/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:37:01,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:37:01,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:37:01,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:37:01,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:37:01,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:37:01,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:37:01,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:37:01,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:37:01,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:37:01,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:37:01,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:37:01,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:37:01,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:37:01,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:37:01,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:37:01,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:37:01,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:37:01,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:37:01,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:37:01,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:37:01,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:37:01,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:37:01,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:37:01,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:37:01,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:37:01,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:37:01,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:37:01,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:37:01,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:37:01,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:37:01,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:37:01,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:37:01,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:37:01,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:37:01,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:37:01,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:37:01,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:37:01,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:37:01,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:37:01,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:37:01,521 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 20:37:01,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:37:01,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:37:01,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:37:01,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:37:01,580 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:37:01,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:37:01,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:37:01,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:37:01,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:37:01,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:37:01,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:37:01,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:37:01,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:37:01,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:37:01,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:37:01,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:37:01,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:37:01,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:37:01,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:37:01,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:37:01,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:37:01,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:37:01,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:37:01,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:37:01,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:37:01,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:37:01,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:37:01,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:37:01,999 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:37:02,000 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:37:02,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2020-10-27 20:37:02,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79281ef8/181dd67ca54a449c89e586353629b472/FLAG68b1ba05f [2020-10-27 20:37:02,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:37:02,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum_array-2.i [2020-10-27 20:37:02,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79281ef8/181dd67ca54a449c89e586353629b472/FLAG68b1ba05f [2020-10-27 20:37:03,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a79281ef8/181dd67ca54a449c89e586353629b472 [2020-10-27 20:37:03,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:37:03,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:37:03,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:03,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:37:03,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:37:03,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cfc48e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03, skipping insertion in model container [2020-10-27 20:37:03,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:37:03,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:37:03,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:03,369 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:37:03,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:37:03,414 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:37:03,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03 WrapperNode [2020-10-27 20:37:03,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:37:03,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:37:03,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:37:03,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:37:03,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (1/1) ... [2020-10-27 20:37:03,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:37:03,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:37:03,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:37:03,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:37:03,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (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 20:37:03,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:37:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:37:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:37:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:37:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:37:03,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:37:03,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:37:03,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:37:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:37:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:37:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:37:03,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:37:04,006 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:37:04,007 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 20:37:04,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:04 BoogieIcfgContainer [2020-10-27 20:37:04,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:37:04,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:37:04,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:37:04,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:37:04,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:37:03" (1/3) ... [2020-10-27 20:37:04,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a022980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:04, skipping insertion in model container [2020-10-27 20:37:04,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:37:03" (2/3) ... [2020-10-27 20:37:04,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a022980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:37:04, skipping insertion in model container [2020-10-27 20:37:04,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:37:04" (3/3) ... [2020-10-27 20:37:04,021 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.i [2020-10-27 20:37:04,033 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:37:04,038 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:37:04,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:37:04,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:37:04,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:37:04,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:37:04,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:37:04,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:37:04,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:37:04,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:37:04,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:37:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 20:37:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:37:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:04,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:04,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1848097440, now seen corresponding path program 1 times [2020-10-27 20:37:04,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:04,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085881899] [2020-10-27 20:37:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:04,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:04,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:04,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:04,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:37:04,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:37:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 20:37:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:37:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:37:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:04,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:04,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:04,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:04,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:37:04,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:04,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:04,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:04,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085881899] [2020-10-27 20:37:04,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:04,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:37:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731179340] [2020-10-27 20:37:04,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:37:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:37:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:37:04,794 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 20:37:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:04,903 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-27 20:37:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:37:04,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 20:37:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:04,913 INFO L225 Difference]: With dead ends: 62 [2020-10-27 20:37:04,913 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:37:04,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 20:37:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:37:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 20:37:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:37:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 20:37:04,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-27 20:37:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:04,956 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 20:37:04,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:37:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 20:37:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:37:04,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:04,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:04,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:37:04,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash -164598074, now seen corresponding path program 1 times [2020-10-27 20:37:04,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:04,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167352797] [2020-10-27 20:37:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:05,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:06,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:06,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:37:06,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:37:06,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1023 [2020-10-27 20:37:06,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:06,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:37:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:37:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:37:06,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:37:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:06,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:06,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:06,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:37:06,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:37:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167352797] [2020-10-27 20:37:06,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:37:06,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:37:06,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220966753] [2020-10-27 20:37:06,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:37:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:37:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:37:06,167 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 20:37:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:06,358 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-27 20:37:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:37:06,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 20:37:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:06,362 INFO L225 Difference]: With dead ends: 66 [2020-10-27 20:37:06,362 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:37:06,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:37:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:37:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-10-27 20:37:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:37:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 20:37:06,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2020-10-27 20:37:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:06,380 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 20:37:06,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:37:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 20:37:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:37:06,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:06,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:06,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:37:06,382 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1645912394, now seen corresponding path program 1 times [2020-10-27 20:37:06,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405431534] [2020-10-27 20:37:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:07,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:11,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:37:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:11,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:37:11,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:11,971 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-27 20:37:12,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:12,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:12,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:12,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:12,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:12,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:12,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:37:12,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405431534] [2020-10-27 20:37:12,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:12,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:37:12,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924653455] [2020-10-27 20:37:12,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:37:12,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:37:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:12,059 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2020-10-27 20:37:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:12,751 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-27 20:37:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:37:12,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 20:37:12,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:12,752 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:37:12,752 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:37:12,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:37:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:37:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-27 20:37:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:37:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-27 20:37:12,761 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2020-10-27 20:37:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:12,761 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-27 20:37:12,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:37:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-27 20:37:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:37:12,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:12,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:12,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:37:12,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:12,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1228065695, now seen corresponding path program 2 times [2020-10-27 20:37:12,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:12,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779619949] [2020-10-27 20:37:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:12,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:13,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:14,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:17,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:37:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:37:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:17,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:17,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:17,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:17,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:37:17,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:37:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:37:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779619949] [2020-10-27 20:37:17,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:17,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:37:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180529019] [2020-10-27 20:37:17,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:37:17,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:17,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:37:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:37:17,989 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-27 20:37:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:18,415 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-27 20:37:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:37:18,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 20:37:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:18,417 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:37:18,417 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:37:18,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:37:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:37:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-27 20:37:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:37:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-27 20:37:18,437 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 30 [2020-10-27 20:37:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:18,437 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-27 20:37:18,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:37:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-27 20:37:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:37:18,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:18,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:18,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:37:18,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1589833858, now seen corresponding path program 3 times [2020-10-27 20:37:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:18,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970175469] [2020-10-27 20:37:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:18,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:19,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:23,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:23,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:37:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:23,922 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2020-10-27 20:37:24,336 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-10-27 20:37:24,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:24,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:24,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:24,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:24,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 20:37:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970175469] [2020-10-27 20:37:24,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:24,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:37:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761997252] [2020-10-27 20:37:24,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:37:24,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:37:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:24,426 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-10-27 20:37:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:24,755 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 20:37:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:37:24,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-27 20:37:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:24,757 INFO L225 Difference]: With dead ends: 52 [2020-10-27 20:37:24,757 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:37:24,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:37:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:37:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-27 20:37:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:37:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-27 20:37:24,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2020-10-27 20:37:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:24,769 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-27 20:37:24,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:37:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-27 20:37:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:37:24,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:24,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:24,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:37:24,771 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:24,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2056319964, now seen corresponding path program 1 times [2020-10-27 20:37:24,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:24,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372905536] [2020-10-27 20:37:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:24,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:25,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:25,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:25,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:26,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:29,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:37:29,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:37:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 20:37:29,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:37:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:37:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:37:30,574 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 52 [2020-10-27 20:37:30,720 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2020-10-27 20:37:30,872 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2020-10-27 20:37:31,032 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-27 20:37:31,414 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2020-10-27 20:37:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:31,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:31,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:37:31,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 20:37:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:31,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:37:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:37:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 20:37:31,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372905536] [2020-10-27 20:37:31,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:31,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:37:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812976108] [2020-10-27 20:37:31,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:37:31,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:37:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:37:31,610 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-10-27 20:37:31,886 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-10-27 20:37:32,963 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-27 20:37:33,195 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-27 20:37:33,672 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-27 20:37:33,817 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-27 20:37:34,197 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-27 20:37:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:34,300 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-27 20:37:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:37:34,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-27 20:37:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:34,304 INFO L225 Difference]: With dead ends: 93 [2020-10-27 20:37:34,304 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 20:37:34,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:37:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 20:37:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-27 20:37:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 20:37:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-27 20:37:34,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2020-10-27 20:37:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-27 20:37:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:37:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-27 20:37:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:37:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:34,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:34,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:37:34,320 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash -184518413, now seen corresponding path program 2 times [2020-10-27 20:37:34,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:34,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019499386] [2020-10-27 20:37:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:35,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:35,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:36,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:39,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:39,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:37:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:39,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:39,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:39,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:39,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:39,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:39,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:39,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:39,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 20:37:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:39,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:39,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:37:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:37:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019499386] [2020-10-27 20:37:39,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:39,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:37:39,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419884139] [2020-10-27 20:37:39,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:37:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:37:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:39,619 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 10 states. [2020-10-27 20:37:43,793 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-27 20:37:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:44,849 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-27 20:37:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:37:44,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-27 20:37:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:44,851 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:37:44,851 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 20:37:44,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:37:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 20:37:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-10-27 20:37:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 20:37:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-27 20:37:44,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2020-10-27 20:37:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:44,866 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-27 20:37:44,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:37:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-27 20:37:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 20:37:44,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:44,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:44,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:37:44,868 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 521311200, now seen corresponding path program 3 times [2020-10-27 20:37:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:44,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058811081] [2020-10-27 20:37:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:45,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:47,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:48,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:49,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:37:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:50,302 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-10-27 20:37:50,493 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 23 [2020-10-27 20:37:50,620 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-27 20:37:50,778 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-27 20:37:51,104 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 48 [2020-10-27 20:37:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:51,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:51,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:51,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:51,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:51,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:51,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:37:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 20:37:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:37:51,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:37:51,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 20:37:51,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058811081] [2020-10-27 20:37:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:37:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857659164] [2020-10-27 20:37:51,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:37:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:51,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:37:51,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:37:51,264 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2020-10-27 20:37:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:52,016 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 20:37:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:37:52,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 20:37:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:52,018 INFO L225 Difference]: With dead ends: 68 [2020-10-27 20:37:52,018 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 20:37:52,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:37:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 20:37:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-27 20:37:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 20:37:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-27 20:37:52,034 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 51 [2020-10-27 20:37:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:52,035 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-27 20:37:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:37:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-27 20:37:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 20:37:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:52,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:52,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:37:52,037 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2142132538, now seen corresponding path program 4 times [2020-10-27 20:37:52,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:52,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143126024] [2020-10-27 20:37:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 20:37:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:57,878 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-27 20:37:58,164 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-10-27 20:37:58,412 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 41 [2020-10-27 20:37:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:58,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:58,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:58,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:58,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:58,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 20:37:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:37:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:37:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:37:58,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 20:37:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:58,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:58,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:58,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:37:58,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:37:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 20:37:58,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143126024] [2020-10-27 20:37:58,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:58,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:37:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891728947] [2020-10-27 20:37:58,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:37:58,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:37:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:37:58,602 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 14 states. [2020-10-27 20:38:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:00,103 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 20:38:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:38:00,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-27 20:38:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:00,105 INFO L225 Difference]: With dead ends: 81 [2020-10-27 20:38:00,105 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:38:00,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:38:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:38:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-27 20:38:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 20:38:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-27 20:38:00,124 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2020-10-27 20:38:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:00,125 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-27 20:38:00,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:38:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-27 20:38:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 20:38:00,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:00,126 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:00,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:38:00,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash -557570924, now seen corresponding path program 5 times [2020-10-27 20:38:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961362154] [2020-10-27 20:38:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:00,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:00,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 20:38:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 20:38:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:05,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:05,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 20:38:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:05,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:05,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 20:38:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:05,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:05,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:05,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 20:38:05,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961362154] [2020-10-27 20:38:05,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:05,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:38:05,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396933060] [2020-10-27 20:38:05,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:38:05,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:38:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:38:05,477 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 12 states. [2020-10-27 20:38:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:06,394 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-10-27 20:38:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:38:06,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-27 20:38:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:06,396 INFO L225 Difference]: With dead ends: 168 [2020-10-27 20:38:06,396 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:38:06,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:38:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:38:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-10-27 20:38:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 20:38:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-27 20:38:06,416 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2020-10-27 20:38:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:06,416 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-27 20:38:06,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:38:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-27 20:38:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:38:06,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:06,418 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:06,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:38:06,418 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2126220364, now seen corresponding path program 6 times [2020-10-27 20:38:06,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447852200] [2020-10-27 20:38:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:06,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:08,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:11,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:11,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 20:38:11,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:38:11,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:38:11,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:11,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:38:11,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:38:11,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 20:38:11,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:12,333 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2020-10-27 20:38:12,720 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 51 [2020-10-27 20:38:12,901 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-27 20:38:13,056 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-27 20:38:13,230 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-27 20:38:13,445 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-27 20:38:13,660 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-27 20:38:13,992 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2020-10-27 20:38:14,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:14,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 20:38:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:14,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:14,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:14,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:38:14,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:14,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 20:38:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:14,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:14,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:14,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:38:14,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:14,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:14,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:38:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:14,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:14,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:14,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:14,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:38:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-27 20:38:14,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447852200] [2020-10-27 20:38:14,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:14,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:38:14,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412460345] [2020-10-27 20:38:14,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:38:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:38:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:38:14,283 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 20 states. [2020-10-27 20:38:14,812 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2020-10-27 20:38:15,758 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-27 20:38:16,542 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-10-27 20:38:16,720 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-27 20:38:17,050 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-27 20:38:17,437 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-27 20:38:17,604 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 20:38:17,961 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-27 20:38:18,195 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-27 20:38:18,474 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 20:38:18,762 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 20:38:19,164 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-27 20:38:19,456 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 48 [2020-10-27 20:38:19,664 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2020-10-27 20:38:20,225 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-27 20:38:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:20,722 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2020-10-27 20:38:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:38:20,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-27 20:38:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:20,726 INFO L225 Difference]: With dead ends: 175 [2020-10-27 20:38:20,726 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 20:38:20,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:38:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 20:38:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-10-27 20:38:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 20:38:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-27 20:38:20,752 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 75 [2020-10-27 20:38:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:20,752 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-27 20:38:20,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:38:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-27 20:38:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:38:20,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:20,755 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:38:20,755 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1804799090, now seen corresponding path program 7 times [2020-10-27 20:38:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:20,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394365977] [2020-10-27 20:38:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:23,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:25,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:38:25,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:26,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:26,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:26,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:38:26,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:26,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 20:38:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:26,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:26,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:26,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 20:38:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:26,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:26,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:38:26,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:38:26,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:26,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:26,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 20:38:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:26,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:26,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:26,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:38:26,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:26,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:38:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:26,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-27 20:38:26,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394365977] [2020-10-27 20:38:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:38:26,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428206343] [2020-10-27 20:38:26,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:38:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:26,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:38:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:38:26,556 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 14 states. [2020-10-27 20:38:29,427 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-27 20:38:30,029 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2020-10-27 20:38:30,468 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-27 20:38:31,463 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2020-10-27 20:38:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:32,190 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-10-27 20:38:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:38:32,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-27 20:38:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:32,192 INFO L225 Difference]: With dead ends: 134 [2020-10-27 20:38:32,192 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:38:32,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:38:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:38:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-27 20:38:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 20:38:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-27 20:38:32,208 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 81 [2020-10-27 20:38:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:32,208 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-27 20:38:32,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:38:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-27 20:38:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 20:38:32,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:32,210 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:32,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:38:32,210 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -984959536, now seen corresponding path program 8 times [2020-10-27 20:38:32,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:32,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033817187] [2020-10-27 20:38:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:33,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:38,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:38,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 20:38:38,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:38:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5715 [2020-10-27 20:38:38,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:38:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:38:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 20:38:38,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:38,638 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 24 [2020-10-27 20:38:38,796 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-27 20:38:39,110 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 24 [2020-10-27 20:38:39,274 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-27 20:38:39,479 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-10-27 20:38:39,648 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-10-27 20:38:39,828 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-10-27 20:38:40,186 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 47 [2020-10-27 20:38:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:40,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:40,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 20:38:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:40,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:40,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:40,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:38:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:40,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:40,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:40,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:38:40,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:40,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:40,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 20:38:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:40,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:40,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 20:38:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033817187] [2020-10-27 20:38:40,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:40,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:38:40,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162932362] [2020-10-27 20:38:40,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:38:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:38:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:38:40,422 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 16 states. [2020-10-27 20:38:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:41,802 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 20:38:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:38:41,802 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-27 20:38:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:41,804 INFO L225 Difference]: With dead ends: 100 [2020-10-27 20:38:41,804 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 20:38:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:38:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 20:38:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-27 20:38:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 20:38:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-27 20:38:41,825 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 83 [2020-10-27 20:38:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:41,827 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-27 20:38:41,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:38:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-27 20:38:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 20:38:41,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:41,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:41,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:38:41,829 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1079872298, now seen corresponding path program 9 times [2020-10-27 20:38:41,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:41,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36547185] [2020-10-27 20:38:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:42,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:42,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:47,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 20:38:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:47,440 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-10-27 20:38:47,598 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 21 [2020-10-27 20:38:47,739 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 22 [2020-10-27 20:38:47,886 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 22 [2020-10-27 20:38:48,026 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 24 [2020-10-27 20:38:48,166 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2020-10-27 20:38:48,566 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2020-10-27 20:38:48,739 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-10-27 20:38:48,917 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-10-27 20:38:49,151 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-27 20:38:49,398 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-27 20:38:49,648 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:38:49,923 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:38:50,326 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2020-10-27 20:38:50,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:38:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:50,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:50,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:50,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:38:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:50,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 20:38:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:50,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:38:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:50,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:50,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 20:38:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:50,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:50,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:50,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 20:38:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:50,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:38:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:38:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:38:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 20:38:50,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36547185] [2020-10-27 20:38:50,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:38:50,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:38:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818915436] [2020-10-27 20:38:50,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:38:50,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:38:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:38:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:38:50,716 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 21 states. [2020-10-27 20:38:51,148 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-27 20:38:53,124 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-27 20:38:53,401 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 20:38:53,598 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 20:38:53,789 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 20:38:54,200 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 20:38:54,482 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 20:38:54,769 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 20:38:55,093 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-27 20:38:55,283 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-27 20:38:55,749 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 20:38:56,208 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 20:38:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:38:56,247 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2020-10-27 20:38:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:38:56,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-27 20:38:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:38:56,249 INFO L225 Difference]: With dead ends: 177 [2020-10-27 20:38:56,249 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 20:38:56,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=351, Invalid=1905, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:38:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 20:38:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 153. [2020-10-27 20:38:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 20:38:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2020-10-27 20:38:56,282 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 91 [2020-10-27 20:38:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:38:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2020-10-27 20:38:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:38:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2020-10-27 20:38:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 20:38:56,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:56,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:56,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:38:56,285 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -215226815, now seen corresponding path program 10 times [2020-10-27 20:38:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:56,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079331975] [2020-10-27 20:38:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 20:39:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:02,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:02,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 20:39:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:02,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:02,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 20:39:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:02,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:02,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:02,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:39:02,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:02,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 20:39:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:02,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:02,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 20:39:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:02,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-27 20:39:02,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079331975] [2020-10-27 20:39:02,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:02,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:39:02,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407410479] [2020-10-27 20:39:02,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:39:02,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:39:02,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:39:02,078 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 16 states. [2020-10-27 20:39:02,848 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-10-27 20:39:05,122 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-27 20:39:06,787 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 44 DAG size of output: 20 [2020-10-27 20:39:08,349 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2020-10-27 20:39:08,898 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2020-10-27 20:39:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:12,661 INFO L93 Difference]: Finished difference Result 294 states and 324 transitions. [2020-10-27 20:39:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:39:12,662 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-10-27 20:39:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:12,665 INFO L225 Difference]: With dead ends: 294 [2020-10-27 20:39:12,665 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 20:39:12,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:39:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 20:39:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 164. [2020-10-27 20:39:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 20:39:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2020-10-27 20:39:12,709 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 94 [2020-10-27 20:39:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:12,710 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2020-10-27 20:39:12,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:39:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2020-10-27 20:39:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 20:39:12,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:12,711 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:12,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:39:12,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2103614306, now seen corresponding path program 11 times [2020-10-27 20:39:12,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:12,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825194349] [2020-10-27 20:39:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:13,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:14,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:17,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:19,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6093 [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:39:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:39:19,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 20:39:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:19,521 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2020-10-27 20:39:19,648 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-10-27 20:39:19,778 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 25 [2020-10-27 20:39:20,008 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 27 [2020-10-27 20:39:20,176 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-27 20:39:20,341 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-27 20:39:20,547 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-27 20:39:20,758 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-27 20:39:20,984 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-27 20:39:21,342 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2020-10-27 20:39:21,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:21,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:39:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:21,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:21,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:21,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:39:21,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:21,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:21,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:21,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 20:39:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:21,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:21,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 20:39:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:21,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:21,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:21,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:21,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:39:21,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:21,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 20:39:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:21,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:21,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-27 20:39:21,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825194349] [2020-10-27 20:39:21,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:21,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:39:21,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439055324] [2020-10-27 20:39:21,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:39:21,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:39:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:39:21,594 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand 18 states. [2020-10-27 20:39:22,327 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-27 20:39:22,505 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 20:39:22,687 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 20:39:22,860 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-27 20:39:23,637 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 20:39:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:23,863 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-10-27 20:39:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:39:23,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-27 20:39:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:23,865 INFO L225 Difference]: With dead ends: 192 [2020-10-27 20:39:23,865 INFO L226 Difference]: Without dead ends: 188 [2020-10-27 20:39:23,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:39:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-27 20:39:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 168. [2020-10-27 20:39:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 20:39:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 179 transitions. [2020-10-27 20:39:23,898 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 179 transitions. Word has length 99 [2020-10-27 20:39:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:23,899 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 179 transitions. [2020-10-27 20:39:23,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:39:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 179 transitions. [2020-10-27 20:39:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:39:23,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:23,900 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:23,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:39:23,901 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1650149342, now seen corresponding path program 12 times [2020-10-27 20:39:23,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:23,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483938649] [2020-10-27 20:39:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:23,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:25,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 20:39:28,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 20:39:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:29,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:39:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 20:39:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:29,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:29,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 20:39:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:29,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 20:39:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:29,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-27 20:39:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:29,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:29,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:29,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:29,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:29,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:29,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:29,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 38 proven. 70 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-27 20:39:29,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483938649] [2020-10-27 20:39:29,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:29,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:39:29,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947244593] [2020-10-27 20:39:29,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:39:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:39:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:39:29,498 INFO L87 Difference]: Start difference. First operand 168 states and 179 transitions. Second operand 16 states. [2020-10-27 20:39:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:31,373 INFO L93 Difference]: Finished difference Result 252 states and 265 transitions. [2020-10-27 20:39:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:39:31,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2020-10-27 20:39:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:31,376 INFO L225 Difference]: With dead ends: 252 [2020-10-27 20:39:31,376 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:39:31,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:39:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:39:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-27 20:39:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 20:39:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-27 20:39:31,410 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 107 [2020-10-27 20:39:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:31,411 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-27 20:39:31,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:39:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-27 20:39:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 20:39:31,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:31,412 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:31,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:39:31,412 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1211646276, now seen corresponding path program 13 times [2020-10-27 20:39:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:31,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666060645] [2020-10-27 20:39:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:31,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:33,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6739 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 20:39:38,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:39,710 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 51 [2020-10-27 20:39:39,920 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-27 20:39:40,105 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-27 20:39:40,338 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-27 20:39:40,589 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-27 20:39:40,840 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-27 20:39:41,101 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-27 20:39:41,397 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-27 20:39:41,849 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 70 [2020-10-27 20:39:42,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:42,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:42,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 20:39:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:42,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 20:39:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:42,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 20:39:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:42,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:42,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 20:39:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:42,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-27 20:39:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:42,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:42,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:42,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:39:42,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:39:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:42,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:39:42,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 10 proven. 112 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-27 20:39:42,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666060645] [2020-10-27 20:39:42,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:42,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:39:42,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334597076] [2020-10-27 20:39:42,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:39:42,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:39:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:39:42,313 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 23 states. [2020-10-27 20:39:43,026 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-27 20:39:44,618 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-27 20:39:46,041 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-27 20:39:46,394 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-27 20:39:46,616 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-27 20:39:46,860 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 20:39:47,344 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-27 20:39:47,695 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 20:39:48,055 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 20:39:48,415 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-27 20:39:48,865 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-27 20:39:49,081 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-27 20:39:51,707 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-27 20:39:52,299 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 20:39:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:39:52,348 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2020-10-27 20:39:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:39:52,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-27 20:39:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:39:52,351 INFO L225 Difference]: With dead ends: 202 [2020-10-27 20:39:52,351 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 20:39:52,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=398, Invalid=2464, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:39:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 20:39:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2020-10-27 20:39:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 20:39:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 190 transitions. [2020-10-27 20:39:52,386 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 190 transitions. Word has length 107 [2020-10-27 20:39:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:39:52,386 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 190 transitions. [2020-10-27 20:39:52,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:39:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 190 transitions. [2020-10-27 20:39:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 20:39:52,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:39:52,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:39:52,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:39:52,388 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:39:52,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:39:52,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1346171949, now seen corresponding path program 14 times [2020-10-27 20:39:52,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:39:52,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304326603] [2020-10-27 20:39:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:39:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:52,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:57,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:57,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 20:39:57,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:39:57,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 20:39:57,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:39:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:39:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:39:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:39:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 20:39:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:58,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 20:39:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:58,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 20:39:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 20:39:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-27 20:39:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:39:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:39:58,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:39:58,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 20:39:58,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:39:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:39:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-27 20:39:58,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304326603] [2020-10-27 20:39:58,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:39:58,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:39:58,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668138556] [2020-10-27 20:39:58,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:39:58,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:39:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:39:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:39:58,231 INFO L87 Difference]: Start difference. First operand 178 states and 190 transitions. Second operand 18 states. [2020-10-27 20:40:01,190 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-27 20:40:02,173 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-27 20:40:03,190 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-27 20:40:13,820 WARN L193 SmtUtils]: Spent 9.75 s on a formula simplification. DAG size of input: 50 DAG size of output: 20 [2020-10-27 20:40:33,612 WARN L193 SmtUtils]: Spent 19.66 s on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-10-27 20:40:39,423 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-10-27 20:40:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:40:49,659 INFO L93 Difference]: Finished difference Result 339 states and 372 transitions. [2020-10-27 20:40:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:40:49,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 110 [2020-10-27 20:40:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:40:49,663 INFO L225 Difference]: With dead ends: 339 [2020-10-27 20:40:49,663 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 20:40:49,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:40:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 20:40:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 189. [2020-10-27 20:40:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 20:40:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 202 transitions. [2020-10-27 20:40:49,714 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 202 transitions. Word has length 110 [2020-10-27 20:40:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:40:49,714 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 202 transitions. [2020-10-27 20:40:49,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:40:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 202 transitions. [2020-10-27 20:40:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 20:40:49,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:40:49,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:40:49,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:40:49,716 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:40:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:40:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1856983488, now seen corresponding path program 15 times [2020-10-27 20:40:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:40:49,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909122717] [2020-10-27 20:40:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:40:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:40:50,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:40:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking...