/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=SHALLOWEST --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/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:35:37,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:35:37,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:35:37,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:35:37,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:35:37,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:35:37,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:35:37,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:35:37,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:35:37,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:35:37,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:35:37,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:35:37,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:35:37,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:35:37,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:35:37,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:35:37,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:35:37,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:35:37,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:35:37,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:35:37,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:35:37,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:35:37,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:35:37,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:35:37,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:35:37,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:35:37,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:35:37,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:35:37,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:35:37,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:35:37,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:35:37,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:35:37,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:35:37,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:35:37,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:35:37,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:35:37,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:35:37,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:35:37,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:35:37,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:35:37,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:35:37,605 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 [2020-10-26 22:35:37,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:35:37,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:35:37,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:35:37,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:35:37,663 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:35:37,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:35:37,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:35:37,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:35:37,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:35:37,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:35:37,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:35:37,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:35:37,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:35:37,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:35:37,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:35:37,667 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:35:37,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:35:37,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:35:37,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:35:37,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:35:37,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:35:37,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:35:37,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:35:37,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:35:37,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:35:37,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:35:37,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:35:37,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:35:37,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:35:37,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:35:38,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:35:38,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:35:38,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:35:38,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:35:38,164 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:35:38,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2020-10-26 22:35:38,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d871d49ce/11100cf1d967403e8433de46633dd230/FLAG1755de541 [2020-10-26 22:35:39,083 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:35:39,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2020-10-26 22:35:39,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d871d49ce/11100cf1d967403e8433de46633dd230/FLAG1755de541 [2020-10-26 22:35:39,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d871d49ce/11100cf1d967403e8433de46633dd230 [2020-10-26 22:35:39,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:35:39,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:35:39,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:35:39,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:35:39,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:35:39,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:35:39" (1/1) ... [2020-10-26 22:35:39,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774ed2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:39, skipping insertion in model container [2020-10-26 22:35:39,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:35:39" (1/1) ... [2020-10-26 22:35:39,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:35:39,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:35:40,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:35:40,030 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:35:40,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:35:40,246 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:35:40,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40 WrapperNode [2020-10-26 22:35:40,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:35:40,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:35:40,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:35:40,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:35:40,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (1/1) ... [2020-10-26 22:35:40,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:35:40,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:35:40,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:35:40,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:35:40,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (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 [2020-10-26 22:35:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:35:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:35:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:35:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:35:40,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:35:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:35:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:35:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:35:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:35:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:35:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:35:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:35:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:35:40,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:35:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:35:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:35:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:35:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:35:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:35:42,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:35:42,653 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:35:42,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:35:42 BoogieIcfgContainer [2020-10-26 22:35:42,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:35:42,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:35:42,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:35:42,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:35:42,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:35:39" (1/3) ... [2020-10-26 22:35:42,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dea9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:35:42, skipping insertion in model container [2020-10-26 22:35:42,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:35:40" (2/3) ... [2020-10-26 22:35:42,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41dea9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:35:42, skipping insertion in model container [2020-10-26 22:35:42,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:35:42" (3/3) ... [2020-10-26 22:35:42,665 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2020-10-26 22:35:42,678 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:35:42,684 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:35:42,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:35:42,728 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:35:42,728 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:35:42,729 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:35:42,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:35:42,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:35:42,729 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:35:42,729 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:35:42,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:35:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:35:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 22:35:42,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:42,765 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] [2020-10-26 22:35:42,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1711841760, now seen corresponding path program 1 times [2020-10-26 22:35:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:42,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187432610] [2020-10-26 22:35:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:43,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:43,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:43,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 22:35:43,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:43,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-26 22:35:43,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:35:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:35:43,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 22:35:43,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:35:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:43,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:43,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:43,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:43,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 22:35:43,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:35:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:35:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:35:44,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187432610] [2020-10-26 22:35:44,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:35:44,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:35:44,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169555291] [2020-10-26 22:35:44,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:35:44,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:35:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:35:44,055 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-26 22:35:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:47,312 INFO L93 Difference]: Finished difference Result 810 states and 1408 transitions. [2020-10-26 22:35:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:35:47,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-26 22:35:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:47,333 INFO L225 Difference]: With dead ends: 810 [2020-10-26 22:35:47,333 INFO L226 Difference]: Without dead ends: 434 [2020-10-26 22:35:47,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:35:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-26 22:35:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 425. [2020-10-26 22:35:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-26 22:35:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 612 transitions. [2020-10-26 22:35:47,436 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 612 transitions. Word has length 32 [2020-10-26 22:35:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:47,437 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 612 transitions. [2020-10-26 22:35:47,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:35:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 612 transitions. [2020-10-26 22:35:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 22:35:47,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:47,443 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:35:47,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:35:47,443 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1105290308, now seen corresponding path program 1 times [2020-10-26 22:35:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525920374] [2020-10-26 22:35:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:47,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:49,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:49,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 22:35:49,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:35:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-26 22:35:49,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:35:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:35:49,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:35:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:35:49,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:49,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:49,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:49,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:49,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 22:35:49,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:49,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:49,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:49,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:35:49,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:35:49,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:49,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:49,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:35:49,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:49,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 22:35:49,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:35:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:35:49,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525920374] [2020-10-26 22:35:49,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:35:49,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:35:49,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788698356] [2020-10-26 22:35:49,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:35:49,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:35:49,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:35:49,622 INFO L87 Difference]: Start difference. First operand 425 states and 612 transitions. Second operand 7 states. [2020-10-26 22:35:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:53,069 INFO L93 Difference]: Finished difference Result 1269 states and 1867 transitions. [2020-10-26 22:35:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:35:53,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-26 22:35:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:53,079 INFO L225 Difference]: With dead ends: 1269 [2020-10-26 22:35:53,079 INFO L226 Difference]: Without dead ends: 850 [2020-10-26 22:35:53,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:35:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-10-26 22:35:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 818. [2020-10-26 22:35:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 818 states. [2020-10-26 22:35:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1127 transitions. [2020-10-26 22:35:53,166 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1127 transitions. Word has length 104 [2020-10-26 22:35:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:53,166 INFO L481 AbstractCegarLoop]: Abstraction has 818 states and 1127 transitions. [2020-10-26 22:35:53,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:35:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1127 transitions. [2020-10-26 22:35:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 22:35:53,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:53,171 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:35:53,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:35:53,171 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1111305784, now seen corresponding path program 1 times [2020-10-26 22:35:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:53,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054399133] [2020-10-26 22:35:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:53,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:53,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:55,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 22:35:55,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:35:55,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-26 22:35:55,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:35:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:35:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:35:55,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:55,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:35:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:55,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:55,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:35:55,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:55,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 22:35:55,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:35:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:35:55,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:35:55,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:55,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:35:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:55,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:55,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:35:55,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:35:55,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:35:55,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:35:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:35:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054399133] [2020-10-26 22:35:56,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:35:56,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:35:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341414111] [2020-10-26 22:35:56,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:35:56,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:35:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:35:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:35:56,091 INFO L87 Difference]: Start difference. First operand 818 states and 1127 transitions. Second operand 7 states. [2020-10-26 22:35:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:35:59,247 INFO L93 Difference]: Finished difference Result 1643 states and 2273 transitions. [2020-10-26 22:35:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:35:59,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-26 22:35:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:35:59,260 INFO L225 Difference]: With dead ends: 1643 [2020-10-26 22:35:59,260 INFO L226 Difference]: Without dead ends: 831 [2020-10-26 22:35:59,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:35:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-10-26 22:35:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 817. [2020-10-26 22:35:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-10-26 22:35:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1059 transitions. [2020-10-26 22:35:59,319 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1059 transitions. Word has length 106 [2020-10-26 22:35:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:35:59,322 INFO L481 AbstractCegarLoop]: Abstraction has 817 states and 1059 transitions. [2020-10-26 22:35:59,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:35:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1059 transitions. [2020-10-26 22:35:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 22:35:59,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:35:59,338 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:35:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:35:59,339 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:35:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:35:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1607096918, now seen corresponding path program 1 times [2020-10-26 22:35:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:35:59,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879898328] [2020-10-26 22:35:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:35:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:35:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:35:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:00,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:00,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:36:00,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:00,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-26 22:36:00,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:36:00,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-26 22:36:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:36:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:00,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:00,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:00,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:00,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:36:00,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:00,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:00,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:00,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:00,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:00,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:00,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:00,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:00,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-26 22:36:00,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:00,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:36:00,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:36:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:36:00,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879898328] [2020-10-26 22:36:00,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:00,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:36:00,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107459728] [2020-10-26 22:36:00,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:36:00,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:36:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:00,985 INFO L87 Difference]: Start difference. First operand 817 states and 1059 transitions. Second operand 6 states. [2020-10-26 22:36:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:03,964 INFO L93 Difference]: Finished difference Result 1678 states and 2402 transitions. [2020-10-26 22:36:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:36:03,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2020-10-26 22:36:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:03,977 INFO L225 Difference]: With dead ends: 1678 [2020-10-26 22:36:03,977 INFO L226 Difference]: Without dead ends: 1245 [2020-10-26 22:36:03,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:36:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2020-10-26 22:36:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1222. [2020-10-26 22:36:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1222 states. [2020-10-26 22:36:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1567 transitions. [2020-10-26 22:36:04,027 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1567 transitions. Word has length 148 [2020-10-26 22:36:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:04,028 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 1567 transitions. [2020-10-26 22:36:04,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:36:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1567 transitions. [2020-10-26 22:36:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 22:36:04,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:04,031 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:04,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:36:04,031 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -18866381, now seen corresponding path program 1 times [2020-10-26 22:36:04,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937830700] [2020-10-26 22:36:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:04,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:04,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:36:04,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 22:36:04,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:04,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:04,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:04,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:04,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:04,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:04,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:04,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:04,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:36:04,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:36:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:36:04,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937830700] [2020-10-26 22:36:04,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:04,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:36:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157702016] [2020-10-26 22:36:04,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:36:04,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:36:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:04,859 INFO L87 Difference]: Start difference. First operand 1222 states and 1567 transitions. Second operand 6 states. [2020-10-26 22:36:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:08,523 INFO L93 Difference]: Finished difference Result 3053 states and 4247 transitions. [2020-10-26 22:36:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:36:08,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-10-26 22:36:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:08,549 INFO L225 Difference]: With dead ends: 3053 [2020-10-26 22:36:08,549 INFO L226 Difference]: Without dead ends: 2215 [2020-10-26 22:36:08,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:36:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-26 22:36:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2201. [2020-10-26 22:36:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2201 states. [2020-10-26 22:36:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2872 transitions. [2020-10-26 22:36:08,648 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2872 transitions. Word has length 163 [2020-10-26 22:36:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:08,648 INFO L481 AbstractCegarLoop]: Abstraction has 2201 states and 2872 transitions. [2020-10-26 22:36:08,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:36:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2872 transitions. [2020-10-26 22:36:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 22:36:08,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:08,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:08,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:36:08,657 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash 935369518, now seen corresponding path program 1 times [2020-10-26 22:36:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:08,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51687178] [2020-10-26 22:36:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:08,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:08,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:10,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:11,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:11,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2276 [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:36:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:36:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:11,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:11,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:36:11,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:11,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:11,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:11,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:11,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:11,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:11,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 22:36:11,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:11,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:11,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:36:11,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:11,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:11,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:11,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:11,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:36:11,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:11,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 22:36:11,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:11,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:11,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:11,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:36:11,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:11,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51687178] [2020-10-26 22:36:11,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:11,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:11,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195229509] [2020-10-26 22:36:11,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:11,834 INFO L87 Difference]: Start difference. First operand 2201 states and 2872 transitions. Second operand 7 states. [2020-10-26 22:36:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:15,382 INFO L93 Difference]: Finished difference Result 4676 states and 6437 transitions. [2020-10-26 22:36:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:36:15,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 222 [2020-10-26 22:36:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:15,400 INFO L225 Difference]: With dead ends: 4676 [2020-10-26 22:36:15,400 INFO L226 Difference]: Without dead ends: 2859 [2020-10-26 22:36:15,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:36:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-10-26 22:36:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2814. [2020-10-26 22:36:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2814 states. [2020-10-26 22:36:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3662 transitions. [2020-10-26 22:36:15,513 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3662 transitions. Word has length 222 [2020-10-26 22:36:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:15,514 INFO L481 AbstractCegarLoop]: Abstraction has 2814 states and 3662 transitions. [2020-10-26 22:36:15,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3662 transitions. [2020-10-26 22:36:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 22:36:15,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:15,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:15,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:36:15,520 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:15,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1624525850, now seen corresponding path program 1 times [2020-10-26 22:36:15,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:15,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965846710] [2020-10-26 22:36:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:15,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:16,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:16,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 22:36:16,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:36:16,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:16,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:16,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:16,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:16,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:16,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:16,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:16,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:16,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 22:36:16,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:16,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:16,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:16,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:16,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:36:16,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 22:36:16,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:36:16,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 22:36:16,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965846710] [2020-10-26 22:36:16,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:16,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:36:16,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648249373] [2020-10-26 22:36:16,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:36:16,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:36:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:36:16,965 INFO L87 Difference]: Start difference. First operand 2814 states and 3662 transitions. Second operand 5 states. [2020-10-26 22:36:18,071 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:36:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:19,174 INFO L93 Difference]: Finished difference Result 5269 states and 6972 transitions. [2020-10-26 22:36:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:36:19,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2020-10-26 22:36:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:19,198 INFO L225 Difference]: With dead ends: 5269 [2020-10-26 22:36:19,198 INFO L226 Difference]: Without dead ends: 2824 [2020-10-26 22:36:19,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2020-10-26 22:36:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2814. [2020-10-26 22:36:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2814 states. [2020-10-26 22:36:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3658 transitions. [2020-10-26 22:36:19,299 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3658 transitions. Word has length 232 [2020-10-26 22:36:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:19,300 INFO L481 AbstractCegarLoop]: Abstraction has 2814 states and 3658 transitions. [2020-10-26 22:36:19,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:36:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3658 transitions. [2020-10-26 22:36:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 22:36:19,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:19,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:19,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:36:19,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1381541734, now seen corresponding path program 1 times [2020-10-26 22:36:19,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:19,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221940768] [2020-10-26 22:36:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:19,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:21,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:21,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 22:36:21,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2053 [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:36:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:21,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:21,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:21,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:21,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:21,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:21,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:21,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:21,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:21,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:36:21,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 22:36:21,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:36:21,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:36:21,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:36:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:22,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:22,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:36:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 22:36:22,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:36:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:22,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221940768] [2020-10-26 22:36:22,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:22,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:22,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202065356] [2020-10-26 22:36:22,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:22,167 INFO L87 Difference]: Start difference. First operand 2814 states and 3658 transitions. Second operand 7 states. [2020-10-26 22:36:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:26,107 INFO L93 Difference]: Finished difference Result 6469 states and 8788 transitions. [2020-10-26 22:36:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:36:26,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-10-26 22:36:26,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:26,129 INFO L225 Difference]: With dead ends: 6469 [2020-10-26 22:36:26,129 INFO L226 Difference]: Without dead ends: 4039 [2020-10-26 22:36:26,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:36:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2020-10-26 22:36:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 3990. [2020-10-26 22:36:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3990 states. [2020-10-26 22:36:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 5093 transitions. [2020-10-26 22:36:26,257 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 5093 transitions. Word has length 232 [2020-10-26 22:36:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:26,258 INFO L481 AbstractCegarLoop]: Abstraction has 3990 states and 5093 transitions. [2020-10-26 22:36:26,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 5093 transitions. [2020-10-26 22:36:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 22:36:26,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:26,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:26,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:36:26,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1858214826, now seen corresponding path program 1 times [2020-10-26 22:36:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:26,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579147855] [2020-10-26 22:36:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:26,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:28,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:28,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 22:36:28,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2203 [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:36:28,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:28,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:28,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:28,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:28,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:28,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:36:28,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:28,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:28,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:28,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:28,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:28,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:36:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:36:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:29,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:36:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:29,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:36:29,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:29,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:36:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579147855] [2020-10-26 22:36:29,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:29,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960458426] [2020-10-26 22:36:29,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:29,275 INFO L87 Difference]: Start difference. First operand 3990 states and 5093 transitions. Second operand 7 states. [2020-10-26 22:36:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:32,821 INFO L93 Difference]: Finished difference Result 8223 states and 10646 transitions. [2020-10-26 22:36:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:32,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-26 22:36:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:32,851 INFO L225 Difference]: With dead ends: 8223 [2020-10-26 22:36:32,852 INFO L226 Difference]: Without dead ends: 4617 [2020-10-26 22:36:32,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2020-10-26 22:36:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 4590. [2020-10-26 22:36:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4590 states. [2020-10-26 22:36:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 5811 transitions. [2020-10-26 22:36:32,989 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 5811 transitions. Word has length 253 [2020-10-26 22:36:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:32,990 INFO L481 AbstractCegarLoop]: Abstraction has 4590 states and 5811 transitions. [2020-10-26 22:36:32,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 5811 transitions. [2020-10-26 22:36:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 22:36:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:32,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:32,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:36:32,997 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:32,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1671124446, now seen corresponding path program 1 times [2020-10-26 22:36:32,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:32,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292162854] [2020-10-26 22:36:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:33,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:34,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:34,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-26 22:36:34,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-26 22:36:34,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:36:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 22:36:34,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:34,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:34,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:34,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:34,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:36:34,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:34,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:34,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:34,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:34,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:36:34,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:34,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:34,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:36:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:34,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:34,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:36:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 22:36:34,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:34,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:36:34,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 22:36:34,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292162854] [2020-10-26 22:36:34,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:34,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:36:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614402760] [2020-10-26 22:36:34,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:36:34,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:36:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:36:34,727 INFO L87 Difference]: Start difference. First operand 4590 states and 5811 transitions. Second operand 5 states. [2020-10-26 22:36:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:36,936 INFO L93 Difference]: Finished difference Result 8830 states and 11297 transitions. [2020-10-26 22:36:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:36:36,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2020-10-26 22:36:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:36,964 INFO L225 Difference]: With dead ends: 8830 [2020-10-26 22:36:36,964 INFO L226 Difference]: Without dead ends: 4604 [2020-10-26 22:36:36,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2020-10-26 22:36:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4590. [2020-10-26 22:36:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4590 states. [2020-10-26 22:36:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 5805 transitions. [2020-10-26 22:36:37,112 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 5805 transitions. Word has length 259 [2020-10-26 22:36:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:37,113 INFO L481 AbstractCegarLoop]: Abstraction has 4590 states and 5805 transitions. [2020-10-26 22:36:37,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:36:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 5805 transitions. [2020-10-26 22:36:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 22:36:37,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:37,119 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:37,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:36:37,120 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1739173194, now seen corresponding path program 1 times [2020-10-26 22:36:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570578529] [2020-10-26 22:36:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:37,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:39,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:39,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-26 22:36:39,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2231 [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:36:39,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:39,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:39,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:39,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:39,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:39,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:36:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:39,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:36:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:39,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:39,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:36:39,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:39,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 22:36:39,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:39,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:39,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:39,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:36:39,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:40,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570578529] [2020-10-26 22:36:40,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:40,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:40,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450053024] [2020-10-26 22:36:40,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:40,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:40,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:40,070 INFO L87 Difference]: Start difference. First operand 4590 states and 5805 transitions. Second operand 7 states. [2020-10-26 22:36:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:44,558 INFO L93 Difference]: Finished difference Result 10803 states and 14333 transitions. [2020-10-26 22:36:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:44,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-10-26 22:36:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:44,599 INFO L225 Difference]: With dead ends: 10803 [2020-10-26 22:36:44,600 INFO L226 Difference]: Without dead ends: 6597 [2020-10-26 22:36:44,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2020-10-26 22:36:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 6561. [2020-10-26 22:36:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6561 states. [2020-10-26 22:36:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 8368 transitions. [2020-10-26 22:36:44,792 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 8368 transitions. Word has length 259 [2020-10-26 22:36:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:44,793 INFO L481 AbstractCegarLoop]: Abstraction has 6561 states and 8368 transitions. [2020-10-26 22:36:44,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 8368 transitions. [2020-10-26 22:36:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-26 22:36:44,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:44,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:44,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:36:44,801 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1206948384, now seen corresponding path program 1 times [2020-10-26 22:36:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504459225] [2020-10-26 22:36:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:44,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:46,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:46,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-26 22:36:46,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:46,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2059 [2020-10-26 22:36:46,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:36:46,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:36:46,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:47,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:47,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:47,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:47,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:47,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:36:47,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:47,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:47,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:47,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:47,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:47,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:47,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:47,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:47,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:36:47,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:36:47,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:36:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:47,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:47,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:47,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:36:47,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:47,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 22:36:47,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:36:47,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504459225] [2020-10-26 22:36:47,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:47,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756481551] [2020-10-26 22:36:47,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:47,693 INFO L87 Difference]: Start difference. First operand 6561 states and 8368 transitions. Second operand 7 states. [2020-10-26 22:36:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:51,344 INFO L93 Difference]: Finished difference Result 14930 states and 20161 transitions. [2020-10-26 22:36:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:51,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 271 [2020-10-26 22:36:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:51,384 INFO L225 Difference]: With dead ends: 14930 [2020-10-26 22:36:51,384 INFO L226 Difference]: Without dead ends: 8753 [2020-10-26 22:36:51,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2020-10-26 22:36:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 8277. [2020-10-26 22:36:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8277 states. [2020-10-26 22:36:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 10471 transitions. [2020-10-26 22:36:51,641 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 10471 transitions. Word has length 271 [2020-10-26 22:36:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:51,642 INFO L481 AbstractCegarLoop]: Abstraction has 8277 states and 10471 transitions. [2020-10-26 22:36:51,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 10471 transitions. [2020-10-26 22:36:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-26 22:36:51,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:51,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:51,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:36:51,651 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2021441785, now seen corresponding path program 1 times [2020-10-26 22:36:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113449396] [2020-10-26 22:36:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:54,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:54,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2559 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 195 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:36:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:54,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:54,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:54,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:54,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-26 22:36:54,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:54,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-26 22:36:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:54,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:54,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:54,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:36:54,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:54,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 22:36:54,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:54,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:36:54,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113449396] [2020-10-26 22:36:55,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:55,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097246254] [2020-10-26 22:36:55,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:55,087 INFO L87 Difference]: Start difference. First operand 8277 states and 10471 transitions. Second operand 7 states. [2020-10-26 22:36:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:58,594 INFO L93 Difference]: Finished difference Result 16802 states and 21471 transitions. [2020-10-26 22:36:58,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:58,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 291 [2020-10-26 22:36:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:58,631 INFO L225 Difference]: With dead ends: 16802 [2020-10-26 22:36:58,631 INFO L226 Difference]: Without dead ends: 8909 [2020-10-26 22:36:58,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8909 states. [2020-10-26 22:36:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8909 to 8487. [2020-10-26 22:36:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8487 states. [2020-10-26 22:36:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8487 states to 8487 states and 10658 transitions. [2020-10-26 22:36:58,936 INFO L78 Accepts]: Start accepts. Automaton has 8487 states and 10658 transitions. Word has length 291 [2020-10-26 22:36:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:58,937 INFO L481 AbstractCegarLoop]: Abstraction has 8487 states and 10658 transitions. [2020-10-26 22:36:58,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8487 states and 10658 transitions. [2020-10-26 22:36:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-26 22:36:58,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:58,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:36:58,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:36:58,949 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1978472559, now seen corresponding path program 1 times [2020-10-26 22:36:58,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:58,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209470712] [2020-10-26 22:36:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:59,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:01,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-26 22:37:01,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2429 [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-26 22:37:01,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:01,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:01,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:01,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:01,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:01,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:01,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:01,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:37:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:37:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:01,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:02,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:02,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 22:37:02,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:02,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 22:37:02,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:37:02,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:02,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209470712] [2020-10-26 22:37:02,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:02,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:02,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334566235] [2020-10-26 22:37:02,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:02,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:02,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:02,240 INFO L87 Difference]: Start difference. First operand 8487 states and 10658 transitions. Second operand 7 states. [2020-10-26 22:37:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:06,597 INFO L93 Difference]: Finished difference Result 17007 states and 21386 transitions. [2020-10-26 22:37:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:06,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 322 [2020-10-26 22:37:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:06,627 INFO L225 Difference]: With dead ends: 17007 [2020-10-26 22:37:06,627 INFO L226 Difference]: Without dead ends: 8904 [2020-10-26 22:37:06,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8904 states. [2020-10-26 22:37:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8904 to 8485. [2020-10-26 22:37:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8485 states. [2020-10-26 22:37:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8485 states to 8485 states and 10577 transitions. [2020-10-26 22:37:06,846 INFO L78 Accepts]: Start accepts. Automaton has 8485 states and 10577 transitions. Word has length 322 [2020-10-26 22:37:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:06,847 INFO L481 AbstractCegarLoop]: Abstraction has 8485 states and 10577 transitions. [2020-10-26 22:37:06,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8485 states and 10577 transitions. [2020-10-26 22:37:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-26 22:37:06,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:06,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-26 22:37:06,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:37:06,859 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -899647582, now seen corresponding path program 1 times [2020-10-26 22:37:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:06,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574993973] [2020-10-26 22:37:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:07,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:37:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:37:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:37:08,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:08,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:37:08,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 22:37:08,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:37:08,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:37:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:37:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:37:08,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:09,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574993973] [2020-10-26 22:37:09,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:09,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:37:09,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468779836] [2020-10-26 22:37:09,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:37:09,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:09,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:37:09,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:09,042 INFO L87 Difference]: Start difference. First operand 8485 states and 10577 transitions. Second operand 8 states. [2020-10-26 22:37:11,008 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:37:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:13,721 INFO L93 Difference]: Finished difference Result 19124 states and 24196 transitions. [2020-10-26 22:37:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:13,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 345 [2020-10-26 22:37:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:13,762 INFO L225 Difference]: With dead ends: 19124 [2020-10-26 22:37:13,762 INFO L226 Difference]: Without dead ends: 11004 [2020-10-26 22:37:13,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11004 states. [2020-10-26 22:37:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11004 to 10975. [2020-10-26 22:37:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10975 states. [2020-10-26 22:37:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10975 states to 10975 states and 13849 transitions. [2020-10-26 22:37:14,031 INFO L78 Accepts]: Start accepts. Automaton has 10975 states and 13849 transitions. Word has length 345 [2020-10-26 22:37:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:14,032 INFO L481 AbstractCegarLoop]: Abstraction has 10975 states and 13849 transitions. [2020-10-26 22:37:14,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:37:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10975 states and 13849 transitions. [2020-10-26 22:37:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-26 22:37:14,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:14,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 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, 1] [2020-10-26 22:37:14,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:37:14,045 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 885268502, now seen corresponding path program 1 times [2020-10-26 22:37:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:14,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030607488] [2020-10-26 22:37:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:14,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:15,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:15,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 365 [2020-10-26 22:37:15,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:15,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1717 [2020-10-26 22:37:15,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:37:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:37:15,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:15,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:16,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:16,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:16,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:16,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:37:16,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:16,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:16,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:16,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:16,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:16,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:16,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:16,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:16,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:16,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 22:37:16,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:37:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:16,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:37:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:16,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:16,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:37:16,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:37:16,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:16,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:37:16,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:37:16,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030607488] [2020-10-26 22:37:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836928999] [2020-10-26 22:37:16,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:16,549 INFO L87 Difference]: Start difference. First operand 10975 states and 13849 transitions. Second operand 7 states. [2020-10-26 22:37:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:20,400 INFO L93 Difference]: Finished difference Result 24288 states and 30913 transitions. [2020-10-26 22:37:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:37:20,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 349 [2020-10-26 22:37:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:20,435 INFO L225 Difference]: With dead ends: 24288 [2020-10-26 22:37:20,435 INFO L226 Difference]: Without dead ends: 13505 [2020-10-26 22:37:20,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:37:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13505 states. [2020-10-26 22:37:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13505 to 13095. [2020-10-26 22:37:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13095 states. [2020-10-26 22:37:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13095 states to 13095 states and 16268 transitions. [2020-10-26 22:37:20,704 INFO L78 Accepts]: Start accepts. Automaton has 13095 states and 16268 transitions. Word has length 349 [2020-10-26 22:37:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:20,705 INFO L481 AbstractCegarLoop]: Abstraction has 13095 states and 16268 transitions. [2020-10-26 22:37:20,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13095 states and 16268 transitions. [2020-10-26 22:37:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-26 22:37:20,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:20,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 22:37:20,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:37:20,717 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash -302450162, now seen corresponding path program 1 times [2020-10-26 22:37:20,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:20,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017901450] [2020-10-26 22:37:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:20,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2356 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:37:23,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:23,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:23,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:23,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:23,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:23,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:23,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:37:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:37:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:37:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:37:23,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017901450] [2020-10-26 22:37:23,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:23,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:23,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410043022] [2020-10-26 22:37:23,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:23,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:23,901 INFO L87 Difference]: Start difference. First operand 13095 states and 16268 transitions. Second operand 7 states. [2020-10-26 22:37:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:27,468 INFO L93 Difference]: Finished difference Result 27423 states and 34376 transitions. [2020-10-26 22:37:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:37:27,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 353 [2020-10-26 22:37:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:27,521 INFO L225 Difference]: With dead ends: 27423 [2020-10-26 22:37:27,522 INFO L226 Difference]: Without dead ends: 14712 [2020-10-26 22:37:27,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14712 states. [2020-10-26 22:37:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14712 to 14653. [2020-10-26 22:37:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14653 states. [2020-10-26 22:37:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14653 states to 14653 states and 18222 transitions. [2020-10-26 22:37:27,868 INFO L78 Accepts]: Start accepts. Automaton has 14653 states and 18222 transitions. Word has length 353 [2020-10-26 22:37:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:27,869 INFO L481 AbstractCegarLoop]: Abstraction has 14653 states and 18222 transitions. [2020-10-26 22:37:27,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 14653 states and 18222 transitions. [2020-10-26 22:37:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-26 22:37:27,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:27,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:27,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:37:27,880 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2145569886, now seen corresponding path program 1 times [2020-10-26 22:37:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:27,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561137545] [2020-10-26 22:37:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:28,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:29,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 22:37:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:29,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:29,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:29,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:29,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:37:29,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:29,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:29,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:29,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:29,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:29,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:29,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:29,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 22:37:29,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:29,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 22:37:29,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:29,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:29,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:29,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:29,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:29,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-10-26 22:37:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 22:37:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-26 22:37:29,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561137545] [2020-10-26 22:37:29,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:29,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:37:29,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361522022] [2020-10-26 22:37:29,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:37:29,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:29,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:37:29,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:37:29,586 INFO L87 Difference]: Start difference. First operand 14653 states and 18222 transitions. Second operand 5 states. [2020-10-26 22:37:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:33,235 INFO L93 Difference]: Finished difference Result 30890 states and 39122 transitions. [2020-10-26 22:37:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:37:33,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2020-10-26 22:37:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:33,284 INFO L225 Difference]: With dead ends: 30890 [2020-10-26 22:37:33,284 INFO L226 Difference]: Without dead ends: 16621 [2020-10-26 22:37:33,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16621 states. [2020-10-26 22:37:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16621 to 16371. [2020-10-26 22:37:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16371 states. [2020-10-26 22:37:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16371 states to 16371 states and 20130 transitions. [2020-10-26 22:37:33,650 INFO L78 Accepts]: Start accepts. Automaton has 16371 states and 20130 transitions. Word has length 360 [2020-10-26 22:37:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:33,651 INFO L481 AbstractCegarLoop]: Abstraction has 16371 states and 20130 transitions. [2020-10-26 22:37:33,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:37:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16371 states and 20130 transitions. [2020-10-26 22:37:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-10-26 22:37:33,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:33,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:37:33,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:37:33,669 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:33,670 INFO L82 PathProgramCache]: Analyzing trace with hash 696924402, now seen corresponding path program 1 times [2020-10-26 22:37:33,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:33,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021346847] [2020-10-26 22:37:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:34,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 420 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3693 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:37:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 22:37:37,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:37,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:37,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:37,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:37,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:37,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:37,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:37,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:37,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:37,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:37:37,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:37:37,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:37:37,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:37,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-10-26 22:37:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:37,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:38,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:38,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:37:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 286 proven. 25 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-26 22:37:38,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021346847] [2020-10-26 22:37:38,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:38,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:37:38,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177600867] [2020-10-26 22:37:38,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:37:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:37:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:38,255 INFO L87 Difference]: Start difference. First operand 16371 states and 20130 transitions. Second operand 6 states. [2020-10-26 22:37:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:41,738 INFO L93 Difference]: Finished difference Result 34926 states and 43313 transitions. [2020-10-26 22:37:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:37:41,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 404 [2020-10-26 22:37:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:41,797 INFO L225 Difference]: With dead ends: 34926 [2020-10-26 22:37:41,797 INFO L226 Difference]: Without dead ends: 18939 [2020-10-26 22:37:41,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:41,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18939 states. [2020-10-26 22:37:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18939 to 16945. [2020-10-26 22:37:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16945 states. [2020-10-26 22:37:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16945 states to 16945 states and 20542 transitions. [2020-10-26 22:37:42,235 INFO L78 Accepts]: Start accepts. Automaton has 16945 states and 20542 transitions. Word has length 404 [2020-10-26 22:37:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:42,236 INFO L481 AbstractCegarLoop]: Abstraction has 16945 states and 20542 transitions. [2020-10-26 22:37:42,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:37:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 16945 states and 20542 transitions. [2020-10-26 22:37:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-10-26 22:37:42,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:42,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:37:42,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:37:42,254 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2036952456, now seen corresponding path program 1 times [2020-10-26 22:37:42,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:42,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619621786] [2020-10-26 22:37:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:42,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:42,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 424 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:37:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 22:37:44,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:44,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:44,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:44,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:44,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:44,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:44,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:44,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:44,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:44,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:44,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:37:44,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:44,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:37:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:44,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 22:37:44,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:37:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619621786] [2020-10-26 22:37:45,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:45,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:37:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057501832] [2020-10-26 22:37:45,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:37:45,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:45,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:37:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:45,265 INFO L87 Difference]: Start difference. First operand 16945 states and 20542 transitions. Second operand 8 states. [2020-10-26 22:37:46,688 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-10-26 22:37:47,219 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 22:37:47,798 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 22:37:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:50,941 INFO L93 Difference]: Finished difference Result 34511 states and 41774 transitions. [2020-10-26 22:37:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:37:50,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 408 [2020-10-26 22:37:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:50,983 INFO L225 Difference]: With dead ends: 34511 [2020-10-26 22:37:50,983 INFO L226 Difference]: Without dead ends: 17950 [2020-10-26 22:37:51,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:37:51,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17950 states. [2020-10-26 22:37:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17950 to 17521. [2020-10-26 22:37:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17521 states. [2020-10-26 22:37:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17521 states to 17521 states and 21181 transitions. [2020-10-26 22:37:51,343 INFO L78 Accepts]: Start accepts. Automaton has 17521 states and 21181 transitions. Word has length 408 [2020-10-26 22:37:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:51,344 INFO L481 AbstractCegarLoop]: Abstraction has 17521 states and 21181 transitions. [2020-10-26 22:37:51,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:37:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 17521 states and 21181 transitions. [2020-10-26 22:37:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-10-26 22:37:51,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:51,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:51,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:37:51,359 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1190544045, now seen corresponding path program 1 times [2020-10-26 22:37:51,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:51,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543636393] [2020-10-26 22:37:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:51,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2047 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:37:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:53,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:53,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:53,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:53,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:53,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:53,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:53,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:53,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:53,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:53,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:53,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:53,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 22:37:53,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:53,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:53,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:53,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:53,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:53,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-26 22:37:53,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-10-26 22:37:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:53,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:54,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:54,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 204 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-26 22:37:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543636393] [2020-10-26 22:37:54,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:54,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:37:54,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911549432] [2020-10-26 22:37:54,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:37:54,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:37:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:54,172 INFO L87 Difference]: Start difference. First operand 17521 states and 21181 transitions. Second operand 6 states. [2020-10-26 22:37:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:57,972 INFO L93 Difference]: Finished difference Result 38347 states and 47039 transitions. [2020-10-26 22:37:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:37:57,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 418 [2020-10-26 22:37:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:58,014 INFO L225 Difference]: With dead ends: 38347 [2020-10-26 22:37:58,014 INFO L226 Difference]: Without dead ends: 21210 [2020-10-26 22:37:58,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21210 states. [2020-10-26 22:37:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21210 to 20774. [2020-10-26 22:37:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20774 states. [2020-10-26 22:37:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 25368 transitions. [2020-10-26 22:37:58,412 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 25368 transitions. Word has length 418 [2020-10-26 22:37:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:58,413 INFO L481 AbstractCegarLoop]: Abstraction has 20774 states and 25368 transitions. [2020-10-26 22:37:58,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:37:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 25368 transitions. [2020-10-26 22:37:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-10-26 22:37:58,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:58,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:37:58,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:37:58,428 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:58,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1151621909, now seen corresponding path program 1 times [2020-10-26 22:37:58,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:58,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991201749] [2020-10-26 22:37:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:58,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:03,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:03,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-10-26 22:38:03,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:38:03,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 22:38:03,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:38:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:03,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 449 [2020-10-26 22:38:03,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:03,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:03,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:03,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:04,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:04,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:38:04,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:04,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 22:38:04,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:04,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 22:38:04,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:04,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:38:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:04,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:04,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:04,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:38:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:04,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-26 22:38:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 22:38:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:04,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-10-26 22:38:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:04,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:04,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:04,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:04,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:04,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-26 22:38:04,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:04,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:04,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:04,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:04,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 241 proven. 67 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-26 22:38:05,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991201749] [2020-10-26 22:38:05,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:05,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:38:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247177398] [2020-10-26 22:38:05,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:38:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:38:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:38:05,124 INFO L87 Difference]: Start difference. First operand 20774 states and 25368 transitions. Second operand 9 states. [2020-10-26 22:38:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:11,165 INFO L93 Difference]: Finished difference Result 49136 states and 61129 transitions. [2020-10-26 22:38:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 22:38:11,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 442 [2020-10-26 22:38:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:11,241 INFO L225 Difference]: With dead ends: 49136 [2020-10-26 22:38:11,241 INFO L226 Difference]: Without dead ends: 26939 [2020-10-26 22:38:11,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:38:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26939 states. [2020-10-26 22:38:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26939 to 25331. [2020-10-26 22:38:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25331 states. [2020-10-26 22:38:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 30648 transitions. [2020-10-26 22:38:11,803 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 30648 transitions. Word has length 442 [2020-10-26 22:38:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:11,804 INFO L481 AbstractCegarLoop]: Abstraction has 25331 states and 30648 transitions. [2020-10-26 22:38:11,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:38:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 30648 transitions. [2020-10-26 22:38:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-10-26 22:38:11,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:11,832 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:11,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:38:11,833 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1872996376, now seen corresponding path program 1 times [2020-10-26 22:38:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:11,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607375583] [2020-10-26 22:38:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:12,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4090 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-26 22:38:16,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:16,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:16,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:38:16,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:16,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:16,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:16,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:38:16,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:38:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 22:38:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:16,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-10-26 22:38:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:16,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:16,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:16,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 490 proven. 79 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 22:38:17,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607375583] [2020-10-26 22:38:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 22:38:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381928395] [2020-10-26 22:38:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:38:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:38:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:38:17,454 INFO L87 Difference]: Start difference. First operand 25331 states and 30648 transitions. Second operand 10 states. [2020-10-26 22:38:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:26,093 INFO L93 Difference]: Finished difference Result 54593 states and 66633 transitions. [2020-10-26 22:38:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 22:38:26,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 478 [2020-10-26 22:38:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:26,320 INFO L225 Difference]: With dead ends: 54593 [2020-10-26 22:38:26,320 INFO L226 Difference]: Without dead ends: 28108 [2020-10-26 22:38:26,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-26 22:38:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28108 states. [2020-10-26 22:38:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28108 to 27447. [2020-10-26 22:38:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27447 states. [2020-10-26 22:38:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27447 states to 27447 states and 33128 transitions. [2020-10-26 22:38:26,781 INFO L78 Accepts]: Start accepts. Automaton has 27447 states and 33128 transitions. Word has length 478 [2020-10-26 22:38:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:26,782 INFO L481 AbstractCegarLoop]: Abstraction has 27447 states and 33128 transitions. [2020-10-26 22:38:26,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:38:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27447 states and 33128 transitions. [2020-10-26 22:38:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-10-26 22:38:26,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:26,806 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:26,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:38:26,807 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2018279233, now seen corresponding path program 1 times [2020-10-26 22:38:26,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:26,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849987403] [2020-10-26 22:38:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:27,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:27,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:28,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:31,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 530 [2020-10-26 22:38:31,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 22:38:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 22:38:31,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:31,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 313 [2020-10-26 22:38:31,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:32,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:32,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 22:38:32,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:38:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-10-26 22:38:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-10-26 22:38:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:32,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:32,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 22:38:32,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:38:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 107 proven. 4 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2020-10-26 22:38:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849987403] [2020-10-26 22:38:32,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:32,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:38:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754289178] [2020-10-26 22:38:32,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:38:32,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:38:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:38:32,809 INFO L87 Difference]: Start difference. First operand 27447 states and 33128 transitions. Second operand 5 states. [2020-10-26 22:38:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:34,696 INFO L93 Difference]: Finished difference Result 54175 states and 65444 transitions. [2020-10-26 22:38:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:38:34,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 512 [2020-10-26 22:38:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:34,756 INFO L225 Difference]: With dead ends: 54175 [2020-10-26 22:38:34,756 INFO L226 Difference]: Without dead ends: 27112 [2020-10-26 22:38:34,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:38:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27112 states. [2020-10-26 22:38:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27112 to 27042. [2020-10-26 22:38:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27042 states. [2020-10-26 22:38:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27042 states to 27042 states and 32584 transitions. [2020-10-26 22:38:35,180 INFO L78 Accepts]: Start accepts. Automaton has 27042 states and 32584 transitions. Word has length 512 [2020-10-26 22:38:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:35,181 INFO L481 AbstractCegarLoop]: Abstraction has 27042 states and 32584 transitions. [2020-10-26 22:38:35,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:38:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27042 states and 32584 transitions. [2020-10-26 22:38:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-10-26 22:38:35,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:35,197 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:38:35,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:38:35,198 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash 159094345, now seen corresponding path program 1 times [2020-10-26 22:38:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:35,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190325208] [2020-10-26 22:38:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:35,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:40,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 533 [2020-10-26 22:38:40,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 425 [2020-10-26 22:38:40,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:40,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:40,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:40,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:40,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:40,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 22:38:40,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:38:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 22:38:41,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-10-26 22:38:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:38:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 411 [2020-10-26 22:38:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:42,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 396 proven. 222 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 22:38:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190325208] [2020-10-26 22:38:42,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:42,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 22:38:42,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024017736] [2020-10-26 22:38:42,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 22:38:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 22:38:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:38:42,557 INFO L87 Difference]: Start difference. First operand 27042 states and 32584 transitions. Second operand 12 states. [2020-10-26 22:38:45,883 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 22:38:46,943 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-26 22:38:47,648 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:38:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:49,117 INFO L93 Difference]: Finished difference Result 49019 states and 59645 transitions. [2020-10-26 22:38:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 22:38:49,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 515 [2020-10-26 22:38:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:49,167 INFO L225 Difference]: With dead ends: 49019 [2020-10-26 22:38:49,168 INFO L226 Difference]: Without dead ends: 22313 [2020-10-26 22:38:49,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-10-26 22:38:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22313 states. [2020-10-26 22:38:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22313 to 21667. [2020-10-26 22:38:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21667 states. [2020-10-26 22:38:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21667 states to 21667 states and 25273 transitions. [2020-10-26 22:38:49,626 INFO L78 Accepts]: Start accepts. Automaton has 21667 states and 25273 transitions. Word has length 515 [2020-10-26 22:38:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:49,626 INFO L481 AbstractCegarLoop]: Abstraction has 21667 states and 25273 transitions. [2020-10-26 22:38:49,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 22:38:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 21667 states and 25273 transitions. [2020-10-26 22:38:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-26 22:38:49,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:49,639 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:49,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:38:49,639 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash -527098725, now seen corresponding path program 1 times [2020-10-26 22:38:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:49,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281415733] [2020-10-26 22:38:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:50,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:52,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:54,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:54,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 535 [2020-10-26 22:38:54,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 273 [2020-10-26 22:38:54,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:55,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:55,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:55,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:55,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:55,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:38:55,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:55,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:38:55,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:38:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-10-26 22:38:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:55,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:38:55,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:55,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-26 22:38:55,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 22:38:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:56,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2020-10-26 22:38:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:56,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:56,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 518 proven. 56 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-26 22:38:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281415733] [2020-10-26 22:38:56,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:38:56,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139316463] [2020-10-26 22:38:56,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:38:56,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:38:56,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:38:56,823 INFO L87 Difference]: Start difference. First operand 21667 states and 25273 transitions. Second operand 9 states. [2020-10-26 22:38:56,969 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 22:38:57,874 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-26 22:39:00,059 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-26 22:39:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:04,779 INFO L93 Difference]: Finished difference Result 46441 states and 54968 transitions. [2020-10-26 22:39:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 22:39:04,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 517 [2020-10-26 22:39:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:04,835 INFO L225 Difference]: With dead ends: 46441 [2020-10-26 22:39:04,835 INFO L226 Difference]: Without dead ends: 24968 [2020-10-26 22:39:04,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-26 22:39:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24968 states. [2020-10-26 22:39:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24968 to 23552. [2020-10-26 22:39:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23552 states. [2020-10-26 22:39:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23552 states to 23552 states and 27221 transitions. [2020-10-26 22:39:05,299 INFO L78 Accepts]: Start accepts. Automaton has 23552 states and 27221 transitions. Word has length 517 [2020-10-26 22:39:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:05,299 INFO L481 AbstractCegarLoop]: Abstraction has 23552 states and 27221 transitions. [2020-10-26 22:39:05,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:39:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 23552 states and 27221 transitions. [2020-10-26 22:39:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2020-10-26 22:39:05,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:05,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:39:05,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 22:39:05,322 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1693523001, now seen corresponding path program 1 times [2020-10-26 22:39:05,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:05,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922337570] [2020-10-26 22:39:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 655 [2020-10-26 22:39:07,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:07,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1686 [2020-10-26 22:39:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:39:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 453 [2020-10-26 22:39:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:39:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:39:07,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:07,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:39:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:07,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:07,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:07,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-10-26 22:39:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:07,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 22:39:07,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 447 [2020-10-26 22:39:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:39:08,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 515 proven. 18 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2020-10-26 22:39:08,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922337570] [2020-10-26 22:39:08,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:08,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:39:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471475793] [2020-10-26 22:39:08,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:39:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:39:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:39:08,659 INFO L87 Difference]: Start difference. First operand 23552 states and 27221 transitions. Second operand 8 states.