/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:52:10,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:52:10,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:52:10,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:52:10,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:52:10,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:52:10,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:52:10,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:52:10,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:52:10,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:52:10,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:52:10,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:52:10,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:52:10,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:52:10,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:52:10,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:52:10,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:52:10,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:52:10,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:52:10,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:52:10,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:52:10,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:52:10,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:52:10,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:52:10,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:52:10,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:52:10,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:52:10,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:52:10,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:52:10,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:52:10,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:52:10,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:52:10,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:52:10,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:52:10,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:52:10,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:52:10,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:52:10,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:52:10,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:52:10,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:52:10,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:52:10,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:52:10,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:52:10,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:52:10,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:52:10,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:52:10,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:52:10,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:52:10,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:52:10,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:52:10,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:52:10,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:52:10,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:52:10,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:52:10,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:52:10,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:52:10,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:52:10,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:52:10,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:52:10,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:52:10,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:52:10,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:52:10,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:52:10,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:52:10,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:52:10,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:52:10,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:52:10,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:52:10,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:52:10,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:52:10,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:52:10,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:52:11,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:52:11,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:52:11,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:52:11,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:52:11,135 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:52:11,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2020-10-27 14:52:11,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad78ae5e8/8a40e8131859438fbbdbeda536db909f/FLAG0c31a0449 [2020-10-27 14:52:11,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:52:11,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr4.c [2020-10-27 14:52:11,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad78ae5e8/8a40e8131859438fbbdbeda536db909f/FLAG0c31a0449 [2020-10-27 14:52:12,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad78ae5e8/8a40e8131859438fbbdbeda536db909f [2020-10-27 14:52:12,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:52:12,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:52:12,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:52:12,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:52:12,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:52:12,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262328f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12, skipping insertion in model container [2020-10-27 14:52:12,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:52:12,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:52:12,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:52:12,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:52:12,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:52:12,536 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:52:12,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12 WrapperNode [2020-10-27 14:52:12,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:52:12,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:52:12,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:52:12,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:52:12,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... [2020-10-27 14:52:12,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:52:12,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:52:12,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:52:12,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:52:12,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:52:12,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:52:12,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:52:12,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:52:12,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:52:12,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:52:12,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:52:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:52:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:52:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:52:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:52:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:52:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:52:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:52:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:52:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:52:13,460 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:52:13,461 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:52:13,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:52:13 BoogieIcfgContainer [2020-10-27 14:52:13,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:52:13,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:52:13,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:52:13,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:52:13,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:52:12" (1/3) ... [2020-10-27 14:52:13,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3a0f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:52:13, skipping insertion in model container [2020-10-27 14:52:13,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:12" (2/3) ... [2020-10-27 14:52:13,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3a0f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:52:13, skipping insertion in model container [2020-10-27 14:52:13,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:52:13" (3/3) ... [2020-10-27 14:52:13,478 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2020-10-27 14:52:13,491 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:52:13,497 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:52:13,512 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:52:13,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:52:13,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:52:13,540 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:52:13,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:52:13,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:52:13,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:52:13,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:52:13,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:52:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-27 14:52:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:52:13,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:13,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:13,568 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1384398134, now seen corresponding path program 1 times [2020-10-27 14:52:13,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:13,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814784646] [2020-10-27 14:52:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:52:14,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:52:14,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-27 14:52:14,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:52:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:52:14,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:14,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:52:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:14,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:14,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:52:14,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:14,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:14,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:14,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:14,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:14,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:14,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:52:14,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:14,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:14,608 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 14:52:14,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814784646] [2020-10-27 14:52:14,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:52:14,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:52:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779248403] [2020-10-27 14:52:14,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:52:14,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:52:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:52:14,637 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 6 states. [2020-10-27 14:52:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:14,957 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-10-27 14:52:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:52:14,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 14:52:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:14,968 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:52:14,968 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:52:14,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:52:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 14:52:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:52:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-27 14:52:15,023 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2020-10-27 14:52:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:15,023 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-27 14:52:15,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:52:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-27 14:52:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:52:15,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:15,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:52:15,026 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2007513386, now seen corresponding path program 1 times [2020-10-27 14:52:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:15,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861233215] [2020-10-27 14:52:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:15,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:16,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:52:20,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:52:20,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:52:20,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:20,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:20,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:20,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:20,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:52:20,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:52:20,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:52:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,258 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 14:52:20,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861233215] [2020-10-27 14:52:20,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:52:20,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 14:52:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094406592] [2020-10-27 14:52:20,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:52:20,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:52:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:52:20,263 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 9 states. [2020-10-27 14:52:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:20,998 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2020-10-27 14:52:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:52:20,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 14:52:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:21,003 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:52:21,004 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:52:21,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:52:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2020-10-27 14:52:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:52:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-27 14:52:21,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2020-10-27 14:52:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:21,023 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-27 14:52:21,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:52:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-27 14:52:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:52:21,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:21,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:21,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:52:21,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1881392450, now seen corresponding path program 1 times [2020-10-27 14:52:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:21,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899741847] [2020-10-27 14:52:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:21,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:21,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:22,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:24,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:52:26,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:52:26,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:52:26,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:52:26,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:52:26,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:52:26,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:26,355 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 14:52:26,767 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-10-27 14:52:26,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:26,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:52:26,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:26,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:52:27,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899741847] [2020-10-27 14:52:27,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:27,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:52:27,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760249820] [2020-10-27 14:52:27,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:52:27,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:52:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:27,009 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-27 14:52:27,761 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-27 14:52:28,030 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 14:52:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:29,523 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2020-10-27 14:52:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:52:29,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 14:52:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:29,526 INFO L225 Difference]: With dead ends: 138 [2020-10-27 14:52:29,526 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:52:29,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:52:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:52:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2020-10-27 14:52:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:52:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2020-10-27 14:52:29,552 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 45 [2020-10-27 14:52:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:29,553 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2020-10-27 14:52:29,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:52:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2020-10-27 14:52:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:52:29,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:29,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:29,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:52:29,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1904024704, now seen corresponding path program 1 times [2020-10-27 14:52:29,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:29,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547957148] [2020-10-27 14:52:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:29,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:29,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:30,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:30,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:33,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:34,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:34,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:52:34,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:52:34,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:52:34,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:52:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:52:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:52:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:35,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:35,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:35,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:35,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:35,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:35,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:35,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:35,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:35,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:35,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:35,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:35,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:52:35,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:35,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:52:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:52:35,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547957148] [2020-10-27 14:52:35,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:35,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:52:35,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157481105] [2020-10-27 14:52:35,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:52:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:52:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:35,419 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 13 states. [2020-10-27 14:52:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:37,833 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2020-10-27 14:52:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:52:37,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 14:52:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:37,838 INFO L225 Difference]: With dead ends: 201 [2020-10-27 14:52:37,838 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 14:52:37,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:52:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 14:52:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 126. [2020-10-27 14:52:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 14:52:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2020-10-27 14:52:37,869 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 45 [2020-10-27 14:52:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:37,869 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2020-10-27 14:52:37,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:52:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2020-10-27 14:52:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:52:37,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:37,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:37,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:52:37,875 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1105832303, now seen corresponding path program 1 times [2020-10-27 14:52:37,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:37,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776284136] [2020-10-27 14:52:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:40,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:42,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:52:42,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:52:42,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:52:42,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:52:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:52:42,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:52:42,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:43,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:43,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:43,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:43,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:43,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:43,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:43,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:52:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:43,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:52:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:43,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776284136] [2020-10-27 14:52:43,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:43,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:52:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475693714] [2020-10-27 14:52:43,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:52:43,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:52:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:43,907 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand 16 states. [2020-10-27 14:52:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:46,856 INFO L93 Difference]: Finished difference Result 310 states and 409 transitions. [2020-10-27 14:52:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:52:46,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-27 14:52:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:46,861 INFO L225 Difference]: With dead ends: 310 [2020-10-27 14:52:46,861 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 14:52:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:52:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 14:52:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2020-10-27 14:52:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 14:52:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 292 transitions. [2020-10-27 14:52:46,903 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 292 transitions. Word has length 54 [2020-10-27 14:52:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:46,904 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 292 transitions. [2020-10-27 14:52:46,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:52:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 292 transitions. [2020-10-27 14:52:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:52:46,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:46,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:46,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:52:46,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1178218861, now seen corresponding path program 1 times [2020-10-27 14:52:46,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:46,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027472552] [2020-10-27 14:52:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:49,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:51,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:52:51,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:52:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:52,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:52,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:52,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:52,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:52:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:52:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:52,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:53,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027472552] [2020-10-27 14:52:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:52:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324081925] [2020-10-27 14:52:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:52:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:52:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:52:53,022 INFO L87 Difference]: Start difference. First operand 223 states and 292 transitions. Second operand 18 states. [2020-10-27 14:52:54,568 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-27 14:52:55,406 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 14:52:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:57,245 INFO L93 Difference]: Finished difference Result 378 states and 501 transitions. [2020-10-27 14:52:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:52:57,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-27 14:52:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:57,249 INFO L225 Difference]: With dead ends: 378 [2020-10-27 14:52:57,249 INFO L226 Difference]: Without dead ends: 361 [2020-10-27 14:52:57,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=474, Invalid=1878, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:52:57,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-27 14:52:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 252. [2020-10-27 14:52:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 14:52:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2020-10-27 14:52:57,290 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 54 [2020-10-27 14:52:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:57,290 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2020-10-27 14:52:57,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:52:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2020-10-27 14:52:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:52:57,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:57,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:57,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:52:57,293 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1836884757, now seen corresponding path program 1 times [2020-10-27 14:52:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:57,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050994697] [2020-10-27 14:52:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:57,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:58,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:00,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:53:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:53:02,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:53:02,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:02,600 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 14:53:03,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:03,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:03,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:03,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:03,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:03,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:53:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:03,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:53:03,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050994697] [2020-10-27 14:53:03,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:03,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:53:03,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689280276] [2020-10-27 14:53:03,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:53:03,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:53:03,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:53:03,140 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand 16 states. [2020-10-27 14:53:03,589 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-27 14:53:04,061 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 14:53:04,268 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-27 14:53:05,624 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 14:53:05,816 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-27 14:53:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:06,035 INFO L93 Difference]: Finished difference Result 369 states and 489 transitions. [2020-10-27 14:53:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:53:06,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-27 14:53:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:06,041 INFO L225 Difference]: With dead ends: 369 [2020-10-27 14:53:06,042 INFO L226 Difference]: Without dead ends: 366 [2020-10-27 14:53:06,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:53:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-27 14:53:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 303. [2020-10-27 14:53:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-27 14:53:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 401 transitions. [2020-10-27 14:53:06,102 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 401 transitions. Word has length 54 [2020-10-27 14:53:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:06,104 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 401 transitions. [2020-10-27 14:53:06,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:53:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 401 transitions. [2020-10-27 14:53:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:53:06,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:06,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:06,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:53:06,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1595267245, now seen corresponding path program 2 times [2020-10-27 14:53:06,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:06,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309200092] [2020-10-27 14:53:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:06,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:53:11,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:53:11,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:53:11,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:11,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:11,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:11,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:11,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:11,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:11,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:11,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:11,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:11,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:11,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:11,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:11,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:11,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:53:11,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309200092] [2020-10-27 14:53:11,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:11,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:53:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153009338] [2020-10-27 14:53:11,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:53:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:53:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:53:11,357 INFO L87 Difference]: Start difference. First operand 303 states and 401 transitions. Second operand 8 states. [2020-10-27 14:53:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:12,160 INFO L93 Difference]: Finished difference Result 576 states and 758 transitions. [2020-10-27 14:53:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:53:12,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 14:53:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:12,164 INFO L225 Difference]: With dead ends: 576 [2020-10-27 14:53:12,164 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 14:53:12,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:53:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 14:53:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2020-10-27 14:53:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-27 14:53:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 355 transitions. [2020-10-27 14:53:12,202 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 355 transitions. Word has length 57 [2020-10-27 14:53:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:12,203 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 355 transitions. [2020-10-27 14:53:12,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:53:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 355 transitions. [2020-10-27 14:53:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:53:12,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:12,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:12,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:53:12,205 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 143841310, now seen corresponding path program 2 times [2020-10-27 14:53:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607252213] [2020-10-27 14:53:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:12,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:53:17,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:53:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:53:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:53:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:53:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:17,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:17,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:17,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:17,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:17,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:17,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:17,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:53:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:17,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:17,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:17,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:53:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:17,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607252213] [2020-10-27 14:53:17,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:17,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:53:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775337585] [2020-10-27 14:53:17,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:53:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:53:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:53:17,983 INFO L87 Difference]: Start difference. First operand 283 states and 355 transitions. Second operand 15 states. [2020-10-27 14:53:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:20,323 INFO L93 Difference]: Finished difference Result 498 states and 631 transitions. [2020-10-27 14:53:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:53:20,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-27 14:53:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:20,328 INFO L225 Difference]: With dead ends: 498 [2020-10-27 14:53:20,328 INFO L226 Difference]: Without dead ends: 481 [2020-10-27 14:53:20,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:53:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-27 14:53:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 409. [2020-10-27 14:53:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-27 14:53:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 513 transitions. [2020-10-27 14:53:20,389 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 513 transitions. Word has length 63 [2020-10-27 14:53:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:20,389 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 513 transitions. [2020-10-27 14:53:20,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:53:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 513 transitions. [2020-10-27 14:53:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:53:20,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:20,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:20,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:53:20,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash -250525476, now seen corresponding path program 1 times [2020-10-27 14:53:20,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:20,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943412927] [2020-10-27 14:53:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:24,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:53:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:53:25,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:53:25,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:25,703 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 14:53:26,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:26,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:26,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:26,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:26,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:26,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:26,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:26,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:26,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:53:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:26,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:53:26,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:53:26,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:26,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:53:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:53:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943412927] [2020-10-27 14:53:26,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:26,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:53:26,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262697106] [2020-10-27 14:53:26,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:53:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:53:26,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:53:26,929 INFO L87 Difference]: Start difference. First operand 409 states and 513 transitions. Second operand 22 states. [2020-10-27 14:53:27,444 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 14:53:28,361 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 14:53:28,962 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-27 14:53:29,198 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-27 14:53:29,816 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2020-10-27 14:53:30,302 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-27 14:53:30,589 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-27 14:53:30,725 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 14:53:30,957 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-27 14:53:31,150 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2020-10-27 14:53:31,447 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 14:53:31,956 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-27 14:53:32,219 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-27 14:53:32,445 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-27 14:53:32,729 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-27 14:53:33,040 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-27 14:53:33,299 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-27 14:53:33,528 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-27 14:53:33,857 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 14:53:34,327 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 14:53:34,675 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 14:53:35,026 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-27 14:53:35,417 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 14:53:36,147 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 14:53:36,561 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-27 14:53:37,099 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-27 14:53:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:37,140 INFO L93 Difference]: Finished difference Result 550 states and 705 transitions. [2020-10-27 14:53:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:53:37,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-27 14:53:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:37,147 INFO L225 Difference]: With dead ends: 550 [2020-10-27 14:53:37,147 INFO L226 Difference]: Without dead ends: 533 [2020-10-27 14:53:37,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=980, Invalid=3576, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 14:53:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-27 14:53:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 418. [2020-10-27 14:53:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-27 14:53:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 525 transitions. [2020-10-27 14:53:37,230 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 525 transitions. Word has length 63 [2020-10-27 14:53:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:37,230 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 525 transitions. [2020-10-27 14:53:37,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:53:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 525 transitions. [2020-10-27 14:53:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:53:37,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:37,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:37,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:53:37,233 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash -384538982, now seen corresponding path program 2 times [2020-10-27 14:53:37,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:37,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103800042] [2020-10-27 14:53:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:37,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:40,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:41,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:41,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:53:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:53:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:53:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:42,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:53:42,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:53:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:42,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:53:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:43,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103800042] [2020-10-27 14:53:43,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:43,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:53:43,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519527624] [2020-10-27 14:53:43,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:53:43,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:43,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:53:43,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:43,013 INFO L87 Difference]: Start difference. First operand 418 states and 525 transitions. Second operand 17 states. [2020-10-27 14:53:43,635 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 14:53:44,179 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-27 14:53:45,460 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-27 14:53:45,641 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-27 14:53:45,938 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-27 14:53:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:46,442 INFO L93 Difference]: Finished difference Result 514 states and 650 transitions. [2020-10-27 14:53:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:53:46,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-10-27 14:53:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:46,448 INFO L225 Difference]: With dead ends: 514 [2020-10-27 14:53:46,448 INFO L226 Difference]: Without dead ends: 511 [2020-10-27 14:53:46,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:53:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-27 14:53:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 443. [2020-10-27 14:53:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-27 14:53:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 556 transitions. [2020-10-27 14:53:46,518 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 556 transitions. Word has length 63 [2020-10-27 14:53:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:46,518 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 556 transitions. [2020-10-27 14:53:46,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:53:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 556 transitions. [2020-10-27 14:53:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:53:46,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:46,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:46,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:53:46,521 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1093689690, now seen corresponding path program 3 times [2020-10-27 14:53:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:46,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239487145] [2020-10-27 14:53:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:47,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:53:51,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:51,851 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-27 14:53:52,789 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2020-10-27 14:53:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:53,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:53,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:53,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:53,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:53,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:53,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:53,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:53,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:53,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:53,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:53,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:53,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:53,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239487145] [2020-10-27 14:53:53,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:53,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:53:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683961977] [2020-10-27 14:53:53,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:53:53,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:53:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:53:53,324 INFO L87 Difference]: Start difference. First operand 443 states and 556 transitions. Second operand 20 states. [2020-10-27 14:53:54,343 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-27 14:53:54,503 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-27 14:53:57,171 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 14:53:57,792 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 14:53:59,512 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-27 14:53:59,718 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 14:54:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:00,625 INFO L93 Difference]: Finished difference Result 1237 states and 1588 transitions. [2020-10-27 14:54:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 14:54:00,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-27 14:54:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:00,633 INFO L225 Difference]: With dead ends: 1237 [2020-10-27 14:54:00,633 INFO L226 Difference]: Without dead ends: 1072 [2020-10-27 14:54:00,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=507, Invalid=2685, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:54:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-10-27 14:54:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 523. [2020-10-27 14:54:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-27 14:54:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 664 transitions. [2020-10-27 14:54:00,724 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 664 transitions. Word has length 61 [2020-10-27 14:54:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:00,724 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 664 transitions. [2020-10-27 14:54:00,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:54:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 664 transitions. [2020-10-27 14:54:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:54:00,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:00,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:00,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:54:00,727 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:00,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1273004904, now seen corresponding path program 1 times [2020-10-27 14:54:00,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:00,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553327923] [2020-10-27 14:54:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:00,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:00,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:54:00,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:01,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:01,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:01,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:01,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:01,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:54:01,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:01,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:01,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:01,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:01,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:01,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:54:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553327923] [2020-10-27 14:54:01,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:54:01,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:54:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578120589] [2020-10-27 14:54:01,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:54:01,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:54:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:01,069 INFO L87 Difference]: Start difference. First operand 523 states and 664 transitions. Second operand 4 states. [2020-10-27 14:54:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:01,268 INFO L93 Difference]: Finished difference Result 730 states and 920 transitions. [2020-10-27 14:54:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:54:01,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 14:54:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:01,275 INFO L225 Difference]: With dead ends: 730 [2020-10-27 14:54:01,275 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 14:54:01,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 14:54:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-27 14:54:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 14:54:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2020-10-27 14:54:01,327 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 61 [2020-10-27 14:54:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:01,327 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2020-10-27 14:54:01,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:54:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2020-10-27 14:54:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:54:01,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:01,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:01,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:54:01,329 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1024858410, now seen corresponding path program 2 times [2020-10-27 14:54:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:01,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371745504] [2020-10-27 14:54:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:06,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:54:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:54:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:54:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:06,706 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-27 14:54:06,851 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-27 14:54:07,193 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-27 14:54:07,342 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-10-27 14:54:08,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:08,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:08,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:08,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:54:08,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371745504] [2020-10-27 14:54:08,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:08,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:54:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856800266] [2020-10-27 14:54:08,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:54:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:54:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:54:08,174 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand 18 states. [2020-10-27 14:54:09,071 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-27 14:54:09,290 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 14:54:09,683 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-27 14:54:09,973 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-27 14:54:10,517 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-27 14:54:11,313 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-27 14:54:11,660 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 14:54:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:14,112 INFO L93 Difference]: Finished difference Result 542 states and 676 transitions. [2020-10-27 14:54:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:54:14,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-27 14:54:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:14,116 INFO L225 Difference]: With dead ends: 542 [2020-10-27 14:54:14,117 INFO L226 Difference]: Without dead ends: 525 [2020-10-27 14:54:14,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:54:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-27 14:54:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 319. [2020-10-27 14:54:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-27 14:54:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 400 transitions. [2020-10-27 14:54:14,185 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 400 transitions. Word has length 61 [2020-10-27 14:54:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:14,185 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 400 transitions. [2020-10-27 14:54:14,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:54:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 400 transitions. [2020-10-27 14:54:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:54:14,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:14,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:14,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:54:14,187 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 216183599, now seen corresponding path program 1 times [2020-10-27 14:54:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:14,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041263546] [2020-10-27 14:54:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:14,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:16,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:16,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:54:19,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:54:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:54:19,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:19,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:19,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:19,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:19,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:19,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:19,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:54:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:19,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:54:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:54:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:54:19,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041263546] [2020-10-27 14:54:19,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:19,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:54:19,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138059947] [2020-10-27 14:54:19,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:54:19,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:54:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:54:19,482 INFO L87 Difference]: Start difference. First operand 319 states and 400 transitions. Second operand 13 states. [2020-10-27 14:54:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:21,096 INFO L93 Difference]: Finished difference Result 530 states and 670 transitions. [2020-10-27 14:54:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:54:21,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 14:54:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:21,101 INFO L225 Difference]: With dead ends: 530 [2020-10-27 14:54:21,101 INFO L226 Difference]: Without dead ends: 527 [2020-10-27 14:54:21,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:54:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-27 14:54:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 447. [2020-10-27 14:54:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-27 14:54:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 564 transitions. [2020-10-27 14:54:21,207 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 564 transitions. Word has length 72 [2020-10-27 14:54:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:21,208 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 564 transitions. [2020-10-27 14:54:21,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:54:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 564 transitions. [2020-10-27 14:54:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:54:21,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:21,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:21,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:54:21,211 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2061550765, now seen corresponding path program 1 times [2020-10-27 14:54:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:21,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911230949] [2020-10-27 14:54:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:54:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:26,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:26,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:26,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:26,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:26,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:26,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:26,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:54:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:26,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:54:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:26,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:26,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:26,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:54:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:26,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:26,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:26,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:26,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:26,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:26,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:54:26,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911230949] [2020-10-27 14:54:26,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:26,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:54:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070440020] [2020-10-27 14:54:26,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:54:26,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:54:26,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:54:26,451 INFO L87 Difference]: Start difference. First operand 447 states and 564 transitions. Second operand 11 states. [2020-10-27 14:54:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:27,636 INFO L93 Difference]: Finished difference Result 599 states and 757 transitions. [2020-10-27 14:54:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:54:27,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 14:54:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:27,641 INFO L225 Difference]: With dead ends: 599 [2020-10-27 14:54:27,641 INFO L226 Difference]: Without dead ends: 568 [2020-10-27 14:54:27,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:54:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-27 14:54:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 482. [2020-10-27 14:54:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-27 14:54:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 613 transitions. [2020-10-27 14:54:27,765 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 613 transitions. Word has length 72 [2020-10-27 14:54:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:27,766 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 613 transitions. [2020-10-27 14:54:27,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:54:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 613 transitions. [2020-10-27 14:54:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:54:27,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:27,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:27,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:54:27,769 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1763928800, now seen corresponding path program 3 times [2020-10-27 14:54:27,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:27,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919272370] [2020-10-27 14:54:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:27,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:28,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:28,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:30,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:31,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:32,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:33,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5503 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:54:33,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:33,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:33,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:33,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:33,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:33,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:33,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:33,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:33,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:33,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:33,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:33,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:54:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919272370] [2020-10-27 14:54:33,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:33,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:54:33,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998300617] [2020-10-27 14:54:33,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:54:33,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:54:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:54:33,513 INFO L87 Difference]: Start difference. First operand 482 states and 613 transitions. Second operand 10 states. [2020-10-27 14:54:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:35,162 INFO L93 Difference]: Finished difference Result 1001 states and 1280 transitions. [2020-10-27 14:54:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:54:35,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-27 14:54:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:35,169 INFO L225 Difference]: With dead ends: 1001 [2020-10-27 14:54:35,169 INFO L226 Difference]: Without dead ends: 668 [2020-10-27 14:54:35,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:54:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-27 14:54:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 540. [2020-10-27 14:54:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-27 14:54:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 677 transitions. [2020-10-27 14:54:35,332 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 677 transitions. Word has length 69 [2020-10-27 14:54:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:35,332 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 677 transitions. [2020-10-27 14:54:35,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:54:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 677 transitions. [2020-10-27 14:54:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:54:35,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:35,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:35,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:54:35,335 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1609436763, now seen corresponding path program 2 times [2020-10-27 14:54:35,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:35,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103521718] [2020-10-27 14:54:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:36,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:36,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:36,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:54:40,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:40,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:40,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:40,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:54:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:40,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:40,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:54:40,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103521718] [2020-10-27 14:54:40,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:40,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:54:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933037247] [2020-10-27 14:54:40,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:54:40,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:54:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:54:40,924 INFO L87 Difference]: Start difference. First operand 540 states and 677 transitions. Second operand 10 states. [2020-10-27 14:54:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:42,161 INFO L93 Difference]: Finished difference Result 1335 states and 1696 transitions. [2020-10-27 14:54:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:54:42,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-27 14:54:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:42,168 INFO L225 Difference]: With dead ends: 1335 [2020-10-27 14:54:42,168 INFO L226 Difference]: Without dead ends: 953 [2020-10-27 14:54:42,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:54:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-10-27 14:54:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 729. [2020-10-27 14:54:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2020-10-27 14:54:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 917 transitions. [2020-10-27 14:54:42,386 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 917 transitions. Word has length 70 [2020-10-27 14:54:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:42,387 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 917 transitions. [2020-10-27 14:54:42,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:54:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 917 transitions. [2020-10-27 14:54:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:54:42,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:42,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:42,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:54:42,391 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -715950425, now seen corresponding path program 1 times [2020-10-27 14:54:42,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:42,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523214681] [2020-10-27 14:54:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:42,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:54:42,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 14:54:42,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:54:42,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:54:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:42,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:42,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:42,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:54:42,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:42,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:42,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:42,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:42,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:42,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:54:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:42,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:54:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:54:42,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523214681] [2020-10-27 14:54:42,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:54:42,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:54:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305523002] [2020-10-27 14:54:42,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:54:42,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:54:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:42,721 INFO L87 Difference]: Start difference. First operand 729 states and 917 transitions. Second operand 4 states. [2020-10-27 14:54:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:43,118 INFO L93 Difference]: Finished difference Result 1163 states and 1478 transitions. [2020-10-27 14:54:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:54:43,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 14:54:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:43,124 INFO L225 Difference]: With dead ends: 1163 [2020-10-27 14:54:43,124 INFO L226 Difference]: Without dead ends: 789 [2020-10-27 14:54:43,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-10-27 14:54:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 692. [2020-10-27 14:54:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-10-27 14:54:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 864 transitions. [2020-10-27 14:54:43,336 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 864 transitions. Word has length 70 [2020-10-27 14:54:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:43,336 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 864 transitions. [2020-10-27 14:54:43,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:54:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 864 transitions. [2020-10-27 14:54:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:54:43,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:43,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:43,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:54:43,339 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash -292303703, now seen corresponding path program 1 times [2020-10-27 14:54:43,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:43,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336625136] [2020-10-27 14:54:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:45,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:46,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:46,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:48,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:48,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:54:48,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:54:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:54:48,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:54:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:54:48,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:54:48,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:48,774 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-27 14:54:48,992 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 14:54:49,189 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 14:54:49,458 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-27 14:54:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:49,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:49,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:49,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:49,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:49,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:49,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:49,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:49,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:54:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:54:49,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336625136] [2020-10-27 14:54:49,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:49,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:54:49,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051871634] [2020-10-27 14:54:49,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:54:49,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:54:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:54:49,820 INFO L87 Difference]: Start difference. First operand 692 states and 864 transitions. Second operand 18 states. [2020-10-27 14:54:50,242 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 14:54:50,562 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 14:54:50,863 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-27 14:54:51,241 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 14:54:51,588 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-27 14:54:51,849 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-27 14:54:52,362 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-27 14:54:52,568 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 14:54:52,911 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-27 14:54:53,517 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-27 14:54:54,443 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-27 14:54:54,684 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 14:54:54,921 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-27 14:54:55,344 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-27 14:54:56,052 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-27 14:54:56,264 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-27 14:54:56,580 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-27 14:54:56,839 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-27 14:54:57,033 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-27 14:54:57,354 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 14:54:57,534 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-27 14:54:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:58,721 INFO L93 Difference]: Finished difference Result 1072 states and 1364 transitions. [2020-10-27 14:54:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 14:54:58,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-27 14:54:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:58,728 INFO L225 Difference]: With dead ends: 1072 [2020-10-27 14:54:58,729 INFO L226 Difference]: Without dead ends: 1069 [2020-10-27 14:54:58,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=438, Invalid=2754, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:54:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-10-27 14:54:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 747. [2020-10-27 14:54:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-10-27 14:54:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 935 transitions. [2020-10-27 14:54:58,941 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 935 transitions. Word has length 70 [2020-10-27 14:54:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:58,941 INFO L481 AbstractCegarLoop]: Abstraction has 747 states and 935 transitions. [2020-10-27 14:54:58,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:54:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 935 transitions. [2020-10-27 14:54:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:54:58,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:58,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:58,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:54:58,945 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2066410727, now seen corresponding path program 4 times [2020-10-27 14:54:58,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976483860] [2020-10-27 14:54:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:58,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:59,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:03,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:55:03,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:55:03,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:55:03,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:04,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:04,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:04,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:04,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:04,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:04,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-27 14:55:04,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976483860] [2020-10-27 14:55:04,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:04,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:55:04,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089020930] [2020-10-27 14:55:04,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:55:04,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:55:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:55:04,277 INFO L87 Difference]: Start difference. First operand 747 states and 935 transitions. Second operand 10 states. [2020-10-27 14:55:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:06,114 INFO L93 Difference]: Finished difference Result 1007 states and 1273 transitions. [2020-10-27 14:55:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:55:06,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-27 14:55:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:06,120 INFO L225 Difference]: With dead ends: 1007 [2020-10-27 14:55:06,120 INFO L226 Difference]: Without dead ends: 692 [2020-10-27 14:55:06,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:55:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-27 14:55:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 616. [2020-10-27 14:55:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-27 14:55:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 756 transitions. [2020-10-27 14:55:06,291 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 756 transitions. Word has length 73 [2020-10-27 14:55:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:06,291 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 756 transitions. [2020-10-27 14:55:06,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:55:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 756 transitions. [2020-10-27 14:55:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:55:06,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:06,294 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:06,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:55:06,294 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash -918434496, now seen corresponding path program 3 times [2020-10-27 14:55:06,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:06,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928464806] [2020-10-27 14:55:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:06,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:06,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:06,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:10,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:10,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:10,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:55:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:55:11,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:11,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:11,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:55:11,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 14:55:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:55:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:11,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:11,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:11,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:55:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:11,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:55:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:11,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:11,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:11,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:11,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:11,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:11,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:55:11,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928464806] [2020-10-27 14:55:11,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:11,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:55:11,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625822119] [2020-10-27 14:55:11,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:55:11,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:55:11,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:55:11,648 INFO L87 Difference]: Start difference. First operand 616 states and 756 transitions. Second operand 14 states. [2020-10-27 14:55:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:13,553 INFO L93 Difference]: Finished difference Result 655 states and 805 transitions. [2020-10-27 14:55:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:55:13,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-27 14:55:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:13,560 INFO L225 Difference]: With dead ends: 655 [2020-10-27 14:55:13,560 INFO L226 Difference]: Without dead ends: 454 [2020-10-27 14:55:13,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:55:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-27 14:55:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2020-10-27 14:55:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-27 14:55:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 485 transitions. [2020-10-27 14:55:13,689 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 485 transitions. Word has length 81 [2020-10-27 14:55:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:13,689 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 485 transitions. [2020-10-27 14:55:13,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:55:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 485 transitions. [2020-10-27 14:55:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:55:13,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:13,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:13,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:55:13,692 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1103989878, now seen corresponding path program 4 times [2020-10-27 14:55:13,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:13,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648932096] [2020-10-27 14:55:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:13,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:15,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:16,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:18,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:18,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:55:18,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:55:18,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:55:18,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:55:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:55:18,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:55:18,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:19,022 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2020-10-27 14:55:19,161 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2020-10-27 14:55:19,368 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2020-10-27 14:55:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:20,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:20,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:20,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:20,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:20,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:20,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:20,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:20,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:20,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:20,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:20,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:20,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:20,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:20,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:20,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:55:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:20,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:20,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:20,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 14:55:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:20,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:20,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:20,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:20,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:20,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:55:20,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648932096] [2020-10-27 14:55:20,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:20,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:55:20,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286559595] [2020-10-27 14:55:20,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:55:20,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:20,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:55:20,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:55:20,181 INFO L87 Difference]: Start difference. First operand 396 states and 485 transitions. Second operand 18 states. [2020-10-27 14:55:20,949 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 14:55:21,509 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 14:55:21,792 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-27 14:55:21,999 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-27 14:55:22,303 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-27 14:55:22,785 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-27 14:55:23,123 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-27 14:55:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:25,316 INFO L93 Difference]: Finished difference Result 1079 states and 1348 transitions. [2020-10-27 14:55:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:55:25,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-27 14:55:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:25,322 INFO L225 Difference]: With dead ends: 1079 [2020-10-27 14:55:25,322 INFO L226 Difference]: Without dead ends: 780 [2020-10-27 14:55:25,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:55:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-27 14:55:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 524. [2020-10-27 14:55:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-27 14:55:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 634 transitions. [2020-10-27 14:55:25,476 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 634 transitions. Word has length 79 [2020-10-27 14:55:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:25,477 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 634 transitions. [2020-10-27 14:55:25,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:55:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 634 transitions. [2020-10-27 14:55:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:55:25,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:25,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:25,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:55:25,479 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1141589576, now seen corresponding path program 1 times [2020-10-27 14:55:25,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:25,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974100378] [2020-10-27 14:55:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:25,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:55:25,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:25,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:25,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:25,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:25,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:25,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:25,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:25,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:25,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:55:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:25,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 14:55:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:25,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:25,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-27 14:55:25,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974100378] [2020-10-27 14:55:25,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:55:25,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:55:25,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338165613] [2020-10-27 14:55:25,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:55:25,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:55:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:55:25,785 INFO L87 Difference]: Start difference. First operand 524 states and 634 transitions. Second operand 4 states. [2020-10-27 14:55:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:26,184 INFO L93 Difference]: Finished difference Result 975 states and 1212 transitions. [2020-10-27 14:55:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:55:26,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-27 14:55:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:26,188 INFO L225 Difference]: With dead ends: 975 [2020-10-27 14:55:26,188 INFO L226 Difference]: Without dead ends: 676 [2020-10-27 14:55:26,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:55:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-10-27 14:55:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 524. [2020-10-27 14:55:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-27 14:55:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 628 transitions. [2020-10-27 14:55:26,368 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 628 transitions. Word has length 79 [2020-10-27 14:55:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:26,368 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 628 transitions. [2020-10-27 14:55:26,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:55:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 628 transitions. [2020-10-27 14:55:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:55:26,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:26,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:26,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:55:26,370 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -230217722, now seen corresponding path program 1 times [2020-10-27 14:55:26,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:26,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587462919] [2020-10-27 14:55:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:26,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:28,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:28,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:29,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:55:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:55:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:55:31,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:31,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:31,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:55:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:31,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 14:55:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:31,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:31,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:31,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:55:31,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587462919] [2020-10-27 14:55:31,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:31,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:55:31,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301391913] [2020-10-27 14:55:31,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:55:31,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:55:31,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:55:31,712 INFO L87 Difference]: Start difference. First operand 524 states and 628 transitions. Second operand 12 states. [2020-10-27 14:55:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:33,435 INFO L93 Difference]: Finished difference Result 806 states and 988 transitions. [2020-10-27 14:55:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:55:33,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-27 14:55:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:33,439 INFO L225 Difference]: With dead ends: 806 [2020-10-27 14:55:33,439 INFO L226 Difference]: Without dead ends: 803 [2020-10-27 14:55:33,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:55:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-10-27 14:55:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 684. [2020-10-27 14:55:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-10-27 14:55:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 841 transitions. [2020-10-27 14:55:33,625 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 841 transitions. Word has length 79 [2020-10-27 14:55:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:33,625 INFO L481 AbstractCegarLoop]: Abstraction has 684 states and 841 transitions. [2020-10-27 14:55:33,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:55:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 841 transitions. [2020-10-27 14:55:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:55:33,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:33,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:33,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:55:33,628 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1461774292, now seen corresponding path program 5 times [2020-10-27 14:55:33,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:33,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771550979] [2020-10-27 14:55:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:33,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:36,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:38,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:38,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:55:38,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:55:38,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:55:38,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:39,277 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-27 14:55:39,515 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-27 14:55:39,851 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-10-27 14:55:40,154 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-27 14:55:40,462 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 27 [2020-10-27 14:55:40,923 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-27 14:55:41,182 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 27 [2020-10-27 14:55:41,474 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 19 [2020-10-27 14:55:41,799 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-27 14:55:42,046 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2020-10-27 14:55:42,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:42,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:42,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:42,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:42,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:55:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771550979] [2020-10-27 14:55:42,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:42,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:55:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859637000] [2020-10-27 14:55:42,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:55:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:55:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:55:42,940 INFO L87 Difference]: Start difference. First operand 684 states and 841 transitions. Second operand 22 states. [2020-10-27 14:55:44,289 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-27 14:55:44,508 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 14:55:45,187 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 14:55:45,436 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2020-10-27 14:55:45,658 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 19 [2020-10-27 14:55:46,129 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 19 [2020-10-27 14:55:46,635 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2020-10-27 14:55:46,905 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 23 [2020-10-27 14:55:47,249 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 26 [2020-10-27 14:55:47,510 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 25 [2020-10-27 14:55:47,944 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 29 [2020-10-27 14:55:48,380 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 34 [2020-10-27 14:55:48,849 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2020-10-27 14:55:49,106 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 28 [2020-10-27 14:55:49,405 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 27