/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=DEEPEST --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/array-crafted/mapsum5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:10,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:10,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:10,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:10,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:10,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:10,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:10,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:10,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:10,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:10,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:10,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:10,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:10,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:10,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:10,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:10,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:10,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:10,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:10,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:10,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:10,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:10,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:10,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:10,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:10,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:10,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:10,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:10,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:10,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:10,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:10,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:10,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:10,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:10,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:10,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:10,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:10,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:10,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:10,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:10,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:10,564 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 [2020-10-27 14:07:10,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:10,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:10,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:10,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:10,618 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:10,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:10,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:10,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:10,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:10,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:10,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:10,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:10,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:10,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:10,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:10,621 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:10,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:10,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:10,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:10,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:10,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:10,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:10,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:10,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:10,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:10,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:10,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:10,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:10,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:10,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:11,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:11,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:11,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:11,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:11,107 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:11,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum5.i [2020-10-27 14:07:11,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6762beb0a/7a7674cde79644ddb9eab894b06029f1/FLAG915ebfed6 [2020-10-27 14:07:11,741 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:11,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/mapsum5.i [2020-10-27 14:07:11,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6762beb0a/7a7674cde79644ddb9eab894b06029f1/FLAG915ebfed6 [2020-10-27 14:07:12,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6762beb0a/7a7674cde79644ddb9eab894b06029f1 [2020-10-27 14:07:12,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:12,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:12,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:12,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:12,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:12,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ed5188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12, skipping insertion in model container [2020-10-27 14:07:12,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:12,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:12,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:12,469 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:12,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:12,540 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:12,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12 WrapperNode [2020-10-27 14:07:12,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:12,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:12,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:12,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:12,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (1/1) ... [2020-10-27 14:07:12,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:12,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:12,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:12,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:12,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (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 [2020-10-27 14:07:12,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:12,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:12,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:12,727 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2020-10-27 14:07:12,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:07:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:07:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:07:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2020-10-27 14:07:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:13,245 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:13,245 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:07:13,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:13 BoogieIcfgContainer [2020-10-27 14:07:13,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:13,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:13,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:13,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:13,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:12" (1/3) ... [2020-10-27 14:07:13,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fe367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:13, skipping insertion in model container [2020-10-27 14:07:13,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:12" (2/3) ... [2020-10-27 14:07:13,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fe367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:13, skipping insertion in model container [2020-10-27 14:07:13,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:13" (3/3) ... [2020-10-27 14:07:13,257 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum5.i [2020-10-27 14:07:13,286 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:13,292 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:13,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:13,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:13,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:13,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:13,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:13,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:13,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:13,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:13,338 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:07:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:13,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:13,364 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:07:13,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash -62284816, now seen corresponding path program 1 times [2020-10-27 14:07:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:13,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641973205] [2020-10-27 14:07:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:13,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:13,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:13,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:14,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:15,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:07:15,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-10-27 14:07:15,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:07:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:15,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:15,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:15,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:15,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:07:15,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:15,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:15,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:15,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:07:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:15,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:15,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 14:07:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:15,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:15,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:15,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:07:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 14:07:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:15,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:15,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:15,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:15,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:15,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:15,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:07:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:07:15,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641973205] [2020-10-27 14:07:15,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:15,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807113777] [2020-10-27 14:07:15,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:15,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:15,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:15,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:15,802 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:07:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:15,943 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-27 14:07:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:15,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-10-27 14:07:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:15,956 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:07:15,956 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:07:15,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:07:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:07:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:07:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-27 14:07:16,023 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 35 [2020-10-27 14:07:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:16,030 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-27 14:07:16,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-27 14:07:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:16,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:16,035 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:07:16,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:16,036 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:16,037 INFO L82 PathProgramCache]: Analyzing trace with hash -836638934, now seen corresponding path program 1 times [2020-10-27 14:07:16,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:16,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761473966] [2020-10-27 14:07:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:16,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:16,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:16,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:18,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:18,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:07:18,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:18,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-27 14:07:18,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:07:18,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:07:18,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:07:18,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:18,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:18,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:18,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:18,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:18,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:07:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:18,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 14:07:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:18,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:18,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:18,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:18,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:18,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 14:07:18,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:07:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:18,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 14:07:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:18,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:07:18,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:07:19,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761473966] [2020-10-27 14:07:19,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:19,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 14:07:19,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652346328] [2020-10-27 14:07:19,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:07:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:07:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:07:19,018 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2020-10-27 14:07:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:19,450 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-27 14:07:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:07:19,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 14:07:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:19,454 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:07:19,455 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:07:19,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:07:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:07:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-27 14:07:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:07:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-27 14:07:19,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 35 [2020-10-27 14:07:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:19,474 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-27 14:07:19,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:07:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-27 14:07:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:07:19,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:19,476 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:07:19,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:19,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1278743800, now seen corresponding path program 1 times [2020-10-27 14:07:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728852718] [2020-10-27 14:07:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:21,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:07:21,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:07:21,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:21,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:21,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:21,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:21,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:21,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:21,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:21,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:21,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:21,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:07:21,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:21,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:07:21,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:07:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:07:21,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:07:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:21,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:21,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:07:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:07:21,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:21,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:07:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:21,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:21,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 14:07:21,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:21,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:21,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 14:07:21,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:07:21,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728852718] [2020-10-27 14:07:21,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:21,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:07:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577499564] [2020-10-27 14:07:21,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:07:21,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:07:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:07:21,675 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 7 states. [2020-10-27 14:07:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:22,013 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-27 14:07:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:07:22,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-27 14:07:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:22,015 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:07:22,015 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:07:22,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:07:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:07:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 14:07:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:07:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 14:07:22,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2020-10-27 14:07:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:22,031 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 14:07:22,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:07:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 14:07:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:07:22,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:22,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 14:07:22,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:22,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:22,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1482508808, now seen corresponding path program 2 times [2020-10-27 14:07:22,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059054142] [2020-10-27 14:07:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:22,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:22,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2369 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:07:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:24,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:24,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:24,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:24,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:24,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:24,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:07:24,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:07:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:24,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:07:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:24,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:07:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:24,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:07:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:24,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:24,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:24,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:07:24,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:24,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:07:24,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-27 14:07:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:24,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 14:07:24,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059054142] [2020-10-27 14:07:24,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:07:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284581564] [2020-10-27 14:07:24,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:07:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:07:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:07:24,603 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-27 14:07:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:24,961 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-27 14:07:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:07:24,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-27 14:07:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:24,962 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:07:24,962 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 14:07:24,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:07:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 14:07:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 14:07:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:07:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 14:07:24,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 41 [2020-10-27 14:07:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:24,977 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 14:07:24,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:07:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 14:07:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:07:24,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:24,983 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-27 14:07:24,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:24,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash -417542554, now seen corresponding path program 3 times [2020-10-27 14:07:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:24,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480976098] [2020-10-27 14:07:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:25,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4186 [2020-10-27 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:07:29,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:07:29,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:29,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:29,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:29,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:29,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:29,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:07:29,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:07:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:29,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 14:07:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 14:07:29,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:07:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:07:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:07:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:07:29,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480976098] [2020-10-27 14:07:29,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:29,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:07:29,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709498655] [2020-10-27 14:07:29,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:07:29,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:07:29,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:07:29,400 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-10-27 14:07:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:29,706 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-27 14:07:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:07:29,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-27 14:07:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:29,708 INFO L225 Difference]: With dead ends: 51 [2020-10-27 14:07:29,708 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:07:29,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:07:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:07:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 14:07:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:07:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 14:07:29,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 47 [2020-10-27 14:07:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:29,717 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 14:07:29,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:07:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 14:07:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:07:29,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:29,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-27 14:07:29,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:07:29,718 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash -309794300, now seen corresponding path program 1 times [2020-10-27 14:07:29,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:29,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306742207] [2020-10-27 14:07:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:29,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:30,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:31,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:32,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:34,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:34,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:07:34,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:07:34,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:07:34,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:07:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:07:34,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:07:34,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:35,265 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-27 14:07:35,481 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-27 14:07:35,754 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-27 14:07:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:36,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:36,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:36,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:36,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:36,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:36,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:37,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:07:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:37,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:37,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:37,897 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2020-10-27 14:07:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:07:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:38,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:38,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:07:38,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:38,889 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 18 [2020-10-27 14:07:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:07:38,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306742207] [2020-10-27 14:07:38,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:38,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:07:38,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848313863] [2020-10-27 14:07:38,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:07:38,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:38,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:07:38,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:07:38,925 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 25 states. [2020-10-27 14:07:45,120 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-27 14:07:47,738 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-27 14:07:48,147 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-27 14:07:50,588 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-27 14:07:52,949 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 14:07:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:53,071 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-27 14:07:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:07:53,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-27 14:07:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:53,080 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:07:53,080 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:07:53,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:07:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:07:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-10-27 14:07:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:07:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 14:07:53,111 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 49 [2020-10-27 14:07:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:53,113 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 14:07:53,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:07:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 14:07:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:07:53,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:53,114 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-27 14:07:53,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:07:53,115 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1999884642, now seen corresponding path program 2 times [2020-10-27 14:07:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:53,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465514734] [2020-10-27 14:07:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:53,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:07:58,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:07:58,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:58,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:07:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:07:58,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 14:07:58,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:58,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:58,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:07:58,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 14:07:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:58,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:58,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:07:58,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 14:07:58,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:07:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:07:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:07:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:07:58,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:58,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 14:07:58,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:58,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:07:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:07:58,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:07:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:07:58,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465514734] [2020-10-27 14:07:58,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:58,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:07:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153932604] [2020-10-27 14:07:58,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:07:58,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:07:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:07:58,416 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 11 states. [2020-10-27 14:07:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:59,233 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-10-27 14:07:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:07:59,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-27 14:07:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:59,235 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:07:59,235 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:07:59,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:07:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:07:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-10-27 14:07:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:07:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-27 14:07:59,263 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 51 [2020-10-27 14:07:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:59,265 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-27 14:07:59,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:07:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-27 14:07:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:07:59,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:59,267 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:59,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:07:59,268 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash 157062690, now seen corresponding path program 3 times [2020-10-27 14:07:59,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:59,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621235152] [2020-10-27 14:07:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:08:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:08:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:08:04,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:04,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:04,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:04,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:08:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:08:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-27 14:08:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:08:04,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:08:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:04,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:04,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:04,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:08:04,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:04,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:08:04,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:08:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:08:04,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:08:04,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:08:04,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621235152] [2020-10-27 14:08:04,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:04,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266669883] [2020-10-27 14:08:04,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:04,465 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 10 states. [2020-10-27 14:08:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:05,260 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-27 14:08:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:08:05,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-27 14:08:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:05,262 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:08:05,262 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:08:05,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:08:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:08:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2020-10-27 14:08:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:08:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-27 14:08:05,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 51 [2020-10-27 14:08:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:05,276 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-27 14:08:05,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-27 14:08:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:08:05,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:05,277 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-10-27 14:08:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:05,279 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1317560222, now seen corresponding path program 4 times [2020-10-27 14:08:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113904850] [2020-10-27 14:08:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:05,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:05,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:10,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:08:10,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:10,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:08:10,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:08:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:08:10,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:10,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:10,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:10,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:10,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:10,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:10,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:10,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:08:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:10,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:10,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:10,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 14:08:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:10,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:10,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:10,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:10,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:10,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:08:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:10,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:10,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:08:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:08:10,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:08:10,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113904850] [2020-10-27 14:08:10,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:10,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:10,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16395912] [2020-10-27 14:08:10,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:10,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:10,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:10,498 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 10 states. [2020-10-27 14:08:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:10,983 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-10-27 14:08:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:08:10,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 14:08:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:10,985 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:08:10,985 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:08:10,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:08:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-27 14:08:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:08:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-27 14:08:10,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2020-10-27 14:08:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:10,996 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-27 14:08:10,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-27 14:08:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:08:10,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:10,997 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:10,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:10,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:10,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1375984896, now seen corresponding path program 5 times [2020-10-27 14:08:10,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:10,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631763844] [2020-10-27 14:08:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:11,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:12,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:08:16,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:08:16,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:08:16,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:16,524 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 14:08:16,682 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-27 14:08:16,857 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 14:08:17,115 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-27 14:08:17,402 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-27 14:08:17,739 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-27 14:08:17,963 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-27 14:08:18,233 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 14:08:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:18,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:18,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:18,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:18,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:18,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:08:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:18,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:18,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:18,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-27 14:08:18,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:18,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:18,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:19,726 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-27 14:08:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 14:08:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:19,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:22,807 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 14:08:22,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:08:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:22,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:08:22,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 101 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:23,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631763844] [2020-10-27 14:08:23,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:23,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:08:23,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459657453] [2020-10-27 14:08:23,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:08:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:23,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:08:23,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=643, Unknown=1, NotChecked=0, Total=702 [2020-10-27 14:08:23,695 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 27 states. [2020-10-27 14:08:25,143 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 14:08:29,673 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2020-10-27 14:08:35,151 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2020-10-27 14:08:38,214 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-10-27 14:08:41,229 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-27 14:08:46,891 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-27 14:08:52,269 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-27 14:08:53,584 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2020-10-27 14:08:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:53,900 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-27 14:08:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:08:53,902 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2020-10-27 14:08:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:53,903 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:08:53,903 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:08:53,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=145, Invalid=1574, Unknown=3, NotChecked=0, Total=1722 [2020-10-27 14:08:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:08:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-10-27 14:08:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:08:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-10-27 14:08:53,922 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 57 [2020-10-27 14:08:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:53,923 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-10-27 14:08:53,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:08:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-10-27 14:08:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:08:53,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:53,927 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:53,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:53,928 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:53,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1023900066, now seen corresponding path program 6 times [2020-10-27 14:08:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322332794] [2020-10-27 14:08:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:53,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:53,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:54,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:08:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:08:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:58,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:58,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:08:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:08:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:08:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:59,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:08:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:08:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:59,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:59,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:08:59,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:08:59,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:08:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:59,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 9 proven. 114 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:08:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322332794] [2020-10-27 14:08:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:08:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394383964] [2020-10-27 14:08:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:08:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:08:59,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:08:59,211 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 13 states. [2020-10-27 14:09:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:00,298 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2020-10-27 14:09:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:09:00,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 14:09:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:00,301 INFO L225 Difference]: With dead ends: 132 [2020-10-27 14:09:00,301 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:09:00,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:09:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:09:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-27 14:09:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:09:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 14:09:00,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 59 [2020-10-27 14:09:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:00,313 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 14:09:00,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:09:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 14:09:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:09:00,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:00,314 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:00,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:09:00,314 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1035158878, now seen corresponding path program 7 times [2020-10-27 14:09:00,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:00,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007684407] [2020-10-27 14:09:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:00,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:00,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:01,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:09:05,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:09:05,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:09:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:09:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:09:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:05,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:05,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:05,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:05,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:05,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:05,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:09:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:05,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:09:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:05,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:09:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:09:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 97 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 14:09:05,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007684407] [2020-10-27 14:09:05,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:05,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:09:05,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251220619] [2020-10-27 14:09:05,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:09:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:09:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:09:05,525 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 12 states. [2020-10-27 14:09:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:06,241 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-27 14:09:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:09:06,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-27 14:09:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:06,246 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:09:06,246 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:09:06,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:09:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:09:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-27 14:09:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:09:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-27 14:09:06,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2020-10-27 14:09:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:06,266 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-27 14:09:06,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:09:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-27 14:09:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:09:06,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:06,269 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 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] [2020-10-27 14:09:06,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:09:06,269 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1393222396, now seen corresponding path program 8 times [2020-10-27 14:09:06,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:06,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029998233] [2020-10-27 14:09:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:09,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:11,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:09:11,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,123 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 14:09:12,337 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 14:09:12,547 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 14:09:12,860 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-10-27 14:09:13,263 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2020-10-27 14:09:13,579 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-10-27 14:09:13,912 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 46 [2020-10-27 14:09:16,414 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-10-27 14:09:18,910 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 106 DAG size of output: 47 [2020-10-27 14:09:21,329 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-27 14:09:30,135 WARN L193 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-27 14:09:34,675 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-27 14:09:34,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:34,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:09:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:34,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:35,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:35,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 14:09:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:09:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:09:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:36,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:09:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:36,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:36,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:09:36,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:37,856 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-27 14:09:37,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:09:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:38,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:38,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:09:38,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0