/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:26:45,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:26:45,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:26:45,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:26:45,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:26:45,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:26:45,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:26:45,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:26:45,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:26:45,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:26:45,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:26:45,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:26:45,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:26:45,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:26:45,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:26:45,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:26:45,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:26:45,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:26:45,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:26:45,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:26:45,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:26:45,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:26:45,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:26:45,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:26:45,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:26:45,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:26:45,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:26:45,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:26:45,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:26:45,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:26:45,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:26:45,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:26:45,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:26:45,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:26:45,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:26:45,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:26:45,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:26:45,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:26:45,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:26:45,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:26:45,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:26:45,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 20:26:45,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:26:45,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:26:45,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:26:45,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:26:45,487 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:26:45,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:26:45,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:26:45,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:26:45,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:26:45,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:26:45,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:26:45,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:26:45,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:26:45,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:26:45,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:26:45,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:26:45,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:26:45,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:26:45,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:26:45,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:26:45,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:26:45,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:26:45,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:26:45,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:26:45,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:26:45,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:26:45,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:26:45,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:26:45,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:26:45,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:26:45,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:26:45,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:26:45,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:26:45,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:26:45,832 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:26:45,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-08-18 20:26:45,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/030130800/74a2e70e1ea74fa68d615143c7eaa778/FLAGa426a15fa [2020-08-18 20:26:46,433 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:26:46,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_4.c [2020-08-18 20:26:46,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/030130800/74a2e70e1ea74fa68d615143c7eaa778/FLAGa426a15fa [2020-08-18 20:26:46,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/030130800/74a2e70e1ea74fa68d615143c7eaa778 [2020-08-18 20:26:46,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:26:46,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:26:46,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:26:46,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:26:46,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:26:46,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:26:46" (1/1) ... [2020-08-18 20:26:46,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40289bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:46, skipping insertion in model container [2020-08-18 20:26:46,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:26:46" (1/1) ... [2020-08-18 20:26:46,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:26:46,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:26:47,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:26:47,183 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:26:47,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:26:47,274 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:26:47,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47 WrapperNode [2020-08-18 20:26:47,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:26:47,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:26:47,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:26:47,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:26:47,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... [2020-08-18 20:26:47,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:26:47,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:26:47,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:26:47,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:26:47,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:26:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:26:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:26:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 20:26:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-08-18 20:26:47,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-08-18 20:26:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-08-18 20:26:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:26:47,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 20:26:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:26:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:26:47,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-08-18 20:26:47,445 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 20:26:47,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:26:47,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 20:26:47,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:26:48,659 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:26:48,659 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-08-18 20:26:48,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:26:48 BoogieIcfgContainer [2020-08-18 20:26:48,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:26:48,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:26:48,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:26:48,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:26:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:26:46" (1/3) ... [2020-08-18 20:26:48,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b9fddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:26:48, skipping insertion in model container [2020-08-18 20:26:48,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:26:47" (2/3) ... [2020-08-18 20:26:48,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b9fddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:26:48, skipping insertion in model container [2020-08-18 20:26:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:26:48" (3/3) ... [2020-08-18 20:26:48,675 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_4.c [2020-08-18 20:26:48,686 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:26:48,695 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:26:48,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:26:48,735 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:26:48,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:26:48,735 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:26:48,736 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:26:48,736 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:26:48,736 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:26:48,737 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:26:48,737 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:26:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-08-18 20:26:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 20:26:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:26:48,772 INFO L422 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] [2020-08-18 20:26:48,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:26:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:26:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1328586124, now seen corresponding path program 1 times [2020-08-18 20:26:48,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:26:48,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096935346] [2020-08-18 20:26:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:26:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:49,305 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-18 20:26:49,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:26:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:26:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:49,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 20:26:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:49,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:26:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:26:49,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096935346] [2020-08-18 20:26:49,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:26:49,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:26:49,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754510618] [2020-08-18 20:26:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:26:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:26:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:26:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:26:49,458 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 5 states. [2020-08-18 20:26:49,633 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-18 20:26:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:26:52,658 INFO L93 Difference]: Finished difference Result 267 states and 410 transitions. [2020-08-18 20:26:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:26:52,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-08-18 20:26:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:26:52,674 INFO L225 Difference]: With dead ends: 267 [2020-08-18 20:26:52,674 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 20:26:52,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:26:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 20:26:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-08-18 20:26:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-18 20:26:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 168 transitions. [2020-08-18 20:26:52,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 168 transitions. Word has length 43 [2020-08-18 20:26:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:26:52,747 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 168 transitions. [2020-08-18 20:26:52,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:26:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 168 transitions. [2020-08-18 20:26:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 20:26:52,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:26:52,752 INFO L422 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] [2020-08-18 20:26:52,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:26:52,752 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:26:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:26:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash -294008176, now seen corresponding path program 1 times [2020-08-18 20:26:52,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:26:52,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564458474] [2020-08-18 20:26:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:26:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:52,937 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-18 20:26:52,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:26:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:26:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:53,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 20:26:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:53,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 20:26:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:26:53,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564458474] [2020-08-18 20:26:53,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:26:53,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:26:53,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54491418] [2020-08-18 20:26:53,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:26:53,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:26:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:26:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:26:53,048 INFO L87 Difference]: Start difference. First operand 121 states and 168 transitions. Second operand 6 states. [2020-08-18 20:26:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:26:56,183 INFO L93 Difference]: Finished difference Result 268 states and 386 transitions. [2020-08-18 20:26:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:26:56,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-08-18 20:26:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:26:56,190 INFO L225 Difference]: With dead ends: 268 [2020-08-18 20:26:56,191 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 20:26:56,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:26:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 20:26:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 123. [2020-08-18 20:26:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-18 20:26:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-08-18 20:26:56,233 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 45 [2020-08-18 20:26:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:26:56,234 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-08-18 20:26:56,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:26:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-08-18 20:26:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 20:26:56,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:26:56,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:26:56,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:26:56,237 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:26:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:26:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1235066606, now seen corresponding path program 2 times [2020-08-18 20:26:56,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:26:56,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4234986] [2020-08-18 20:26:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:26:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:56,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:26:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:26:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 20:26:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:56,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 20:26:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:26:56,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4234986] [2020-08-18 20:26:56,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:26:56,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:26:56,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875921199] [2020-08-18 20:26:56,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:26:56,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:26:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:26:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:26:56,555 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 7 states. [2020-08-18 20:26:56,679 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-18 20:26:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:26:57,924 INFO L93 Difference]: Finished difference Result 288 states and 418 transitions. [2020-08-18 20:26:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:26:57,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-08-18 20:26:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:26:57,928 INFO L225 Difference]: With dead ends: 288 [2020-08-18 20:26:57,928 INFO L226 Difference]: Without dead ends: 183 [2020-08-18 20:26:57,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:26:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-08-18 20:26:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 125. [2020-08-18 20:26:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 20:26:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2020-08-18 20:26:57,965 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 47 [2020-08-18 20:26:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:26:57,966 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2020-08-18 20:26:57,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:26:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2020-08-18 20:26:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 20:26:57,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:26:57,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:26:57,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:26:57,995 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:26:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:26:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash 636445864, now seen corresponding path program 1 times [2020-08-18 20:26:57,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:26:57,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084507502] [2020-08-18 20:26:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:26:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:58,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:26:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:58,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:26:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:58,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:26:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:58,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:26:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:26:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 20:26:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084507502] [2020-08-18 20:26:58,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:26:58,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:26:58,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844930383] [2020-08-18 20:26:58,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:26:58,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:26:58,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:26:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:26:58,294 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand 8 states. [2020-08-18 20:26:58,414 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-18 20:27:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:01,323 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2020-08-18 20:27:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:27:01,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-08-18 20:27:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:01,327 INFO L225 Difference]: With dead ends: 309 [2020-08-18 20:27:01,327 INFO L226 Difference]: Without dead ends: 204 [2020-08-18 20:27:01,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:27:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-18 20:27:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-08-18 20:27:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 20:27:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2020-08-18 20:27:01,348 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 53 [2020-08-18 20:27:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:01,349 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2020-08-18 20:27:01,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:27:01,349 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2020-08-18 20:27:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 20:27:01,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:01,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-18 20:27:01,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:27:01,351 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -375236310, now seen corresponding path program 2 times [2020-08-18 20:27:01,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:01,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603344524] [2020-08-18 20:27:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:01,520 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-18 20:27:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:01,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:27:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:01,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:27:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-18 20:27:01,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603344524] [2020-08-18 20:27:01,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:01,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:27:01,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290024226] [2020-08-18 20:27:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:01,659 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand 5 states. [2020-08-18 20:27:01,770 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-18 20:27:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:02,550 INFO L93 Difference]: Finished difference Result 178 states and 240 transitions. [2020-08-18 20:27:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:27:02,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-08-18 20:27:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:02,553 INFO L225 Difference]: With dead ends: 178 [2020-08-18 20:27:02,553 INFO L226 Difference]: Without dead ends: 135 [2020-08-18 20:27:02,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-18 20:27:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-08-18 20:27:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 20:27:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 173 transitions. [2020-08-18 20:27:02,569 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 173 transitions. Word has length 55 [2020-08-18 20:27:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:02,570 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 173 transitions. [2020-08-18 20:27:02,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 173 transitions. [2020-08-18 20:27:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 20:27:02,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:02,572 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-18 20:27:02,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:27:02,572 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:02,572 INFO L82 PathProgramCache]: Analyzing trace with hash -7587439, now seen corresponding path program 1 times [2020-08-18 20:27:02,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:02,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736600823] [2020-08-18 20:27:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:02,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:02,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:02,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:27:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 20:27:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-18 20:27:02,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736600823] [2020-08-18 20:27:02,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:02,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:27:02,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842578622] [2020-08-18 20:27:02,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:02,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:02,763 INFO L87 Difference]: Start difference. First operand 127 states and 173 transitions. Second operand 5 states. [2020-08-18 20:27:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:03,674 INFO L93 Difference]: Finished difference Result 188 states and 256 transitions. [2020-08-18 20:27:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:27:03,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-08-18 20:27:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:03,676 INFO L225 Difference]: With dead ends: 188 [2020-08-18 20:27:03,676 INFO L226 Difference]: Without dead ends: 145 [2020-08-18 20:27:03,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-18 20:27:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2020-08-18 20:27:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-18 20:27:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-08-18 20:27:03,707 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 56 [2020-08-18 20:27:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:03,708 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-08-18 20:27:03,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-08-18 20:27:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:27:03,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:03,710 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-18 20:27:03,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:27:03,711 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2075209529, now seen corresponding path program 1 times [2020-08-18 20:27:03,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:03,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187632055] [2020-08-18 20:27:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:27:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:27:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 20:27:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-18 20:27:03,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187632055] [2020-08-18 20:27:03,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:27:03,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:27:03,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764577463] [2020-08-18 20:27:03,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:27:03,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:27:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:27:03,921 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 5 states. [2020-08-18 20:27:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:04,711 INFO L93 Difference]: Finished difference Result 167 states and 223 transitions. [2020-08-18 20:27:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:27:04,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-18 20:27:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:04,713 INFO L225 Difference]: With dead ends: 167 [2020-08-18 20:27:04,713 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 20:27:04,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 20:27:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-08-18 20:27:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-18 20:27:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2020-08-18 20:27:04,726 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 61 [2020-08-18 20:27:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:04,727 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2020-08-18 20:27:04,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:27:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2020-08-18 20:27:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:27:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:04,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:04,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:27:04,729 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash 450483994, now seen corresponding path program 1 times [2020-08-18 20:27:04,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:04,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166395501] [2020-08-18 20:27:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:27:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:27:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 20:27:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 20:27:04,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166395501] [2020-08-18 20:27:04,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:04,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 20:27:04,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847283415] [2020-08-18 20:27:04,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:27:04,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:27:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:27:04,959 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand 6 states. [2020-08-18 20:27:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:06,026 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-08-18 20:27:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:27:06,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 20:27:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:06,028 INFO L225 Difference]: With dead ends: 171 [2020-08-18 20:27:06,029 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 20:27:06,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 20:27:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-08-18 20:27:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-18 20:27:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2020-08-18 20:27:06,046 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 61 [2020-08-18 20:27:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:06,047 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2020-08-18 20:27:06,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:27:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2020-08-18 20:27:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 20:27:06,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:06,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:06,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:27:06,049 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:06,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1892847615, now seen corresponding path program 2 times [2020-08-18 20:27:06,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:06,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585624174] [2020-08-18 20:27:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:27:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 20:27:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 20:27:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 20:27:06,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585624174] [2020-08-18 20:27:06,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:06,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:27:06,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708733416] [2020-08-18 20:27:06,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:27:06,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:27:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:27:06,343 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand 7 states. [2020-08-18 20:27:06,467 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-18 20:27:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:07,591 INFO L93 Difference]: Finished difference Result 175 states and 235 transitions. [2020-08-18 20:27:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:27:07,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-08-18 20:27:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:07,593 INFO L225 Difference]: With dead ends: 175 [2020-08-18 20:27:07,594 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 20:27:07,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:27:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 20:27:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-08-18 20:27:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 20:27:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2020-08-18 20:27:07,608 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 65 [2020-08-18 20:27:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:07,609 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2020-08-18 20:27:07,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:27:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2020-08-18 20:27:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 20:27:07,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:07,611 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:07,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:27:07,611 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 212614504, now seen corresponding path program 3 times [2020-08-18 20:27:07,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:07,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879721262] [2020-08-18 20:27:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:27:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 20:27:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:27:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 20:27:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 20:27:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:27:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 20:27:07,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879721262] [2020-08-18 20:27:07,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:27:07,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:27:07,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166324608] [2020-08-18 20:27:07,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:27:07,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:27:07,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:27:07,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:27:07,873 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand 8 states. [2020-08-18 20:27:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:27:10,182 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2020-08-18 20:27:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:27:10,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-08-18 20:27:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:27:10,185 INFO L225 Difference]: With dead ends: 179 [2020-08-18 20:27:10,186 INFO L226 Difference]: Without dead ends: 144 [2020-08-18 20:27:10,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:27:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-18 20:27:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-08-18 20:27:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-18 20:27:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2020-08-18 20:27:10,199 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 69 [2020-08-18 20:27:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:27:10,199 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2020-08-18 20:27:10,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:27:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2020-08-18 20:27:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 20:27:10,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:27:10,201 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:27:10,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:27:10,201 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:27:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:27:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash -374866097, now seen corresponding path program 4 times [2020-08-18 20:27:10,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:27:10,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888262437] [2020-08-18 20:27:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:27:10,237 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 20:27:10,238 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 20:27:10,238 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:27:10,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:27:10,271 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 20:27:10,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:27:10 BoogieIcfgContainer [2020-08-18 20:27:10,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:27:10,273 INFO L168 Benchmark]: Toolchain (without parser) took 23527.86 ms. Allocated memory was 140.5 MB in the beginning and 415.2 MB in the end (delta: 274.7 MB). Free memory was 102.4 MB in the beginning and 191.7 MB in the end (delta: -89.3 MB). Peak memory consumption was 185.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,274 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 529.02 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 173.7 MB in the end (delta: -71.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,276 INFO L168 Benchmark]: Boogie Preprocessor took 91.80 ms. Allocated memory is still 203.9 MB. Free memory was 173.7 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,276 INFO L168 Benchmark]: RCFGBuilder took 1297.96 ms. Allocated memory is still 203.9 MB. Free memory was 168.6 MB in the beginning and 106.7 MB in the end (delta: 62.0 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,277 INFO L168 Benchmark]: TraceAbstraction took 21604.03 ms. Allocated memory was 203.9 MB in the beginning and 415.2 MB in the end (delta: 211.3 MB). Free memory was 105.7 MB in the beginning and 191.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 125.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:27:10,281 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 529.02 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 173.7 MB in the end (delta: -71.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.80 ms. Allocated memory is still 203.9 MB. Free memory was 173.7 MB in the beginning and 169.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1297.96 ms. Allocated memory is still 203.9 MB. Free memory was 168.6 MB in the beginning and 106.7 MB in the end (delta: 62.0 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21604.03 ms. Allocated memory was 203.9 MB in the beginning and 415.2 MB in the end (delta: 211.3 MB). Free memory was 105.7 MB in the beginning and 191.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 125.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 461]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L179] unsigned int Id_MCDC_104; [L180] UINT16 Id_MCDC_105; [L181] UINT16 Id_MCDC_106; [L182] Od_IndexTable* Id_MCDC_107; [L183] Od_IndexTable* Id_MCDC_108; [L184] Od_IndexTable* Id_MCDC_109; [L185] Od_IndexTable* Id_MCDC_110; [L186] Od_IndexTable* Id_MCDC_111; [L187] UINT32 Id_MCDC_112 [4]; [L188] CanOpenNode Id_MCDC_113; [L189] UINT32 Id_MCDC_114=0; [L427] void * Id_MCDC_143; [L428] void * Id_MCDC_144; [L429] void * Id_MCDC_145; [L430] void * Id_MCDC_146; [L431] void * Id_MCDC_147; [L432] void * Id_MCDC_148; [L433] int Id_MCDC_149; [L434] int Id_MCDC_150; [L435] int Id_MCDC_151; [L436] int Id_MCDC_152; [L437] int Id_MCDC_153; [L438] int Id_MCDC_154; [L439] int Id_MCDC_155; [L440] short Id_MCDC_156; [L441] short Id_MCDC_157; [L442] FILE* Id_MCDC_158; [L443] unsigned short Id_MCDC_159; [L444] unsigned short Id_MCDC_160; [L445] unsigned short Id_MCDC_161=0; [L446] unsigned short Id_MCDC_162=0; [L447] char Id_MCDC_163; [L448] char Id_MCDC_164; [L449] Id_MCDC_158 = fopen("in.eds", "r") [L450] COND FALSE !(Id_MCDC_158 == (( void * ) 0)) [L455] CALL Id_MCDC_100() [L420] int Id_MCDC_141; [L421] void * Id_MCDC_142; [L422] CALL Id_MCDC_99() [L400] CHAR Id_MCDC_139 [4]={0, 0, 0, 0}; [L401] UINT32 Id_MCDC_140=0; [L402] Id_MCDC_113.Id_MCDC_66 = ( PDO_Buffer* ) malloc(372) [L403] CALL Id_MCDC_97() [L331] UINT32 Id_MCDC_123; [L332] UINT32 Id_MCDC_124; [L333] UINT32 Id_MCDC_125; [L334] UINT32 Id_MCDC_126; [L335] UINT32 Id_MCDC_127; [L336] UINT32 Id_MCDC_128=0x00; [L337] UINT16 Id_MCDC_129; [L338] UINT32 Id_MCDC_130=0x00; [L339] UINT32 Id_MCDC_131=0x00; [L340] UINT8 Id_MCDC_35=0; [L341] UINT8 Id_MCDC_132=0; [L342] UINT8 Id_MCDC_36=0; [L343] UINT8 Id_MCDC_133=0; [L344] UINT8 Id_MCDC_134=0x00; [L345] INT32 Id_MCDC_135; [L346] void * Id_MCDC_136; [L347] UINT32* Id_MCDC_137; [L348] UINT16 Id_MCDC_138; [L349] Id_MCDC_123 = 0x1800 [L350] Id_MCDC_132 = 0 [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND FALSE !(Id_MCDC_132 < 4) [L354] COND TRUE Id_MCDC_123 <= 0x1803 [L356] Id_MCDC_138 = 0 [L356] COND TRUE Id_MCDC_138 < 4 [L358] Id_MCDC_126 = Id_MCDC_123 [L359] CALL, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L193] UINT32 Id_MCDC_115=0x80000000; [L194] Od_IndexTable* Id_MCDC_116; [L195] Id_MCDC_116 = Id_MCDC_111 [L196] COND TRUE Id_MCDC_116 == (( void * ) 0) [L198] return 0x08000023; [L359] RET, EXPR Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) [L359] COND TRUE Id_MCDC_89(Id_MCDC_123, 1, & Id_MCDC_131, & Id_MCDC_130, & Id_MCDC_135, ( void * ) & Id_MCDC_128, 0) != 0x00 [L361] return 0xFFFF; [L336] UINT32 Id_MCDC_128=0x00; [L361] return 0xFFFF; [L338] UINT32 Id_MCDC_130=0x00; [L361] return 0xFFFF; [L339] UINT32 Id_MCDC_131=0x00; [L361] return 0xFFFF; [L361] return 0xFFFF; [L361] return 0xFFFF; [L403] RET Id_MCDC_97() [L404] Id_MCDC_140 = 0 [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND TRUE Id_MCDC_140 < 4 [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] EXPR Id_MCDC_113.Id_MCDC_66 [L406] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L406] (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L406] COND TRUE (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 <= 240) && (Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 >= 1) [L408] EXPR Id_MCDC_113.Id_MCDC_66 [L408] EXPR Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L408] Id_MCDC_139[Id_MCDC_140] = Id_MCDC_113.Id_MCDC_66->Id_MCDC_42[Id_MCDC_140].Id_MCDC_34 [L404] Id_MCDC_140++ [L404] COND FALSE !(Id_MCDC_140 < 4) [L415] CALL Id_MCDC_95(4, Id_MCDC_139) [L280] UINT32 Id_MCDC_121=0; [L281] UINT32 Id_MCDC_122=0; [L282] COND FALSE !(Id_MCDC_93 < 2) [L286] COND FALSE !(Id_MCDC_93 != 2) [L292] EXPR Id_MCDC_94[1] [L292] Id_MCDC_122 = Id_MCDC_94[1] [L294] EXPR Id_MCDC_94[0] [L294] CALL, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L249] UINT32 Id_MCDC_117=0; [L250] UINT32 Id_MCDC_118=0; [L251] UINT32 Id_MCDC_119=1; [L252] UINT32 Id_MCDC_120=0; [L253] COND FALSE !(Id_MCDC_90 > Id_MCDC_91) [L259] COND FALSE !(Id_MCDC_90 < Id_MCDC_91) [L266] return Id_MCDC_90; [L294] RET, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L294] Id_MCDC_121 = Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L295] CALL avoid_zero(Id_MCDC_121 != 0) [L9] COND FALSE !(!y) [L295] RET avoid_zero(Id_MCDC_121 != 0) [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295 [L296] CALL __VERIFIER_assert(( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) >= 0 && ( long long ) ((Id_MCDC_94[0] * Id_MCDC_122) / Id_MCDC_121) <= 4294967295) [L459] COND TRUE ! (Id_MCDC_103) [L461] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 21.5s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 18.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1494 SDtfs, 2307 SDslu, 1524 SDs, 0 SdLazy, 3927 SolverSat, 486 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 14.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 233 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 545 ConstructedInterpolants, 0 QuantifiedInterpolants, 115174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 108/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...