./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.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 ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:10:11,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:10:11,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:10:11,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:10:11,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:10:11,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:10:11,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:10:11,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:10:11,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:10:11,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:10:11,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:10:11,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:10:11,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:10:11,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:10:11,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:10:11,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:10:11,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:10:11,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:10:11,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:10:11,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:10:11,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:10:11,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:10:11,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:10:11,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:10:11,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:10:11,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:10:11,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:10:11,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:10:11,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:10:11,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:10:11,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:10:11,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:10:11,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:10:11,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:10:11,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:10:11,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:10:11,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:10:11,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:10:11,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:10:11,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:10:11,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:10:11,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:10:11,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:10:11,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:10:11,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:10:11,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:10:11,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:10:11,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:10:11,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:10:11,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:10:11,160 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:10:11,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:10:11,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:10:11,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:10:11,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:10:11,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:10:11,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:10:11,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:10:11,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:10:11,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:10:11,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:10:11,164 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:10:11,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:10:11,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:10:11,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab4ce27c037a23a1acb050e4e5e47861985f2a45717e88488eff45dc32b3cf64 [2021-12-28 01:10:11,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:10:11,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:10:11,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:10:11,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:10:11,488 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:10:11,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:10:11,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e238ce7/b4d083d970d24469bb3200a01598dc8d/FLAG28664e744 [2021-12-28 01:10:11,978 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:10:11,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:10:11,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e238ce7/b4d083d970d24469bb3200a01598dc8d/FLAG28664e744 [2021-12-28 01:10:12,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e238ce7/b4d083d970d24469bb3200a01598dc8d [2021-12-28 01:10:12,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:10:12,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:10:12,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:10:12,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:10:12,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:10:12,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b15bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12, skipping insertion in model container [2021-12-28 01:10:12,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:10:12,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:10:12,245 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/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-12-28 01:10:12,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:10:12,261 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:10:12,315 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/seq-mthreaded/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c[12667,12680] [2021-12-28 01:10:12,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:10:12,338 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:10:12,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12 WrapperNode [2021-12-28 01:10:12,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:10:12,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:10:12,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:10:12,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:10:12,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,372 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 382 [2021-12-28 01:10:12,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:10:12,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:10:12,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:10:12,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:10:12,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:10:12,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:10:12,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:10:12,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:10:12,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (1/1) ... [2021-12-28 01:10:12,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:10:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:10:12,449 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) [2021-12-28 01:10:12,481 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 [2021-12-28 01:10:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:10:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:10:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:10:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:10:12,605 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:10:12,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:10:12,986 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:10:12,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:10:12,995 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:10:12,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:10:12 BoogieIcfgContainer [2021-12-28 01:10:12,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:10:12,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:10:12,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:10:13,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:10:13,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:10:12" (1/3) ... [2021-12-28 01:10:13,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0995e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:10:13, skipping insertion in model container [2021-12-28 01:10:13,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:10:12" (2/3) ... [2021-12-28 01:10:13,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d0995e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:10:13, skipping insertion in model container [2021-12-28 01:10:13,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:10:12" (3/3) ... [2021-12-28 01:10:13,002 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:10:13,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:10:13,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:10:13,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:10:13,049 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 [2021-12-28 01:10:13,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:10:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 01:10:13,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,071 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] [2021-12-28 01:10:13,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1732857806, now seen corresponding path program 1 times [2021-12-28 01:10:13,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168947588] [2021-12-28 01:10:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168947588] [2021-12-28 01:10:13,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168947588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:10:13,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106671881] [2021-12-28 01:10:13,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:10:13,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:10:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:10:13,263 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.7058823529411764) internal successors, (203), 120 states have internal predecessors, (203), 0 states have call successors, (0), 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 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,294 INFO L93 Difference]: Finished difference Result 201 states and 333 transitions. [2021-12-28 01:10:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:10:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-28 01:10:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,303 INFO L225 Difference]: With dead ends: 201 [2021-12-28 01:10:13,303 INFO L226 Difference]: Without dead ends: 117 [2021-12-28 01:10:13,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:10:13,308 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-28 01:10:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-28 01:10:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 116 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) [2021-12-28 01:10:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 196 transitions. [2021-12-28 01:10:13,350 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 196 transitions. Word has length 33 [2021-12-28 01:10:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,354 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 196 transitions. [2021-12-28 01:10:13,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 196 transitions. [2021-12-28 01:10:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 01:10:13,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,358 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] [2021-12-28 01:10:13,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:10:13,359 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2052636400, now seen corresponding path program 1 times [2021-12-28 01:10:13,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351091246] [2021-12-28 01:10:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351091246] [2021-12-28 01:10:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351091246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:10:13,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715637087] [2021-12-28 01:10:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:10:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:10:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:10:13,472 INFO L87 Difference]: Start difference. First operand 117 states and 196 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,557 INFO L93 Difference]: Finished difference Result 200 states and 326 transitions. [2021-12-28 01:10:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:10:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-28 01:10:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,560 INFO L225 Difference]: With dead ends: 200 [2021-12-28 01:10:13,560 INFO L226 Difference]: Without dead ends: 117 [2021-12-28 01:10:13,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:13,562 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 3 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 741 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-28 01:10:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-28 01:10:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4137931034482758) internal successors, (164), 116 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-12-28 01:10:13,573 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 33 [2021-12-28 01:10:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,573 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-12-28 01:10:13,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-12-28 01:10:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 01:10:13,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:13,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:10:13,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 148306117, now seen corresponding path program 1 times [2021-12-28 01:10:13,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342548465] [2021-12-28 01:10:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342548465] [2021-12-28 01:10:13,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342548465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:13,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360743122] [2021-12-28 01:10:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:13,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:13,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:13,635 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,649 INFO L93 Difference]: Finished difference Result 263 states and 396 transitions. [2021-12-28 01:10:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-28 01:10:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,650 INFO L225 Difference]: With dead ends: 263 [2021-12-28 01:10:13,651 INFO L226 Difference]: Without dead ends: 184 [2021-12-28 01:10:13,651 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 [2021-12-28 01:10:13,652 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 110 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 366 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-28 01:10:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-12-28 01:10:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 181 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2021-12-28 01:10:13,664 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 64 [2021-12-28 01:10:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,664 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2021-12-28 01:10:13,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2021-12-28 01:10:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 01:10:13,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:13,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:10:13,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1747202786, now seen corresponding path program 1 times [2021-12-28 01:10:13,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330781461] [2021-12-28 01:10:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330781461] [2021-12-28 01:10:13,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330781461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676908765] [2021-12-28 01:10:13,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:13,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:13,722 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,740 INFO L93 Difference]: Finished difference Result 446 states and 688 transitions. [2021-12-28 01:10:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-28 01:10:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,743 INFO L225 Difference]: With dead ends: 446 [2021-12-28 01:10:13,743 INFO L226 Difference]: Without dead ends: 302 [2021-12-28 01:10:13,743 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 [2021-12-28 01:10:13,744 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 105 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-28 01:10:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2021-12-28 01:10:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.5217391304347827) internal successors, (455), 299 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 455 transitions. [2021-12-28 01:10:13,756 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 455 transitions. Word has length 65 [2021-12-28 01:10:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,756 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 455 transitions. [2021-12-28 01:10:13,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 455 transitions. [2021-12-28 01:10:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 01:10:13,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:13,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:10:13,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 378408053, now seen corresponding path program 1 times [2021-12-28 01:10:13,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675277876] [2021-12-28 01:10:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675277876] [2021-12-28 01:10:13,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675277876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:13,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292144758] [2021-12-28 01:10:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:13,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:13,800 INFO L87 Difference]: Start difference. First operand 300 states and 455 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,816 INFO L93 Difference]: Finished difference Result 776 states and 1209 transitions. [2021-12-28 01:10:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-28 01:10:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,819 INFO L225 Difference]: With dead ends: 776 [2021-12-28 01:10:13,819 INFO L226 Difference]: Without dead ends: 514 [2021-12-28 01:10:13,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:13,820 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 100 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 348 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-28 01:10:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-12-28 01:10:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.5401174168297456) internal successors, (787), 511 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 787 transitions. [2021-12-28 01:10:13,835 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 787 transitions. Word has length 66 [2021-12-28 01:10:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,836 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 787 transitions. [2021-12-28 01:10:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 787 transitions. [2021-12-28 01:10:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:10:13,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:13,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:10:13,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1350891378, now seen corresponding path program 1 times [2021-12-28 01:10:13,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005157767] [2021-12-28 01:10:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005157767] [2021-12-28 01:10:13,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005157767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:13,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982422461] [2021-12-28 01:10:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:13,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:13,881 INFO L87 Difference]: Start difference. First operand 512 states and 787 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:13,905 INFO L93 Difference]: Finished difference Result 1364 states and 2125 transitions. [2021-12-28 01:10:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-28 01:10:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:13,909 INFO L225 Difference]: With dead ends: 1364 [2021-12-28 01:10:13,909 INFO L226 Difference]: Without dead ends: 890 [2021-12-28 01:10:13,910 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 [2021-12-28 01:10:13,911 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 95 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:13,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 339 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-28 01:10:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2021-12-28 01:10:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.5411499436302143) internal successors, (1367), 887 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1367 transitions. [2021-12-28 01:10:13,935 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1367 transitions. Word has length 67 [2021-12-28 01:10:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1367 transitions. [2021-12-28 01:10:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1367 transitions. [2021-12-28 01:10:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:10:13,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:13,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:13,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:10:13,938 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash 644065317, now seen corresponding path program 1 times [2021-12-28 01:10:13,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:13,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208163970] [2021-12-28 01:10:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:13,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:13,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:13,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208163970] [2021-12-28 01:10:13,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208163970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:13,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:13,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:10:13,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472867680] [2021-12-28 01:10:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:13,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:10:13,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:10:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:13,996 INFO L87 Difference]: Start difference. First operand 888 states and 1367 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:14,253 INFO L93 Difference]: Finished difference Result 5988 states and 9341 transitions. [2021-12-28 01:10:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:10:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-28 01:10:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:14,268 INFO L225 Difference]: With dead ends: 5988 [2021-12-28 01:10:14,269 INFO L226 Difference]: Without dead ends: 5138 [2021-12-28 01:10:14,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:10:14,271 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1193 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:14,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1816 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2021-12-28 01:10:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 1736. [2021-12-28 01:10:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 1.534870317002882) internal successors, (2663), 1735 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2663 transitions. [2021-12-28 01:10:14,362 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2663 transitions. Word has length 68 [2021-12-28 01:10:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:14,363 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 2663 transitions. [2021-12-28 01:10:14,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2663 transitions. [2021-12-28 01:10:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 01:10:14,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:14,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:14,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:10:14,365 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1892134872, now seen corresponding path program 1 times [2021-12-28 01:10:14,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:14,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049654318] [2021-12-28 01:10:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:14,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:14,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:14,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049654318] [2021-12-28 01:10:14,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049654318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:14,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:14,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:10:14,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934664065] [2021-12-28 01:10:14,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:14,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:10:14,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:10:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:14,451 INFO L87 Difference]: Start difference. First operand 1736 states and 2663 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:14,870 INFO L93 Difference]: Finished difference Result 9394 states and 14348 transitions. [2021-12-28 01:10:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:10:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-28 01:10:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:14,890 INFO L225 Difference]: With dead ends: 9394 [2021-12-28 01:10:14,890 INFO L226 Difference]: Without dead ends: 7696 [2021-12-28 01:10:14,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:14,894 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 670 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:14,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 775 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7696 states. [2021-12-28 01:10:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7696 to 7688. [2021-12-28 01:10:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 1.5203590477429427) internal successors, (11687), 7687 states have internal predecessors, (11687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 11687 transitions. [2021-12-28 01:10:15,262 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 11687 transitions. Word has length 69 [2021-12-28 01:10:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 7688 states and 11687 transitions. [2021-12-28 01:10:15,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 11687 transitions. [2021-12-28 01:10:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-28 01:10:15,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:15,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:15,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:10:15,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1491011308, now seen corresponding path program 1 times [2021-12-28 01:10:15,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:15,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306994966] [2021-12-28 01:10:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:15,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:15,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:15,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306994966] [2021-12-28 01:10:15,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306994966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:15,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:15,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:10:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349510401] [2021-12-28 01:10:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:10:15,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:10:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:10:15,316 INFO L87 Difference]: Start difference. First operand 7688 states and 11687 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:15,976 INFO L93 Difference]: Finished difference Result 15978 states and 23976 transitions. [2021-12-28 01:10:15,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:10:15,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-28 01:10:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:16,014 INFO L225 Difference]: With dead ends: 15978 [2021-12-28 01:10:16,015 INFO L226 Difference]: Without dead ends: 15976 [2021-12-28 01:10:16,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:10:16,019 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 357 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:16,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 729 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15976 states. [2021-12-28 01:10:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15976 to 8168. [2021-12-28 01:10:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8167 states have (on average 1.4897759275131628) internal successors, (12167), 8167 states have internal predecessors, (12167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 12167 transitions. [2021-12-28 01:10:16,496 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 12167 transitions. Word has length 70 [2021-12-28 01:10:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:16,496 INFO L470 AbstractCegarLoop]: Abstraction has 8168 states and 12167 transitions. [2021-12-28 01:10:16,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 12167 transitions. [2021-12-28 01:10:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:10:16,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:16,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:10:16,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1075868401, now seen corresponding path program 1 times [2021-12-28 01:10:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:16,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874112765] [2021-12-28 01:10:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:16,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:16,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874112765] [2021-12-28 01:10:16,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874112765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:16,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:16,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:16,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540368137] [2021-12-28 01:10:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:16,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:16,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:16,542 INFO L87 Difference]: Start difference. First operand 8168 states and 12167 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:17,143 INFO L93 Difference]: Finished difference Result 22556 states and 33449 transitions. [2021-12-28 01:10:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-28 01:10:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:17,164 INFO L225 Difference]: With dead ends: 22556 [2021-12-28 01:10:17,164 INFO L226 Difference]: Without dead ends: 14426 [2021-12-28 01:10:17,171 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 [2021-12-28 01:10:17,171 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 85 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:17,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 285 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14426 states. [2021-12-28 01:10:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14426 to 14280. [2021-12-28 01:10:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14280 states, 14279 states have (on average 1.462777505427551) internal successors, (20887), 14279 states have internal predecessors, (20887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14280 states to 14280 states and 20887 transitions. [2021-12-28 01:10:17,742 INFO L78 Accepts]: Start accepts. Automaton has 14280 states and 20887 transitions. Word has length 71 [2021-12-28 01:10:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:17,743 INFO L470 AbstractCegarLoop]: Abstraction has 14280 states and 20887 transitions. [2021-12-28 01:10:17,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14280 states and 20887 transitions. [2021-12-28 01:10:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:10:17,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:17,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:10:17,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:10:17,745 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1119250846, now seen corresponding path program 1 times [2021-12-28 01:10:17,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:17,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798477747] [2021-12-28 01:10:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:17,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:17,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798477747] [2021-12-28 01:10:17,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798477747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:17,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:17,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:17,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407277147] [2021-12-28 01:10:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:17,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:17,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:17,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:17,782 INFO L87 Difference]: Start difference. First operand 14280 states and 20887 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:18,811 INFO L93 Difference]: Finished difference Result 28783 states and 42269 transitions. [2021-12-28 01:10:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-28 01:10:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:18,849 INFO L225 Difference]: With dead ends: 28783 [2021-12-28 01:10:18,849 INFO L226 Difference]: Without dead ends: 20652 [2021-12-28 01:10:18,856 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 [2021-12-28 01:10:18,857 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:18,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 387 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20652 states. [2021-12-28 01:10:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20652 to 20650. [2021-12-28 01:10:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20650 states, 20649 states have (on average 1.4517410044069932) internal successors, (29977), 20649 states have internal predecessors, (29977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29977 transitions. [2021-12-28 01:10:19,746 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29977 transitions. Word has length 72 [2021-12-28 01:10:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:19,746 INFO L470 AbstractCegarLoop]: Abstraction has 20650 states and 29977 transitions. [2021-12-28 01:10:19,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29977 transitions. [2021-12-28 01:10:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:19,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:19,763 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:19,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:10:19,764 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1256319803, now seen corresponding path program 1 times [2021-12-28 01:10:19,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:19,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150161031] [2021-12-28 01:10:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:19,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:19,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150161031] [2021-12-28 01:10:19,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150161031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:19,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196265464] [2021-12-28 01:10:19,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:19,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:19,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:19,825 INFO L87 Difference]: Start difference. First operand 20650 states and 29977 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:21,288 INFO L93 Difference]: Finished difference Result 51965 states and 75309 transitions. [2021-12-28 01:10:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-28 01:10:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:21,341 INFO L225 Difference]: With dead ends: 51965 [2021-12-28 01:10:21,341 INFO L226 Difference]: Without dead ends: 34683 [2021-12-28 01:10:21,361 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 [2021-12-28 01:10:21,362 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:21,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 325 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34683 states. [2021-12-28 01:10:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34683 to 33297. [2021-12-28 01:10:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33297 states, 33296 states have (on average 1.4366590581451226) internal successors, (47835), 33296 states have internal predecessors, (47835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33297 states to 33297 states and 47835 transitions. [2021-12-28 01:10:23,079 INFO L78 Accepts]: Start accepts. Automaton has 33297 states and 47835 transitions. Word has length 99 [2021-12-28 01:10:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 33297 states and 47835 transitions. [2021-12-28 01:10:23,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33297 states and 47835 transitions. [2021-12-28 01:10:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:23,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:23,093 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:10:23,093 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1278390955, now seen corresponding path program 1 times [2021-12-28 01:10:23,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:23,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488081653] [2021-12-28 01:10:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:23,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:10:23,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:23,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488081653] [2021-12-28 01:10:23,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488081653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:23,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:23,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:10:23,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869830262] [2021-12-28 01:10:23,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:23,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:10:23,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:23,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:10:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:23,145 INFO L87 Difference]: Start difference. First operand 33297 states and 47835 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:26,049 INFO L93 Difference]: Finished difference Result 82133 states and 119169 transitions. [2021-12-28 01:10:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:10:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-28 01:10:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:26,165 INFO L225 Difference]: With dead ends: 82133 [2021-12-28 01:10:26,166 INFO L226 Difference]: Without dead ends: 69243 [2021-12-28 01:10:26,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:10:26,200 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1071 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:26,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 1209 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69243 states. [2021-12-28 01:10:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69243 to 45897. [2021-12-28 01:10:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45897 states, 45896 states have (on average 1.4365304165940387) internal successors, (65931), 45896 states have internal predecessors, (65931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45897 states to 45897 states and 65931 transitions. [2021-12-28 01:10:29,162 INFO L78 Accepts]: Start accepts. Automaton has 45897 states and 65931 transitions. Word has length 99 [2021-12-28 01:10:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:29,162 INFO L470 AbstractCegarLoop]: Abstraction has 45897 states and 65931 transitions. [2021-12-28 01:10:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 45897 states and 65931 transitions. [2021-12-28 01:10:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:29,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:29,177 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:29,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:10:29,177 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:29,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1536118245, now seen corresponding path program 1 times [2021-12-28 01:10:29,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:29,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743408838] [2021-12-28 01:10:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:29,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743408838] [2021-12-28 01:10:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743408838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:29,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:29,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:29,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570619554] [2021-12-28 01:10:29,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:29,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:29,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:29,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:29,252 INFO L87 Difference]: Start difference. First operand 45897 states and 65931 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:32,218 INFO L93 Difference]: Finished difference Result 91107 states and 130738 transitions. [2021-12-28 01:10:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:32,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-28 01:10:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:32,309 INFO L225 Difference]: With dead ends: 91107 [2021-12-28 01:10:32,310 INFO L226 Difference]: Without dead ends: 65137 [2021-12-28 01:10:32,334 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 [2021-12-28 01:10:32,336 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 87 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 351 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65137 states. [2021-12-28 01:10:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65137 to 59867. [2021-12-28 01:10:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59867 states, 59866 states have (on average 1.4217084822770856) internal successors, (85112), 59866 states have internal predecessors, (85112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59867 states to 59867 states and 85112 transitions. [2021-12-28 01:10:35,847 INFO L78 Accepts]: Start accepts. Automaton has 59867 states and 85112 transitions. Word has length 99 [2021-12-28 01:10:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:35,847 INFO L470 AbstractCegarLoop]: Abstraction has 59867 states and 85112 transitions. [2021-12-28 01:10:35,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59867 states and 85112 transitions. [2021-12-28 01:10:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:35,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:35,864 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:35,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:10:35,864 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1963464309, now seen corresponding path program 1 times [2021-12-28 01:10:35,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231667100] [2021-12-28 01:10:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:35,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:10:35,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231667100] [2021-12-28 01:10:35,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231667100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:35,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:10:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789958332] [2021-12-28 01:10:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:35,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:10:35,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:10:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:10:35,906 INFO L87 Difference]: Start difference. First operand 59867 states and 85112 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:39,387 INFO L93 Difference]: Finished difference Result 95012 states and 134424 transitions. [2021-12-28 01:10:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:10:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-28 01:10:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:39,487 INFO L225 Difference]: With dead ends: 95012 [2021-12-28 01:10:39,487 INFO L226 Difference]: Without dead ends: 63682 [2021-12-28 01:10:39,515 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 [2021-12-28 01:10:39,516 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 88 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:39,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 367 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:10:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63682 states. [2021-12-28 01:10:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63682 to 60732. [2021-12-28 01:10:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60732 states, 60731 states have (on average 1.3985773328283744) internal successors, (84937), 60731 states have internal predecessors, (84937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60732 states to 60732 states and 84937 transitions. [2021-12-28 01:10:42,903 INFO L78 Accepts]: Start accepts. Automaton has 60732 states and 84937 transitions. Word has length 99 [2021-12-28 01:10:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:42,903 INFO L470 AbstractCegarLoop]: Abstraction has 60732 states and 84937 transitions. [2021-12-28 01:10:42,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 60732 states and 84937 transitions. [2021-12-28 01:10:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:42,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:42,917 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:42,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:10:42,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash 429145653, now seen corresponding path program 1 times [2021-12-28 01:10:42,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150468128] [2021-12-28 01:10:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:42,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:10:42,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150468128] [2021-12-28 01:10:42,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150468128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:42,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:42,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:10:42,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649035514] [2021-12-28 01:10:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:10:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:10:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:42,972 INFO L87 Difference]: Start difference. First operand 60732 states and 84937 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2021-12-28 01:10:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:10:48,272 INFO L93 Difference]: Finished difference Result 117878 states and 166778 transitions. [2021-12-28 01:10:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:10:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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 99 [2021-12-28 01:10:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:10:48,454 INFO L225 Difference]: With dead ends: 117878 [2021-12-28 01:10:48,454 INFO L226 Difference]: Without dead ends: 109236 [2021-12-28 01:10:48,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:10:48,481 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1158 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:10:48,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 1153 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:10:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109236 states. [2021-12-28 01:10:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109236 to 69180. [2021-12-28 01:10:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69180 states, 69179 states have (on average 1.4003237976842684) internal successors, (96873), 69179 states have internal predecessors, (96873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:10:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69180 states to 69180 states and 96873 transitions. [2021-12-28 01:10:52,722 INFO L78 Accepts]: Start accepts. Automaton has 69180 states and 96873 transitions. Word has length 99 [2021-12-28 01:10:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:10:52,723 INFO L470 AbstractCegarLoop]: Abstraction has 69180 states and 96873 transitions. [2021-12-28 01:10:52,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2021-12-28 01:10:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 69180 states and 96873 transitions. [2021-12-28 01:10:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 01:10:52,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:10:52,738 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:10:52,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:10:52,738 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:10:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:10:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2036705921, now seen corresponding path program 1 times [2021-12-28 01:10:52,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:10:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456168079] [2021-12-28 01:10:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:10:52,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:10:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:10:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 01:10:52,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:10:52,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456168079] [2021-12-28 01:10:52,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456168079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:10:52,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:10:52,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:10:52,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395322327] [2021-12-28 01:10:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:10:52,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:10:52,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:10:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:10:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:10:52,833 INFO L87 Difference]: Start difference. First operand 69180 states and 96873 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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)