/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 10:00:15,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 10:00:15,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 10:00:15,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 10:00:15,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 10:00:15,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 10:00:15,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 10:00:15,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 10:00:15,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 10:00:15,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 10:00:15,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 10:00:15,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 10:00:15,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 10:00:15,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 10:00:15,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 10:00:15,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 10:00:15,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 10:00:15,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 10:00:15,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 10:00:15,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 10:00:15,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 10:00:15,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 10:00:15,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 10:00:15,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 10:00:15,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 10:00:15,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 10:00:15,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 10:00:15,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 10:00:15,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 10:00:15,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 10:00:15,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 10:00:15,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 10:00:15,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 10:00:15,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 10:00:15,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 10:00:15,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 10:00:15,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 10:00:15,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 10:00:15,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 10:00:15,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 10:00:15,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 10:00:15,505 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 [2020-10-29 10:00:15,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 10:00:15,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 10:00:15,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 10:00:15,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 10:00:15,566 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 10:00:15,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 10:00:15,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 10:00:15,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 10:00:15,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 10:00:15,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 10:00:15,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 10:00:15,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 10:00:15,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 10:00:15,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 10:00:15,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 10:00:15,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 10:00:15,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 10:00:15,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 10:00:15,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 10:00:15,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 10:00:15,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 10:00:15,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 10:00:15,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 10:00:15,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 10:00:15,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 10:00:15,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 10:00:15,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 10:00:15,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 10:00:15,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 10:00:15,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 10:00:16,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 10:00:16,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 10:00:16,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 10:00:16,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 10:00:16,095 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 10:00:16,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2020-10-29 10:00:16,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9044ba82/0c8525457fd44ea184a3eb1dee008ed5/FLAGc81e03410 [2020-10-29 10:00:16,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 10:00:16,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/ludcmp.c [2020-10-29 10:00:16,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9044ba82/0c8525457fd44ea184a3eb1dee008ed5/FLAGc81e03410 [2020-10-29 10:00:17,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9044ba82/0c8525457fd44ea184a3eb1dee008ed5 [2020-10-29 10:00:17,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 10:00:17,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 10:00:17,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 10:00:17,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 10:00:17,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 10:00:17,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329de2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17, skipping insertion in model container [2020-10-29 10:00:17,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 10:00:17,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 10:00:17,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:00:17,586 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 10:00:17,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:00:17,656 INFO L208 MainTranslator]: Completed translation [2020-10-29 10:00:17,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17 WrapperNode [2020-10-29 10:00:17,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 10:00:17,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 10:00:17,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 10:00:17,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 10:00:17,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (1/1) ... [2020-10-29 10:00:17,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 10:00:17,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 10:00:17,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 10:00:17,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 10:00:17,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (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 [2020-10-29 10:00:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 10:00:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 10:00:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 10:00:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 10:00:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-10-29 10:00:17,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 10:00:17,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-10-29 10:00:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 10:00:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 10:00:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 10:00:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-29 10:00:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 10:00:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 10:00:18,460 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 10:00:18,460 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-29 10:00:18,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:00:18 BoogieIcfgContainer [2020-10-29 10:00:18,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 10:00:18,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 10:00:18,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 10:00:18,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 10:00:18,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 10:00:17" (1/3) ... [2020-10-29 10:00:18,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f39f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:00:18, skipping insertion in model container [2020-10-29 10:00:18,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:17" (2/3) ... [2020-10-29 10:00:18,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f39f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:00:18, skipping insertion in model container [2020-10-29 10:00:18,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:00:18" (3/3) ... [2020-10-29 10:00:18,473 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-10-29 10:00:18,488 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 10:00:18,494 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 10:00:18,508 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 10:00:18,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 10:00:18,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 10:00:18,540 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 10:00:18,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 10:00:18,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 10:00:18,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 10:00:18,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 10:00:18,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 10:00:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-29 10:00:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 10:00:18,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:18,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:18,570 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash 636154150, now seen corresponding path program 1 times [2020-10-29 10:00:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226852381] [2020-10-29 10:00:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:18,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:18,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 10:00:18,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:18,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-29 10:00:18,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:18,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:18,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 10:00:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 10:00:19,135 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-29 10:00:19,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:19,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:19,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:19,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:19,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:19,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 10:00:19,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:19,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:19,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226852381] [2020-10-29 10:00:19,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:00:19,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 10:00:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521221798] [2020-10-29 10:00:19,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 10:00:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 10:00:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 10:00:19,224 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-29 10:00:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:19,589 INFO L93 Difference]: Finished difference Result 132 states and 197 transitions. [2020-10-29 10:00:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 10:00:19,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-29 10:00:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:19,602 INFO L225 Difference]: With dead ends: 132 [2020-10-29 10:00:19,602 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 10:00:19,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 10:00:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 10:00:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-10-29 10:00:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 10:00:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 10:00:19,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-29 10:00:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:19,654 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 10:00:19,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 10:00:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 10:00:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 10:00:19,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:19,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:19,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 10:00:19,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:19,657 INFO L82 PathProgramCache]: Analyzing trace with hash 263975187, now seen corresponding path program 1 times [2020-10-29 10:00:19,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:19,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444671881] [2020-10-29 10:00:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:19,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:19,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:19,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 10:00:19,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:19,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-29 10:00:19,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:19,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 10:00:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 10:00:19,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:19,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:19,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:19,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:19,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:19,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444671881] [2020-10-29 10:00:19,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:00:19,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 10:00:19,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568539153] [2020-10-29 10:00:20,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 10:00:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 10:00:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:00:20,007 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-29 10:00:20,260 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-29 10:00:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:20,392 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-29 10:00:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 10:00:20,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-29 10:00:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:20,394 INFO L225 Difference]: With dead ends: 42 [2020-10-29 10:00:20,395 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 10:00:20,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:00:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 10:00:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-29 10:00:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 10:00:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-29 10:00:20,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-10-29 10:00:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:20,419 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-29 10:00:20,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 10:00:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-29 10:00:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 10:00:20,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:20,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:20,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 10:00:20,421 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1988851656, now seen corresponding path program 1 times [2020-10-29 10:00:20,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:20,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579200310] [2020-10-29 10:00:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:20,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:20,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 10:00:20,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-29 10:00:20,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:20,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:00:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 10:00:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:20,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:21,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:21,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:21,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:21,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 10:00:21,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:21,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:21,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579200310] [2020-10-29 10:00:21,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:21,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 10:00:21,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144893399] [2020-10-29 10:00:21,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:00:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:21,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:00:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:00:21,015 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-29 10:00:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:21,320 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-29 10:00:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:00:21,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 10:00:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:21,323 INFO L225 Difference]: With dead ends: 47 [2020-10-29 10:00:21,323 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 10:00:21,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 10:00:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-29 10:00:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 10:00:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-29 10:00:21,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-29 10:00:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:21,339 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-29 10:00:21,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:00:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-29 10:00:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 10:00:21,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:21,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:21,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 10:00:21,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1189935907, now seen corresponding path program 2 times [2020-10-29 10:00:21,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263874745] [2020-10-29 10:00:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:21,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:22,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:22,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 10:00:22,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 10:00:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-29 10:00:22,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:22,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:00:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:00:22,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:22,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:22,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:22,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:22,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:00:22,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:22,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:22,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:22,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263874745] [2020-10-29 10:00:22,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:00:22,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 10:00:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779513587] [2020-10-29 10:00:22,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:00:22,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:00:22,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:00:22,149 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-10-29 10:00:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:22,470 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-29 10:00:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 10:00:22,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 10:00:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:22,472 INFO L225 Difference]: With dead ends: 74 [2020-10-29 10:00:22,472 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 10:00:22,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 10:00:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2020-10-29 10:00:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 10:00:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-29 10:00:22,484 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2020-10-29 10:00:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:22,484 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-29 10:00:22,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:00:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-29 10:00:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 10:00:22,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:22,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:22,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 10:00:22,486 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash -509877537, now seen corresponding path program 1 times [2020-10-29 10:00:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:22,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49687606] [2020-10-29 10:00:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:22,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:22,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 10:00:22,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:22,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-29 10:00:22,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:22,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:22,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 10:00:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 10:00:22,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:22,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:22,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:22,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:22,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:22,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49687606] [2020-10-29 10:00:22,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:22,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 10:00:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57689056] [2020-10-29 10:00:22,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 10:00:22,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 10:00:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:00:22,935 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-10-29 10:00:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:23,206 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-29 10:00:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 10:00:23,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-29 10:00:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:23,208 INFO L225 Difference]: With dead ends: 77 [2020-10-29 10:00:23,208 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 10:00:23,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:00:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 10:00:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-29 10:00:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 10:00:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-29 10:00:23,219 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2020-10-29 10:00:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:23,219 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-29 10:00:23,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 10:00:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-29 10:00:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 10:00:23,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:23,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:23,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 10:00:23,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -877161978, now seen corresponding path program 2 times [2020-10-29 10:00:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468701048] [2020-10-29 10:00:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:23,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:23,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:00:23,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:23,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 10:00:23,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:23,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:23,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:23,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 10:00:23,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:23,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:23,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 10:00:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:23,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468701048] [2020-10-29 10:00:23,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:23,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:00:23,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644924498] [2020-10-29 10:00:23,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:00:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:00:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:00:23,654 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-29 10:00:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:24,013 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-10-29 10:00:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:00:24,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-29 10:00:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:24,015 INFO L225 Difference]: With dead ends: 93 [2020-10-29 10:00:24,015 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 10:00:24,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-29 10:00:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 10:00:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-29 10:00:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 10:00:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-29 10:00:24,037 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 25 [2020-10-29 10:00:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:24,038 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-29 10:00:24,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:00:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-29 10:00:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 10:00:24,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:24,040 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:24,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 10:00:24,041 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -729197139, now seen corresponding path program 3 times [2020-10-29 10:00:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580150673] [2020-10-29 10:00:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:24,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 10:00:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:24,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:00:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:24,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:24,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:24,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:24,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:24,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:24,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:00:24,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:24,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:24,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:24,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580150673] [2020-10-29 10:00:24,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:24,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 10:00:24,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677565757] [2020-10-29 10:00:24,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 10:00:24,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:24,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 10:00:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:00:24,551 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2020-10-29 10:00:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:24,864 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-10-29 10:00:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 10:00:24,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 10:00:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:24,867 INFO L225 Difference]: With dead ends: 109 [2020-10-29 10:00:24,867 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 10:00:24,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-29 10:00:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 10:00:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-29 10:00:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 10:00:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-29 10:00:24,888 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 29 [2020-10-29 10:00:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:24,889 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-29 10:00:24,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 10:00:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-29 10:00:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:00:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:24,893 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:24,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 10:00:24,894 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -772608556, now seen corresponding path program 4 times [2020-10-29 10:00:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:24,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123492496] [2020-10-29 10:00:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:24,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:25,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:25,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:00:25,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-29 10:00:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:25,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:00:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 10:00:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:25,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:25,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:25,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:25,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:25,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:25,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123492496] [2020-10-29 10:00:25,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:25,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:00:25,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880541016] [2020-10-29 10:00:25,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:00:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:25,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:00:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:25,398 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 10 states. [2020-10-29 10:00:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:25,691 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-10-29 10:00:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:00:25,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 10:00:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:25,693 INFO L225 Difference]: With dead ends: 152 [2020-10-29 10:00:25,693 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 10:00:25,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:00:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 10:00:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2020-10-29 10:00:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 10:00:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-29 10:00:25,705 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 33 [2020-10-29 10:00:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:25,706 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-29 10:00:25,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:00:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-29 10:00:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:00:25,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:25,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:25,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 10:00:25,707 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:25,708 INFO L82 PathProgramCache]: Analyzing trace with hash -632059946, now seen corresponding path program 1 times [2020-10-29 10:00:25,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:25,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084095550] [2020-10-29 10:00:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:25,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:00:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:26,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 10:00:26,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:26,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:26,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:26,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:26,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 10:00:26,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:26,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:26,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:00:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:26,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084095550] [2020-10-29 10:00:26,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:26,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:00:26,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787041043] [2020-10-29 10:00:26,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:00:26,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:26,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:00:26,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:26,154 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 10 states. [2020-10-29 10:00:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:26,548 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2020-10-29 10:00:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:00:26,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 10:00:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:26,551 INFO L225 Difference]: With dead ends: 138 [2020-10-29 10:00:26,551 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 10:00:26,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-10-29 10:00:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 10:00:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-29 10:00:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 10:00:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-29 10:00:26,574 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 33 [2020-10-29 10:00:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:26,575 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-29 10:00:26,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:00:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-29 10:00:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 10:00:26,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:26,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:26,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 10:00:26,581 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1391860347, now seen corresponding path program 5 times [2020-10-29 10:00:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196949975] [2020-10-29 10:00:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 10:00:26,599 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 10:00:26,599 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 10:00:26,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 10:00:26,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 10:00:26 BoogieIcfgContainer [2020-10-29 10:00:26,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 10:00:26,626 INFO L168 Benchmark]: Toolchain (without parser) took 9390.70 ms. Allocated memory was 125.8 MB in the beginning and 238.0 MB in the end (delta: 112.2 MB). Free memory was 100.7 MB in the beginning and 105.3 MB in the end (delta: -4.5 MB). Peak memory consumption was 108.9 MB. Max. memory is 8.0 GB. [2020-10-29 10:00:26,627 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 10:00:26,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.25 ms. Allocated memory is still 125.8 MB. Free memory was 100.1 MB in the beginning and 88.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-29 10:00:26,628 INFO L168 Benchmark]: Boogie Preprocessor took 64.46 ms. Allocated memory is still 125.8 MB. Free memory was 88.3 MB in the beginning and 86.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 10:00:26,629 INFO L168 Benchmark]: RCFGBuilder took 739.02 ms. Allocated memory was 125.8 MB in the beginning and 164.6 MB in the end (delta: 38.8 MB). Free memory was 86.0 MB in the beginning and 132.7 MB in the end (delta: -46.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2020-10-29 10:00:26,630 INFO L168 Benchmark]: TraceAbstraction took 8159.88 ms. Allocated memory was 164.6 MB in the beginning and 238.0 MB in the end (delta: 73.4 MB). Free memory was 132.3 MB in the beginning and 105.3 MB in the end (delta: 27.0 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. [2020-10-29 10:00:26,633 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 412.25 ms. Allocated memory is still 125.8 MB. Free memory was 100.1 MB in the beginning and 88.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.46 ms. Allocated memory is still 125.8 MB. Free memory was 88.3 MB in the beginning and 86.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 739.02 ms. Allocated memory was 125.8 MB in the beginning and 164.6 MB in the end (delta: 38.8 MB). Free memory was 86.0 MB in the beginning and 132.7 MB in the end (delta: -46.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8159.88 ms. Allocated memory was 164.6 MB in the beginning and 238.0 MB in the end (delta: 73.4 MB). Free memory was 132.3 MB in the beginning and 105.3 MB in the end (delta: 27.0 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "ludcmp.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 320 SDslu, 271 SDs, 0 SdLazy, 607 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 106 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 24988 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 6/146 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...