192 states and 18431 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:30,498 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 09:01:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:30,920 INFO L93 Difference]: Finished difference Result 25352 states and 38154 transitions. [2021-12-15 09:01:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2021-12-15 09:01:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:30,936 INFO L225 Difference]: With dead ends: 25352 [2021-12-15 09:01:30,936 INFO L226 Difference]: Without dead ends: 13127 [2021-12-15 09:01:30,946 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 09:01:30,947 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 64 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:30,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 671 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:01:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-12-15 09:01:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12150. [2021-12-15 09:01:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12150 states, 12149 states have (on average 1.5114001152358219) internal successors, (18362), 12149 states have internal predecessors, (18362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12150 states to 12150 states and 18362 transitions. [2021-12-15 09:01:31,197 INFO L78 Accepts]: Start accepts. Automaton has 12150 states and 18362 transitions. Word has length 520 [2021-12-15 09:01:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:31,197 INFO L470 AbstractCegarLoop]: Abstraction has 12150 states and 18362 transitions. [2021-12-15 09:01:31,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12150 states and 18362 transitions. [2021-12-15 09:01:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-12-15 09:01:31,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:31,210 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:31,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-15 09:01:31,210 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1494876250, now seen corresponding path program 1 times [2021-12-15 09:01:31,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:31,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414667608] [2021-12-15 09:01:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:31,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2660 backedges. 1109 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-12-15 09:01:31,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:31,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414667608] [2021-12-15 09:01:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414667608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:01:31,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:01:31,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:01:31,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870621279] [2021-12-15 09:01:31,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:01:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:01:31,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:01:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:01:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:01:31,409 INFO L87 Difference]: Start difference. First operand 12150 states and 18362 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:01:32,269 INFO L93 Difference]: Finished difference Result 25114 states and 37834 transitions. [2021-12-15 09:01:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:01:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 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 536 [2021-12-15 09:01:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:01:32,286 INFO L225 Difference]: With dead ends: 25114 [2021-12-15 09:01:32,286 INFO L226 Difference]: Without dead ends: 12987 [2021-12-15 09:01:32,296 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 09:01:32,297 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 79 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:01:32,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 657 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:01:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-12-15 09:01:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12150. [2021-12-15 09:01:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12150 states, 12149 states have (on average 1.5091777100995967) internal successors, (18335), 12149 states have internal predecessors, (18335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12150 states to 12150 states and 18335 transitions. [2021-12-15 09:01:32,565 INFO L78 Accepts]: Start accepts. Automaton has 12150 states and 18335 transitions. Word has length 536 [2021-12-15 09:01:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:01:32,566 INFO L470 AbstractCegarLoop]: Abstraction has 12150 states and 18335 transitions. [2021-12-15 09:01:32,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:01:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12150 states and 18335 transitions. [2021-12-15 09:01:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-12-15 09:01:32,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:01:32,580 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:01:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-15 09:01:32,580 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:01:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:01:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1332503124, now seen corresponding path program 1 times [2021-12-15 09:01:32,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:01:32,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848690241] [2021-12-15 09:01:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:32,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:01:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:01:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1225 proven. 187 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-12-15 09:01:32,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:01:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848690241] [2021-12-15 09:01:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848690241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:01:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51673946] [2021-12-15 09:01:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:01:32,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:01:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:01:32,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:01:32,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process